# Boeing Special Attention Service Bulletin 747-25-3653: Revision 2 - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2024-2137; AD 2025-01-08 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Boeing Special Attention Service Bulletin 747-25-3653](https://openairdocs.org/service-documents/boeing/sb-747-25-3653.md) - Title as filed: SB747-25-3653-R02 - Pages: 95 - PDF: https://openairdocs.org/files/sha256/0d/2e/0d2ea2a0c41aa87e12fe39b2468822312a763fcc6495ec7ae5691b0b286b2cb2 - Page: https://openairdocs.org/service-documents/boeing/sb-747-25-3653/file/0d2ea2a0c41a ## Text Some pages are OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N. ### Page 1 Commercial Airplanes 747 Service Bulletin SPECIAL ATTENTION Number: 747-25-3653 Original Issue: August 04, 2017 Revision 2: January 27, 2023 ATA System: 2511 SUBJECT: EQUIPMENT/FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's Seats - Horizontal Movement System Inspection and Overhaul EXPORT CONTROLLED - This technology or software is subject to the U.S. Export Administration Regulations (EAR), (15 C.F.R. Parts 730-774). No authorization from the U.S. Department of Commerce is required for export, re-export, in-country transfer, or access EXCEPT to country group E:1 or E:2 countries/persons per Supp.1 to Part 740 of the EAR. 9E991ECCN: Copyright © 2017 Boeing. Unpublished Work. All Rights Reserved. Treatment of this document and its content is governed by contract with Boeing. Rights to use this document are licensed on a per aircraft basis and such rights may not be transferable. For more information, contact The Boeing Company. Boeing, the Boeing signature, the Boeing symbol, 707, 717, 727, 737, 747, 757, 767, 777, 787, Dreamliner, BBJ, DC-8, DC-9, DC-10, KC-10, KC-46, KDC-10, MD-10, MD-11, MD-80, MD-88, MD-90, P-8, Poseidon and Boeing liveries are all trademarks owned by The Boeing Company; and no trademark license is granted in connection with this document unless provided in writing by Boeing. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 1 of 95 3.0 ### Page 2 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 2 of 95 BOEING SERVICE BULLETIN 747-25-3653 BLANK PAGE ### Page 3 Table of Contents Revision Transmittal Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 39 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 41 3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 43 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47 FIGURE 1: FLIGHT COMPARTMENT - CAPTAIN'S SEAT TRACKS - FOREIGN OBJECT DEBRIS - REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 FIGURE 2: FLIGHT COMPARTMENT - FIRST OFFICER'S SEAT TRACKS - FOREIGN OBJECT DEBRIS - REMOVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 APPENDIX A: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 1: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 1, 3] . . . . . . . . . . . . . . . . . . . . . 65 APPENDIX B: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 2: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 1-2] . . . . . . . . . . . . . . . . . . . . . 68 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 3 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 4 APPENDIX C: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 3: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 2, 4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 APPENDIX D: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 4: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 3-4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 APPENDIX E: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 5: WORK PACKAGE 5 - CAPTAIN'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 1, 3; Group 2, Configuration 1, 3] . . . . . . . . . . . . . . . . . . 77 APPENDIX F: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 6: WORK PACKAGE 6 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 1-2; Group 2, Configuration 1-2] . . . . . . . . . . . . . 78 APPENDIX G: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 7: WORK PACKAGE 7 - CAPTAIN'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 2, 4; Group 2, Configuration 2, 4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 APPENDIX H: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 8: WORK PACKAGE 8 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM [Group 1, Configuration 3-4; Group 2, Configuration 3-4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 APPENDIX I: CAPTAIN'S AND FIRST OFFICER'S SEATS, PART NUMBER SERIES 3A258, HORIZONTAL MOVEMENT SYSTEM - HORIZONTAL ACTUATOR LOCATION [Group 1, Configuration 2-4; Group 2, Configuration 2-4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 APPENDIX J: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 9: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 2, Configuration 1, 3] . . . . . . . . . . . . . . . . . . . . . 84 APPENDIX K: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 10: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 2, Configuration 1-2] . . . . . . . . . . . . . . . . . . . . . 87 APPENDIX L: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 11: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 2, Configuration 2, 4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90 APPENDIX M: LOGIC DIAGRAM FOR PARAGRAPH 1.E., COMPLIANCE: TABLE 12: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM [Group 2, Configuration 3-4] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 4 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 5 Commercial Airplanes 747 Service Bulletin SPECIAL ATTENTION Revision Transmittal SheetNumber: 747-25-3653Original Issue: August 04, 2017 Revision 2: January 27, 2023 ATA System: 2511 SUBJECT: EQUIPMENT/FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's Seats - Horizontal Movement System Inspection and Overhaul This revision includes all pages of the service bulletin. COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2019-22-02 is related to this service bulletin. The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Airplane Variable Numbers RR724, RC076 and RC077 were added to new Group 2 of this service bulletin effectivity. Inactive Airplane Variable Numbers RL562, RM037, RM811, RM812, RM813, RM863, RR522, RS341, RS342, RS703, RS731, RS732, RS781, RS782, RS786, RT007, RT008, RT009, RT035, RT041, RT042, RT043, RT044, RT046, RT047, RT073, RT075, RT121, RT152, RT167, RT431, RT432, RT433, RT434, RT435, RT436, RT437, RT438, RT439, RT441, RT526, RT529, RT577, RT582, RT584, RT586, RT589, RT591, RT635, RT649, RT650, RT702, RT703, RT711, RT712, RT713, RT714, RT715, RT716, RT741, RT742, RT835, RT836, RT932, RT945, RT946, RU001, RU051, RU052, RU059, RU060, RU801, RU802, RU804, RU806, RU807, RU831, RU832, RU833, RU834,RU835, RU836, RU837, RU838, RU839, RU840 and RU841 were added to Group 1 of this service bulletin effectivity. Effects of this Revision on airplanes on which the Original Issue or Revision 1 was previously done: None. REASON FOR REVISION This revision is sent to give the newest issue of each concurrent supplier service bulletin and to change the effectivity of this service bulletin to be for delivered airplanes from line number 669 to 1526, and to add airplanes to effectivity of this service bulletin. Also, added option to install a serviceable seat for the Captain's and First Officer's seats. Compliance tasks for added airplanes are given a new compliance time. These sections were changed: 1. Summary, Background; changed and added information, added Service Related Problem (SRP) reference and changed the AD related information in the planning table. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 5 of 95 ### Page 6 2. Summary, Action; added Engineering Change Memo reference. 3. Summary, Compliance; added AD information. 4. Paragraph 1.A.1., Airplanes; changed and added information, listed specific line numbers and line number ranges, removed airplanes, added airplanes, added Group 2 and related Configurations, removed the note. 5. Paragraph 1.B., Concurrent Requirements; changed to give the newest issue of the supplier service bulletins. 6. Paragraph 1.C., Reason; changed and added information, SRP reference and added Revision 2 information. 7. Paragraph 1.D., Description; added Revision 2 information, and added 'Affected Maintenance Zones' table for Group 2. 8. Paragraph 1.E., Compliance; changed information, added AD information, changed the header of the compliance time columns. Added Option 1 and 2 for Condition 4 of Work Packages 3 and 4, added Tables 9 thru 12, and added applicability to Tables 5 thru 8. 9. Paragraph 1.F., Approval; added 'Union', and added Alternative Method Of Compliance (AMOC) paragraph. 10. Paragraph 1.G., Manpower; changed and added information, removed an incorrect task and footnote from Work Packages 7 and 8, and added applicability. 11. Paragraph 1.J.1., Existing Data; added references. 12. Paragraph 2.C.3., Parts Modified and Reidentified; divided information into two tables and added applicability, and corrected information. 13. Paragraph 3.A., General Information; changed Note 7. 14. Paragraph 3.B., Work Instructions; Changed 'Refer to' to 'At the time specified', added Option 1 and Option 2 for Condition 4 of Work Packages 3 and 4, added applicability, and changed footnote (a) of the table in Parts 1, 2, 3, 4, 7 and 8. 15. Appendix A and Appendix B; added flag note table, added flag note (a) to logic diagrams, and corrected typographical errors. 16. Appendix C and Appendix D; added Option 1 and Option 2 for Condition 4 of Work Packages 3 and 4 to logic diagrams, added flag note (b) to flag note table and logic diagrams, and corrected typographical errors. 17. Appendix E, F, G, H and I; changed applicability. 18. Appendix J, K, L and M; added. Vertical lines are put on the left edge of each page, except in Paragraph 1.A., Effectivity and format changes, to show the location of all content changes. Pages with no vertical lines have no changes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 6 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 7 REVISION HISTORY August 04, 2017Original Issue: October 19, 2018Revision 1: January 27, 2023Revision 2: Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 7 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 8 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 8 of 95 BOEING SERVICE BULLETIN 747-25-3653 BLANK PAGE ### Page 9 Commercial Airplanes 747 Service Bulletin SPECIAL ATTENTION SummaryNumber: 747-25-3653Original Issue: August 04, 2017 Revision 2: January 27, 2023 ATA System: 2511 SUBJECT: EQUIPMENT/FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's Seats - Horizontal Movement System Inspection and Overhaul BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY. CONCURRENT REQUIREMENTS Refer to Paragraph 1.B., Concurrent Requirements. BACKGROUND Accomplishment of this service bulletin will decrease the risk that the Captain's and First Officer's seats will have un-commanded seat movement because of horizontal actuator shaft failure. If this service bulletin is not done, the output shaft of the horizontal actuator on the Captain's and First Officer's seat(s) could break and cause an un-commanded seat movement. Un-commanded seat movement could lead to reduced controllability of the airplane. An operator reported the Captain's seat could not be locked in position after the horizontal position of the seat was adjusted in flight. The seat became unlocked from the track and moved freely forward and aft. Control was given to the First Officer for approach and landing. An inspection found the horizontal actuator output shaft had broken. When the horizontal actuator output shaft breaks, pilot's cannot prevent seat movement in a forward and aft direction and cannot lock the seat in position. A broken shaft is the result of high loads, that are more than design limits, from a stalled motor, that can occur due to high mechanical resistance to motion during powered operation of the seat. Any object that can potentially impede seat movement (Foreign Object Debris (FOD)) in the seat tracks is another condition that can result in a stalled motor and cause the horizontal actuator output shaft to break. This service bulletin gives instructions for airplanes with powered Ipeco part number series 3A090 Captain's seat or First Officer's seat installed, corrective actions are necessary by an off-airplane inspection of each seat by the applicable Ipeco service bulletin. Repeat on-airplane checks, at intervals not to exceed 36 months, are necessary for the Captain's and First Officer's seats by the applicable Ipeco service bulletin. This service bulletin gives instructions for airplanes with powered Ipeco part number series 3A258 Captain's seat or First Officer's seat installed, to find the part number and 'amendment' of the horizontal actuator of the Horizontal Movement System (HMS). If the horizontal actuator has Artus part number AD8650503 at 'Amendment B' or earlier or Artus part number AD8650502, corrective actions are necessary by an off-airplane inspection of each seat by the applicable Ipeco service bulletin, where signs of damage to the HMS make the replacement Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 9 of 95 ### Page 10 of the horizontal actuator necessary. If the actuator continues to be Artus part number AD8650503 at 'Amendment B' or earlier or Artus part number AD8650502, repeat on-airplane inspections are necessary for the Captain's and First Officer's seats by the applicable Ipeco service bulletin. Installation of a horizontal actuator, Artus part number AD8650503 at 'Amendment C' or later, will significantly decrease the risk of a broken horizontal actuator output shaft. Boeing Service Related Problem (SRP) 747-SRP-25-0306 and 747-SRP-25-0418 are related to this service bulletin. Boeing Fleet Team Digest (FTD) 747 FTD 25-12003 is related to this service bulletin. This table is provided to operators for planning purposes only. Refer to the applicable sections for more information. ReferenceAffectedPlanning Data Paragraph 1.A.2., Spares AffectedYesSpares Affected Paragraph 1.E., Compliance and Paragraph 1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesNoWeight and Balance Change Paragraph 1.I., Electrical Load DataNoElectrical Load Changed Paragraph 1.K., Publications AffectedYesPublications Affected Paragraph 1.K., Publications AffectedNoAirplane Flight Operations Affected (Flight Crew Operations Manual and/or FAA Approved Air- plane Flight Manual) Paragraph 2.C.1., Kits/PartsNoKits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator YesOperator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin YesSpecial Tooling Required ACTION (PRR 86900-26R, PRR 85901-136S) Do inspections and checks of the Captain's and First Officer's seats. Do corrective actions. EFFECTIVITY 747-200B/200C/200F/300/400/400D/400F/8/8F Airplanes equipped with Ipeco part number series 3A090 and 3A258 Captain's and First Officer's powered seats. Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplanes. Refer to Paragraph 1.A.2., Spares Affected for the list of affected components. COMPLIANCE Federal Aviation Administration (FAA) Airworthiness Directive AD 2019-22-02 is related to this service bulletin. The effective date of AD 2019-22-02 is January 16, 2020. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 10 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 11 Refer to Paragraph 1.E., Compliance. INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are not available for the inspection and/or repair procedures given in this service bulletin. MANPOWER Refer to Paragraph 1.G., Manpower. MATERIAL INFORMATION Operator Supplied Parts/Materials. Refer to Paragraph 2.A., Material - Price and Availability. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 11 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 12 (OCR) BOEING SERVICE BULLETIN 747-25-3653 FIRST OFFICER'S SEAT - CAPTAIN'S DO INSPECTIONS AND CHECKS OF THE CAPTAIN'S AND FIRST OFFICER'S SEATS. FWD DO CORRECTIVE ACTIONS. CAPTAIN'S SEAT (FIRST OFFICER'S SEAT OPPOSITE) (TYPICAL) 2383465 Original Issue: August 04, 2017 Revision 2: January 27, 2023 747-25-3653 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. 12 of 95 ### Page 13 Commercial Airplanes 747 Service Bulletin SPECIAL ATTENTION Number: 747-25-3653 Original Issue: August 04, 2017 Revision 2: January 27, 2023 ATA System: 2511 SUBJECT: EQUIPMENT/FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's Seats - Horizontal Movement System Inspection and Overhaul BOEING RECOMMENDS THAT EACH OPERATOR EXAMINE THIS DOCUMENT IMMEDIATELY. 1. PLANNING INFORMATION A. Effectivity 1. Airplanes Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. This bulletin is applicable to 747-8, 747-8F, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F Airplane(s), line number(s) 669, 681, 686, 688, 699-704, 707, 711-713, 717-720, 722-723, 725, 729, 732, 735-739, 741, 743, 745, 747-749, 752, 754-755, 757-758, 760-761, 763, 766-770, 775, 777-778, 780, 782-783, 785-787, 791-793, 796-798, 805, 808-810, 812, 814, 816, 821, 823-825, 827, 830-833, 836-840, 843-848, 850-856, 858-864, 868-872, 874, 876, 879, 884-885, 888-891, 893, 896-899, 901-902, 904-907, 909-910, 912, 914-915, 917-918, 920-923, 926-929, 932, 934-935, 938, 940-943, 945, 947-948, 950-958, 960-963, 965, 968-969, 971-972, 974-983, 986-987, 990-992, 994-1005, 1008-1017, 1019, 1021, 1023-1032, 1034-1047, 1049, 1051-1057, 1060, 1062-1064, 1066-1077, 1080-1084, 1086-1087, 1089-1101, 1103, 1105-1107, 1109-1112, 1114-1115, 1117-1119, 1122-1123, 1125, 1127-1128, 1130-1134, 1139-1140, 1142-1143, 1145, 1147, 1150-1153, 1155, 1158-1167, 1169-1170, 1173-1177, 1179, 1181-1182, 1184, 1186-1189, 1191-1192, 1199, 1202-1205, 1208, 1210, 1213-1217, 1219-1220, 1222, 1224-1225, 1227-1231, 1233-1244, 1246-1254, 1256-1270, 1272-1281, 1283-1296, 1298-1302, 1304-1519, 1521-9996 in 2 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive. The Variable Numbers and Group Information for the applicable airplanes is given below. An equivalent change is on production airplanes. Refer to PRR 85901-136S and PRR 86900-26R for data about this change. NOTE: The Variable Number table below includes affected airplanes available as of the issue date of this bulletin. Affected airplane Variable Numbers added to MyBoeingFleet.com after the issue date of this bulletin will be shown using the Maintenance Performance Toolbox EFFECTIVITY search function result. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 13 of 95 ### Page 14 DESCRIPTIONCONFIGURATIONGROUP 747-200B/200C/200F/300/400/400D/400F/8/8F Airplanes equipped with powered Ipeco Captain's and First Officer's seats. -1 Airplanes equipped with Ipeco Captain's seat, part number series 3A090, and Ipeco First Officer's seat, part number series 3A090. 1 Airplanes equipped with Ipeco Captain's seat, part number series 3A258, and Ipeco First Officer's seat, part number series 3A090. 2 Airplanes equipped with Ipeco Captain's seat, part number series 3A090, and Ipeco First Officer's seat, part number series 3A258. 3 Airplanes equipped with Ipeco Captain's seat, part number series 3A258, and Ipeco First Officer's seat, part number series 3A258. 4 747-400F/-8 Airplanes equipped with powered Ipeco Captain's and First Officer's seats. -2 Airplanes equipped with Ipeco Captain's seat, part number series 3A090, and Ipeco First Officer's seat, part number series 3A090. 1 Airplanes equipped with Ipeco Captain's seat, part number series 3A258, and Ipeco First Officer's seat, part number series 3A090. 2 Airplanes equipped with Ipeco Captain's seat, part number series 3A090, and Ipeco First Officer's seat, part number series 3A258. 3 Airplanes equipped with Ipeco Captain's seat, part number series 3A258, and Ipeco First Officer's seat, part number series 3A258. 4 Airplane Models: 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747-8, 747-8F GroupVariable Number 1RB421 1RC001 - RC009 1RC021 - RC040 1RC051 - RC060 1RC066 - RC072 2RC076 - RC077 1RC501 - RC514 1RC521 - RC528 1RC531 - RC541 GroupVariable Number 1RC546 - RC566 1RC571 - RC582 1RC601 - RC610 1RC641 - RC644 1RC651 - RC652 1RC661 1RC671 - RC672 1RC674 1RC681 - RC696 GroupVariable Number 1RC701 - RC704 1RF001 - RF006 1RJ321 - RJ322 1RL401 - RL403 1RL411 - RL436 1RL451 - RL456 1RL461 - RL462 1RL471 - RL481 1RL491 - RL492 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 14 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 15 GroupVariable Number 1RL501 - RL502 1RL511 - RL516 1RL521 - RL522 1RL531 - RL534 1RL551 1RL561 - RL568 1RL571 - RL572 1RL576 - RL577 1RL579 1RL581 - RL586 1RL651 - RL655 1RL671 - RL675 1RL681 - RL684 1RL751 - RL752 1RM001 - RM007 1RM010 - RM013 1RM021 - RM024 1RM026 - RM030 1RM036 - RM045 1RM051 - RM053 1RM071 1RM081 - RM084 1RM091 1RM116 - RM117 1RM126 - RM132 1RM146 - RM147 1RM156 - RM158 1RM192 1RM231 - RM233 1RM316 - RM318 1RM331 - RM333 1RM341 1RM351 - RM355 GroupVariable Number 1RM366 - RM367 1RM401 - RM403 1RM426 1RM431 1RM441 - RM443 1RM445 1RM801 - RM803 1RM811 - RM813 1RM851 - RM855 1RM859 1RM861 - RM863 1RM871 - RM899 1RM901 - RM906 1RM911 1RR024 - RR025 1RR451 1RR522 1RR701 1RR721 - RR723 2RR724 1RR746 - RR748 1RR851 - RR856 1RR861 - RR862 1RS331 - RS333 1RS341 - RS342 1RS703 1RS731 - RS732 1RS762 1RS781 - RS782 1RS786 1RT001 - RT014 1RT021 - RT022 1RT031 - RT035 GroupVariable Number 1RT041 - RT047 1RT061 1RT071 - RT075 1RT101 - RT103 1RT121 1RT135 - RT137 1RT151 - RT152 1RT161 - RT168 1RT431 - RT447 1RT501 - RT535 1RT571 - RT591 1RT631 - RT638 1RT641 - RT657 1RT681 - RT682 1RT691 - RT699 1RT701 - RT704 1RT711 - RT717 1RT741 - RT757 1RT776 - RT777 1RT781 - RT784 1RT801 - RT803 1RT811 - RT814 1RT831 - RT837 1RT861 - RT864 1RT876 - RT880 1RT931 - RT932 1RT945 - RT949 1RT951 - RT955 1RT966 - RT967 1RU001 - RU006 1RU016 - RU017 1RU031 - RU032 1RU051 - RU052 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 15 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 16 GroupVariable Number 1RU059 - RU062 1RU081 - RU083 GroupVariable Number 1RU101 1RU801 - RU809 GroupVariable Number 1RU831 - RU841 -- 2. Spares Affected Examine your spares supply for the parts or components identified below. If any parts or components are found, refer to Paragraph 3.B., Work Instructions for the recommended action. Part Number 3A090-0027-01-1 3A090-0028-01-1 3A090-0055-01-1 3A090-0056-01-1 3A090-0065-01-1 3A090-0066-01-1 3A090-0075-01-1 3A090-0076-01-1 3A090-0079-01-1 3A090-0080-01-1 3A090-0081-01-1 3A090-0082-01-1 3A258-0041-01-1 3A258-0042-01-1 B. Concurrent Requirements The service bulletin(s) listed below must be done before or at the same time as this service bulletin: DescriptionService BulletinCompany Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 097-25-04 Issue 2 or Issue 3 Ipeco Holdings Ltd (a)(b) Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 097-25-03 Issue 2 or Issue 3 (a)(b) Ipeco Holdings Ltd Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 107-25-05 Issue 3 or Issue 4 Ipeco Holdings Ltd (c)(d) Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 16 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 17 DescriptionService BulletinCompany Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 107-25-04 Issue 3 or Issue 4 (c)(d) Ipeco Holdings Ltd Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 112-25-04 Issue 2 or Issue 3 Ipeco Holdings Ltd (e)(f) Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 112-25-03 Issue 2 or Issue 3 (e)(f) Ipeco Holdings Ltd Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 209-25-04 Issue 2 or Issue 3 Ipeco Holdings Ltd (g)(h) Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 209-25-03 Issue 2 or Issue 3 (g)(h) Ipeco Holdings Ltd Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 211-25-06 Issue 2 or Issue 3 Ipeco Holdings Ltd (i)(j) Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 211-25-05 Issue 2 or Issue 3 (i)(j) Ipeco Holdings Ltd Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 212-25-06 Issue 2 or Issue 3 Ipeco Holdings Ltd (k)(l) Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 212-25-05 Issue 2 or Issue 3 (k)(l) Ipeco Holdings Ltd Captain's and First Officer's seat horizontal movement system inspection and overhaul. Ipeco SB 258-25-14, Issue 4 or Issue 5 Ipeco Holdings Ltd (m)(n) Captain's and First Officer's seat horizontal movement system inspection and adjust- ment. Ipeco SB 258-25-13 Issue 3 or Issue 4 or Issue 5 (m)(n) Ipeco Holdings Ltd (a) Applicable to Captain's seat part number 3A090-0027-01-1. (b) Applicable to First Officer's seat part number 3A090-0028-01-1. (c) Applicable to Captain's seat part number 3A090-0055-01-1. (d) Applicable to First Officer's seat part number 3A090-0056-01-1. (e) Applicable to Captain's seat part number 3A090-0065-01-1. (f) Applicable to First Officer's seat part number 3A090-0066-01-1. (g) Applicable to Captain's seat part number 3A090-0075-01-1. (h) Applicable to First Officer's seat part number 3A090-0076-01-1. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 17 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 18 DescriptionService BulletinCompany (i) Applicable to Captain's seat part number 3A090-0079-01-1. (j) Applicable to First Officer's seat part number 3A090-0080-01-1. (k) Applicable to Captain's seat part number 3A090-0081-01-1. (l) Applicable to First Officer's seat part number 3A090-0082-01-1. (m) Applicable to Captain's seat part number 3A258-0041-01-1. (n) Applicable to First Officer's seat part number 3A258-0042-01-1. C. Reason Accomplishment of this service bulletin will decrease the risk that the Captain's and First Officer's seats will have un-commanded seat movement because of horizontal actuator shaft failure. If this service bulletin is not done, the output shaft of the horizontal actuator on the Captain's and First Officer's seat(s) could break and cause an un-commanded seat movement. Un-commanded seat movement could lead to reduced controllability of the airplane. An operator reported the Captain's seat could not be locked in position after the horizontal position of the seat was adjusted in flight. The seat became unlocked from the track and moved freely forward and aft. Control was given to the First Officer for approach and landing. An inspection found the horizontal actuator output shaft had broken. When the horizontal actuator output shaft breaks, pilot's cannot prevent seat movement in a forward and aft direction and cannot lock the seat in position. A broken shaft is the result of high loads, that are more than design limits, from a stalled motor, that can occur due to high mechanical resistance to motion during powered operation of the seat. Any object that can potentially impede seat movement (Foreign Object Debris (FOD)) in the seat tracks is another condition that can result in a stalled motor and cause the horizontal actuator output shaft to break. This service bulletin gives instructions for airplanes with powered Ipeco part number series 3A090 Captain's seat or First Officer's seat installed, corrective actions are necessary by an off-airplane inspection of each seat by the applicable Ipeco service bulletin. Repeat on-airplane checks, at intervals not to exceed 36 months, are necessary for the Captain's and First Officer's seats by the applicable Ipeco service bulletin. This service bulletin gives instructions for airplanes with powered Ipeco part number series 3A258 Captain's seat or First Officer's seat installed, to find the part number and 'amendment' of the horizontal actuator of the Horizontal Movement System (HMS). If the horizontal actuator has Artus part number AD8650503 at 'Amendment B' or earlier or Artus part number AD8650502, corrective actions are necessary by an off-airplane inspection of each seat by the applicable Ipeco service bulletin, where signs of damage to the HMS make the replacement of the horizontal actuator necessary. If the actuator continues to be Artus part number AD8650503 at 'Amendment B' or earlier or Artus part number AD8650502, repeat on-airplane inspections are necessary for the Captain's and First Officer's seats by the applicable Ipeco service bulletin. Installation of a horizontal actuator, Artus part number AD8650503 at 'Amendment C' or later, will significantly decrease the risk of a broken horizontal actuator output shaft. Boeing Service Related Problem (SRP) 747-SRP-25-0306 and 747-SRP-25-0418 are related to this service bulletin. Boeing Fleet Team Digest (FTD) 747 FTD 25-12003 is related to this service bulletin. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 18 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 19 Revision 1 was sent to add more information and to better describe the conditions of and the serviceable definition for Ipeco pilot's seats. Also, the newest issue numbers of the Ipeco service bulletins, which correct errors in their work instructions, are specified in this revision. Revision 2 is sent to give the newest issue of each concurrent supplier service bulletin and to change the effectivity of this service bulletin to be for delivered airplanes from line number 669 to 1526, and to add airplanes to effectivity of this service bulletin. Also, added option to install a serviceable seat for the Captain's and First Officer's seats. Compliance tasks for added airplanes are given a new compliance time. D. Description Do inspections and checks of the Captain's and First Officer's seats. Do corrective actions. Effects of this Revision on airplanes on which the Original Issue or Revision 1 was previously done: None. The work in this service bulletin is done in the maintenance zone(s) given below. Group 1: Affected Maintenance Zones ZoneModel 221, 222747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747-8, 747-8F Group 2: Affected Maintenance Zones ZoneModel 221, 222747-400F, 747-8 E. Compliance Federal Aviation Administration (FAA) Airworthiness Directive AD 2019-22-02 is related to this service bulletin. The effective date of AD 2019-22-02 is January 16, 2020. The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory. Accomplish the required action(s), based on the applicable condition(s) in Table(s) 1 thru 12, in accordance with Paragraph 3. Accomplishment Instructions. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION number or an OPTION number, do all the ACTION numbers for that CONDITION number or OPTION number. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 19 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 20 Group 1, Configuration 1, 3: Table 1: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the Original Issue date of this service bulletin. Do PART 1: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM DE- TAILED INSPECTION. All Airplanes. -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 5. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 5. -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 1 was done.OPTION 1 (ACTION 2): DoPART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (a) At the times speci- fied in Table 5. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 5. -Before further flight.OPTION 2 (ACTION 1): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (a) At the times speci- fied in Table 5. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 5. (a) It is permitted to install a spare seat that has passed PART 1 or done PART 3. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 20 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 21 Group 1, Configuration 1-2: Table 2: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the Original Issue date of this service bulletin. Do PART 2: FIRST OFFI- CER'S SEAT - HORIZON- TAL MOVEMENT SYSTEM DETAILED INSPECTION. All Airplanes. -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 6. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 6. -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 2 was done.OPTION 1 (ACTION 2): DoPART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (a) At the times speci- fied in Table 6. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 6. -Before further flight.OPTION 2 (ACTION 1): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (a) At the times speci- fied in Table 6. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 6. (a) It is permitted to install a spare seat that has passed PART 2 or done PART 4. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 21 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 22 Group 1, Configuration 2, 4: Table 3: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the Original Issue date of this service bulletin. Do PART 5: CAPTAIN'S SEAT, PART NUMBER SE- RIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICA- TION. All Airplanes. -Before further flight.CONDITION 3 (ACTION1): Make sure the seat tracks are clear of FOD. CONDITION 3: THE HORIZON- TAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER -CONDITION 3 (ACTION 2): No further action required. (a) -Within 36 months after the Original Issue date of this service bulletin. OPTION 1: Do PART 1: CAPTAIN'S SEAT - HORI- ZONTAL MOVEMENT SYS- TEM DETAILED INSPEC- TION. CONDITION 4: THE HORIZON- TAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTU- ATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND OPTION 2: Install a service- able seat. (a) -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 7. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 7. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 22 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 23 Group 1, Configuration 2, 4: Table 3: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 1 was done.OPTION 1 (ACTION 2): DoPART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (b) At the times speci- fied in Table 7. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 7. -Before further flight.OPTION 2 (ACTION 1): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (b) At the times speci- fied in Table 7. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 7. -Before further flight.OPTION 3: Install a service- able seat. (a) (a) Terminating Action: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General In- formation, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. (b) It is permitted to install a spare seat that has passed PART 1 or done PART 3. Group 1, Configuration 3-4: Table 4: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the Original Issue date of this service bulletin. Do PART 6: FIRST OFFI- CER'S SEAT, PART NUM- BER SERIES 3A258 - HOR- IZONTAL ACTUATOR IDENTIFICATION. All Airplanes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 23 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 24 Group 1, Configuration 3-4: Table 4: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.CONDITION 3 (ACTION1): Make sure the seat tracks are clear of FOD. CONDITION 3: THE HORIZON- TAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER -CONDITION 3 (ACTION 2): No further action required. (a) -Within 36 months after the Original Issue date of this service bulletin. OPTION 1: Do PART 2: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED IN- SPECTION. CONDITION 4: THE HORIZON- TAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTU- ATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND OPTION 2: Install a service- able seat. (a) -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 8. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 8. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 24 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 25 Group 1, Configuration 3-4: Table 4: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 2 was done.OPTION 1 (ACTION 2): DoPART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (b) At the times speci- fied in Table 8. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 8. -Before further flight.OPTION 2 (ACTION 1): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (b) At the times speci- fied in Table 8. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 8. -Before further flight.OPTION 3: Install a service- able seat. (a) (a) Terminating Action: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. (b) It is permitted to install a spare seat that has passed PART 2 or done PART 4. Group 1, Configuration 1, 3; Group 2, Configuration 1, 3: Table 5: WORK PACKAGE 5 - CAPTAIN'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition 36 months.Within 36 months after WORK PACKAGE 1 was accomplished. Do PART 7: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION. All airplanes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 25 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 26 Group 1, Configuration 1-2; Group 2, Configuration 1-2: Table 6: WORK PACKAGE 6 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition 36 months.Within 36 months after WORK PACKAGE 2 was accomplished. Do PART 8: FIRST OFFI- CER'S SEAT - HORIZON- TAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE AC- TION. All airplanes. Group 1, Configuration 2, 4; Group 2, Configuration 2, 4: Table 7: WORK PACKAGE 7 - CAPTAIN'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDEN- TIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition 36 months. (a)Within 36 months after WORK PACKAGE 3 was accomplished. Do PART 5: CAPTAIN'S SEAT, PART NUMBER SE- RIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICA- TION. All airplanes. -Before further flight.CONDITION 3 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 3: THE HORIZON- TAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER --CONDITION 3 (ACTION 2): No further action required. (a) -Before further flight.OPTION 1: Do PART 7: CAPTAIN'S SEAT - HORI- ZONTAL MOVEMENT SYS- TEM ON AIRPLANE CHECKS AND CORREC- TIVE ACTION. CONDITION 4: THE HORIZON- TAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTU- ATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND OPTION 2: Install a service-able seat. (a) (a) Terminating Action: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General In- formation, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 26 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 27 Group 1, Configuration 3-4; Group 2, Configuration 3-4: Table 8: WORK PACKAGE 8 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition 36 months. (a)Within 36 months after WORK PACKAGE 4 was accomplished. Do PART 6: FIRST OFFI- CER'S SEAT, PART NUM- BER SERIES 3A258 - HOR- IZONTAL ACTUATOR IDENTIFICATION. All airplanes. -Before further flight.CONDITION 3 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 3: THE HORIZON- TAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER --CONDITION 3 (ACTION 2): No further action required. (a) -Before further flight.OPTION 1: Do PART 8: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORREC- TIVE ACTION. CONDITION 4: THE HORIZON- TAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTU- ATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND OPTION 2: Install a service-able seat. (a) (a) Terminating Action: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. Group 2, Configuration 1, 3: Table 9: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the effective date of AD 2019- 22-02. Do PART 1: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM DE- TAILED INSPECTION. All Airplanes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 27 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 28 Group 2, Configuration 1, 3: Table 9: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 5. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 5. -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 1 was done.OPTION 1 (ACTION 2): DoPART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (a) At the times speci- fied in Table 5. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 5. -Before further flight.OPTION 2 (ACTION 1): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (a) At the times speci- fied in Table 5. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 5. (a) It is permitted to install a spare seat that has passed PART 1 or done PART 3. Group 2, Configuration 1-2: Table 10: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the effective date of AD 2019- 22-02. Do PART 2: FIRST OFFI- CER'S SEAT - HORIZON- TAL MOVEMENT SYSTEM DETAILED INSPECTION. All Airplanes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 28 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 29 Group 2, Configuration 1-2: Table 10: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 6. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 6. -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 2 was done.OPTION 1 (ACTION 2): DoPART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (a) At the times speci- fied in Table 6. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 6. -Before further flight.OPTION 2 (ACTION 1): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (a) At the times speci- fied in Table 6. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 6. (a) It is permitted to install a spare seat that has passed PART 2 or done PART 4. Group 2, Configuration 2, 4: Table 11: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the effective date of AD 2019- 22-02. Do PART 5: CAPTAIN'S SEAT, PART NUMBER SE- RIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICA- TION. All Airplanes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 29 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 30 Group 2, Configuration 2, 4: Table 11: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.CONDITION 3 (ACTION1): Make sure the seat tracks are clear of FOD. CONDITION 3: THE HORIZON- TAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER -CONDITION 3 (ACTION 2): No further action required. (a) -Within 36 months after the effective date of AD 2019- 22-02. OPTION 1: Do PART 1: CAPTAIN'S SEAT - HORI- ZONTAL MOVEMENT SYS- TEM DETAILED INSPEC- TION. CONDITION 4: THE HORIZON- TAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTU- ATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND OPTION 2: Install a service- able seat. (a) -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 7. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 7. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 30 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 31 Group 2, Configuration 2, 4: Table 11: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 1 was done.OPTION 1 (ACTION 2): DoPART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (b) At the times speci- fied in Table 7. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 7. -Before further flight.OPTION 2 (ACTION 1): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVE- MENT SYSTEM OFF AIR- PLANE OVERHAUL. (b) At the times speci- fied in Table 7. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 7. -Before further flight.OPTION 3: Install a service- able seat. (a) (a) Terminating Action: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General In- formation, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. (b) It is permitted to install a spare seat that has passed PART 1 or done PART 3. Group 2, Configuration 3-4: Table 12: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 36 months after the effective date of AD 2019- 22-02. Do PART 6: FIRST OFFI- CER'S SEAT, PART NUM- BER SERIES 3A258 - HOR- IZONTAL ACTUATOR IDENTIFICATION. All Airplanes. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 31 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 32 Group 2, Configuration 3-4: Table 12: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.CONDITION 3 (ACTION1): Make sure the seat tracks are clear of FOD. CONDITION 3: THE HORIZON- TAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER -CONDITION 3 (ACTION 2): No further action required. (a) -Within 36 months after the effective date of AD 2019- 22-02. OPTION 1: Do PART 2: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED IN- SPECTION. CONDITION 4: THE HORIZON- TAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTU- ATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND OPTION 2: Install a service- able seat. (a) -Before further flight.CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) CONDITION 1 (ACTION 2): Install seat. At the times speci- fied in Table 8. -CONDITION 1 (ACTION 3): Do the repeat actions in ac- cordance with Work Pack- age 8. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 32 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 33 Group 2, Configuration 3-4: Table 12: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Before further flight.OPTION 1 (ACTION 1): In- stall seat without power. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) -Within 120 days afterPART 2 was done.OPTION 1 (ACTION 2): DoPART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (b) At the times speci- fied in Table 8. -OPTION 1 (ACTION 3): Do the repeat actions in accor- dance with Work Package 8. -Before further flight.OPTION 2 (ACTION 1): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL. (b) At the times speci- fied in Table 8. -OPTION 2 (ACTION 2): Do the repeat actions in accor- dance with Work Package 8. -Before further flight.OPTION 3: Install a service- able seat. (a) (a) Terminating Action: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. (b) It is permitted to install a spare seat that has passed PART 2 or done PART 4. F. Approval This service bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this service bulletin comply with the applicable regulations and are FAA approved, as well as European Union Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in the service bulletin effectivity. This service bulletin and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other approved Boeing changes. If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this service bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this service bulletin. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 33 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 34 In addition, the manager of the FAA Seattle ACO Branch approves accomplishment of the inspections and checks defined in SB 747-25-3653, Revision 2 as an alternative method of compliance to accomplishing inspections and checks required by paragraphs (g) and (j) of AD 2019-22-02. All provisions of AD 2019-22-02 that are not specifically referenced in the above statement remain fully applicable and must be complied with accordingly. G. Manpower The tables below show an estimate of the task hours necessary to do this service bulletin for each airplane. This estimate is for direct labor only, done by an experienced crew. Adjust the estimate with operator task hour data if necessary. The estimate does not include lost time. These are some examples of lost time: • Time to adjust to the workplace • Time to schedule the work • Time to inspect the work • Time to cure the materials • Time to make the parts • Time to find the tools. Group 1, Configuration 1, 3; Group 2, Configuration 1, 3: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access 0.400.802Seat Removal 0.300.301Seat Power Adjust- ment System Deacti- vation (a) 0.200.201FIGURE 1 0.601.202Seat Installation 0.500.501Operational Test 0.250.251Close Access (b)(b)TOTAL FOR EACH AIRPLANE (a) Applicable to Condition 2 Option 1. (b) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Group 1, Configuration 1-2; Group 2, Configuration 1-2: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 34 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 35 Group 1, Configuration 1-2; Group 2, Configuration 1-2: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.400.802Seat Removal 0.300.301Seat Power Adjust- ment System Deacti- vation (a) 0.200.201FIGURE 2 0.601.202Seat Installation 0.500.501Operational Test 0.250.251Close Access (b)(b)TOTAL FOR EACH AIRPLANE (a) Applicable to Condition 2 Option 1. (b) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Group 1, Configuration 2, 4; Group 2, Configuration 2, 4: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DE- TAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access 0.250.251Find the Part Num- ber and Amendment of the Horizontal Ac- tuator 0.200.201FIGURE 1 0.400.802Seat Removal 0.300.301Seat Power Adjust- ment System Deacti- vation (a) 0.601.202Seat Installation 0.500.501Operational Test 0.250.251Close Access (b)(b)TOTAL FOR EACH AIRPLANE (a) Applicable to Condition 2 Option 1. (b) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 35 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 36 Group 1, Configuration 3-4; Group 2, Configuration 3-4: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access 0.250.251Find the Part Num- ber and Amendment of the Horizontal Ac- tuator 0.200.201FIGURE 2 0.400.802Seat Removal 0.300.301Seat Power Adjust- ment System Deacti- vation (a) 0.601.202Seat Installation 0.500.501Operational Test 0.250.251Close Access (b)(b)TOTAL FOR EACH AIRPLANE (a) Applicable to Condition 2 Option 1. (b) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Group 1, Configuration 1, 3; Group 2, Configuration 1, 3: WORK PACKAGE 5 - CAPTAIN'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access 0.200.201FIGURE 1 0.250.251Close Access (a)(a)TOTAL FOR EACH AIRPLANE (a) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Group 1, Configuration 1-2; Group 2, Configuration 1-2: WORK PACKAGE 6 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - CHECK OF THE HORI- ZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 36 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 37 Group 1, Configuration 1-2; Group 2, Configuration 1-2: WORK PACKAGE 6 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - CHECK OF THE HORI- ZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.200.201FIGURE 2 0.250.251Close Access (a)(a)TOTAL FOR EACH AIRPLANE (a) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Group 1, Configuration 2, 4; Group 2, Configuration 2, 4: WORK PACKAGE 7 - CAPTAIN'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access 0.250.251Find the Part Num- ber and Amendment of the Horizontal Ac- tuator 0.200.201FIGURE 1 0.400.802Seat Removal (a) 0.601.202Seat Installation (a) 0.500.501Operational Test (a) 0.250.251Close Access (b)(b)TOTAL FOR EACH AIRPLANE (a) Applicable to Condition 4 Option 2. (b) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. Group 1, Configuration 3-4; Group 2, Configuration 3-4: WORK PACKAGE 8 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUA- TOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.250.251Open Access 0.250.251Find the Part Num- ber and Amendment of the Horizontal Ac- tuator 0.200.201FIGURE 2 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 37 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 38 Group 1, Configuration 3-4; Group 2, Configuration 3-4: WORK PACKAGE 8 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUA- TOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM Elapsed HoursTask HoursNumber of PersonsTask 0.400.802Seat Removal (a) 0.601.202Seat Installation (a) 0.500.501Operational Test (a) 0.250.251Close Access (b)(b)TOTAL FOR EACH AIRPLANE (a) Applicable to Condition 4 Option 2. (b) A total is not given as task usage is variable. Add the values of the applicable tasks together to get the total. The time to do the work of Part 1, Part 2, Part 3, Part 4, Part 7 and Part 8 in accordance with the applicable Ipeco service bulletin(s) is not included in the manpower estimate. H. Weight and Balance Changes None. I. Electrical Load Data Not changed. J. References 1. Existing Data: a. Engineering Change Memo PRR 86900-26R, PRR 85901-136S b. Boeing Service Related Problem (SRP) 747-SRP-25-0306, 747-SRP-25-0418 c. Federal Aviation Administration (FAA) Airworthiness Directive (AD) 2019-22-02 d. Service Bulletin Index D6-30300 e. 747 Fleet Team Digest (FTD) 25-12003 f. 747 Master Minimum Equipment List (MMEL) 25-11-01-01 g. 747-100/200/300 Aircraft Maintenance Manual (AMM) 25-11-01 h. 747-400 Aircraft Maintenance Manual (AMM) 25-11-00, 25-11-01 i. 747-8 Aircraft Maintenance Manual (AMM) 25-11-00, 25-11-01 j. Ipeco Component Maintenance Manual CMM 25-11-38 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 38 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 39 k. Ipeco Service Bulletin 097-25-03, 097-25-04, 107-25-04, 107-25-05, 112-25-03, 112-25-04, 209-25-03, 209-25-04, 211-25-05, 211-25-06, 212-25-05, 212-25-06, 258-25-13, 258-25-14 NOTE: The supplier was advised to send copies of the service bulletin to each operator. 2. Data Supplied with this Service Bulletin: None. 3. Installation Drawings Used in the Preparation of this Service Bulletin: None. K. Publications Affected 1. Publications: Chapter-SectionPublication 25-11747-100/200/300 Illustrated Parts Catalog 11-11, 25-11747-400 Illustrated Parts Catalog 11-11, 25-11747-8 Illustrated Parts Catalog 25-11747-100/200/300 Maintenance Planning Data 25-11747-400 Maintenance Planning Data 25-11747-8 Maintenance Planning Data 2. Damage Tolerance Based Structural Inspections: Boeing has evaluated the repairs and/or changes in this service bulletin for effects on Fatigue Critical Structure (FCS) and for changes to Damage Tolerance Inspections (DTI) required in the Maintenance Program. This service bulletin does not affect FCS, therefore DTIs are not necessary. L. Interchangeability and Intermixability of Parts Accomplishment of this service bulletin does not affect interchangeability or intermixability of parts. M. Software Accomplishment Summary Not affected. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 39 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 40 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 40 of 95 BOEING SERVICE BULLETIN 747-25-3653 BLANK PAGE ### Page 41 2. MATERIAL INFORMATION A. Material - Price and Availability The operator can supply the parts and materials shown in Paragraph 2.C., Parts Necessary for Each Airplane. Refer to Ipeco SB 097-25-04, Ipeco SB 107-25-05, Ipeco SB 112-25-04, Ipeco SB 209-25-04, Ipeco SB 211-25-06, Ipeco SB 212-25-06 or Ipeco SB 258-25-14. B. Industry Support Information Boeing warranty remedies are not available for the inspection and/or repair procedures given in this service bulletin. C. Parts Necessary for Each Airplane 1. Kits/Parts None. 2. Parts and Materials Supplied by the Operator The following parts or materials are necessary to do the change in this service bulletin. Parts and materials in the manuals given in Paragraph 1.J., References, can also be necessary. Examine operator part and material supply to make sure all necessary parts and materials are available. Group 1, Configuration 2-4; Group 2, Configuration 2-4: NotesExisting Ipeco Part Num- ber NameQTYIpeco Part Num- ber (a)(b)(c)(d)3A258-0041-01-1SEAT ASSEMBLY - CAPTAIN13A258-0041-01-2 (a)(b)(c)(d)3A258-0042-01-1SEAT ASSEMBLY - FIRST OFFI- CER 13A258-0042-01-2 (a) Refer to Ipeco SB 258-25-14. (b) This part is used in production. (c) A new seat assembly is an alternative to the accomplishment of the applicable Ipeco service bulletin. (d) This part number of new seat assembly has horizontal actuator, Artus part number AD8650503 (Ipeco part number 2A258-0487), at 'Amendment C' or later, installed. 3. Parts Modified and Reidentified The parts shown below are changed as shown in this service bulletin. The quantity (QTY) is the number of parts changed on each airplane. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 41 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 42 Group 1, Configuration 1-3; Group 2, Configuration 1-3: NotesNew Ipeco Part Number NameQTYExisting Ipeco Part Number (a)(i)-SEAT ASSEMBLY - CAPTAIN 13A090-0027-01-1 (b)(i)-SEAT ASSEMBLY - CAPTAIN 3A090-0055-01-1 (c)(i)-SEAT ASSEMBLY - CAPTAIN 3A090-0065-01-1 (d)(i)-SEAT ASSEMBLY - CAPTAIN 3A090-0075-01-1 (e)(i)-SEAT ASSEMBLY - CAPTAIN 3A090-0079-01-1 (f)(i)-SEAT ASSEMBLY - CAPTAIN 3A090-0081-01-1 (a)(i)-SEAT ASSEMBLY - FIRST OFFICER 13A090-0028-01-1 (b)(i)-SEAT ASSEMBLY - FIRST OFFICER 3A090-0056-01-1 (c)(i)-SEAT ASSEMBLY - FIRST OFFICER 3A090-0066-01-1 (d)(i)-SEAT ASSEMBLY - FIRST OFFICER 3A090-0076-01-1 (e)(i)-SEAT ASSEMBLY - FIRST OFFICER 3A090-0080-01-1 (f)(i)-SEAT ASSEMBLY - FIRST OFFICER 3A090-0082-01-1 (a) Make the change in accordance with Ipeco SB 097-25-04. (b) Make the change in accordance with Ipeco SB 107-25-05. (c) Make the change in accordance with Ipeco SB 112-25-04. (d) Make the change in accordance with Ipeco SB 209-25-04. (e) Make the change in accordance with Ipeco SB 211-25-06. (f) Make the change in accordance with Ipeco SB 212-25-06. (g) Make the change in accordance with Ipeco SB 258-25-14. (h) This part is not used in production. (i) The Ipeco part number (and Boeing part number) does not change. Identify on the part that the change done in accordance with this service bulletin was made. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 42 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 43 Group 1, Configuration 2-4; Group 2, Configuration 2-4: NotesNew Ipeco Part Number NameQTYExisting Ipeco Part Number (a)(b)(c)3A258-0041-01-1ZSEAT ASSEMBLY - CAPTAIN 13A258-0041-01-1 (a)(b)(c)3A258-0042-01-1ZSEAT ASSEMBLY - FIRST OFFICER 13A258-0042-01-1 (a) Make the change in accordance with Ipeco SB 258-25-14. (b) This part is not used in production. (c) The Captain's and First Officer's seat is only changed into the new part number if the hori- zontal actuator AD8650503 at amendment C or later, or part 2A258-0487 is installed. 4. Parts Removed and Not Replaced None. D. Parts Necessary to Change Spares Refer to Ipeco SB 097-25-04, Ipeco SB 107-25-05, Ipeco SB 112-25-04, Ipeco SB 209-25-04, Ipeco SB 211-25-06, Ipeco SB 212-25-06 or Ipeco SB 258-25-14. E. Special Tooling - Price and Availability Refer to Ipeco SB 097-25-04, Ipeco SB 107-25-05, Ipeco SB 112-25-04, Ipeco SB 209-25-04, Ipeco SB 211-25-06, Ipeco SB 212-25-06 or Ipeco SB 258-25-14. F. Special Tooling Necessary to do this Service Bulletin Refer to Ipeco SB 097-25-04, Ipeco SB 107-25-05, Ipeco SB 112-25-04, Ipeco SB 209-25-04, Ipeco SB 211-25-06, Ipeco SB 212-25-06 or Ipeco SB 258-25-14. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 43 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 44 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 44 of 95 BOEING SERVICE BULLETIN 747-25-3653 BLANK PAGE ### Page 45 3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION KEEP THE WORK AREA, WIRES AND ELECTRICAL BUNDLES CLEAN OF METAL PARTICLES OR CONTAMINATION WHEN YOU USE TOOLS. UNWANTED MATERIAL, METAL PARTICLES OR CONTAMINATION CAUGHT IN WIRE BUNDLES CAN CAUSE DAMAGE TO THE BUNDLES. DAMAGED WIRE BUNDLES CAN CAUSE SPARKS OR OTHER ELECTRICAL DAMAGE. CAUTION NOTE: 1. Manual titles are referred to by acronyms. Refer to Paragraph 1.J., References, for definition of the acronyms. 2. Obey all of the warnings and cautions given in the specified manual sections. 3. The work instructions are divided into work packages. Each work package can be completed independently during separate maintenance visits. Task Hours and Elapsed Hours for each package are given in Paragraph 1.G., Manpower. 4. Unless shown differently, these dimensions and tolerances are used: – Linear dimensions are in inches – Tolerance on linear dimensions, other than rivet and bolt edge margins, is plus or minus 0.03 inch – Tolerance on rivet and bolt edge margin is plus or minus 0.05 inch – Angular tolerance is plus or minus 2 degrees – Hole dimensions for standard solid rivets and fasteners are in Structural Repair Manual (SRM) Chapter 51 – Torque Values: — Values for structural fasteners are given in 747-200/300/400/400F/8/8F Structural Repair Manual, Chapter 51. 5. A Detailed Inspection is defined as: An intensive examination of a specific item, installation, or assembly to detect damage, failure, or irregularity. Available lighting is normally supplemented with a direct source of good lighting at an intensity deemed appropriate. Inspection aids such as mirrors, magnifying lenses, etc. may be necessary. Surface cleaning and elaborate procedures may be required. 6. These work instructions refer to procedures included in other Boeing documents. When the words "refer to" are used and the operator has an accepted alternative procedure, the accepted alternative procedure can be used. When the words "in accordance with" are included in the instruction, the procedure in the Boeing document must be used. 7. Refer to APPENDIX A, APPENDIX B, APPENDIX C, APPENDIX D, APPENDIX E, APPENDIX F, APPENDIX G, APPENDIX H, APPENDIX J, APPENDIX K, APPENDIX L and APPENDIX M for logic diagram(s). Logic diagrams are provided as an aid only. Information contained in Paragraph 1.E., Compliance is the primary source for compliance times. Information in Paragraph 3.B., Work Instructions is the primary source for tasks required for compliance. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 45 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 46 8. If it is necessary to remove more parts for access, you can remove those parts. If you can get access without removing identified parts, it is not necessary to remove all of the identified parts. Jacking and shoring limitations must be observed. 9. Use of colors in Figures is based on guidance from the ATA e-Business Program (ATA) iSpec 2200. 10. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION number or an OPTION number, do all of the ACTION numbers for that CONDITION number or OPTION number. 11. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS are in Paragraph 1.E., Compliance. 12. The CONDITIONS, ACTIONS and OPTIONS shown apply to the Captain's and First Officer's seats independently. 13. Some steps in the Work Instructions are labeled as Required for Compliance (RC). If this service bulletin is mandated by an Airworthiness Directive (AD), then the steps labeled as RC, including sub-steps under an RC step and any figures identified in an RC step, must be done to comply with the AD. If a step or sub-step is labeled "RC Exempt," then the RC requirement is removed from that step or sub-step. An Alternative Method of Compliance (AMOC) is required for any deviations to RC steps, including sub-steps and identified figures. Steps not labeled as RC may be deviated from using accepted methods in accordance with the operator's maintenance or inspection program without obtaining approval of an AMOC. This is provided that the RC steps, including sub-steps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. 14. For part number series 3A258 seats, horizontal actuator part number AD8650503 identified in the Paragraph 3.B., Work Instructions is the Artus identity. This actuator also has an Ipeco identity, which is part number 2A258-0487. 15. A serviceable Captain's seat in this service bulletin is defined as one with part number 3A258-0041-01-2 or 3A258-0041-01-1Z, or as one with part number 3A258-0041-01-1 that has a horizontal actuator with Artus part number AD8650503 at 'Amendment C' or later. Installation of a serviceable Captain's seat is a terminating action to the repeat inspections in this service bulletin. 16. A serviceable First Officer's seat in this service bulletin is defined as one with part number 3A258-0042-01-2 or 3A258-0042-01-1Z, or as one with part number 3A258-0042-01-1 that has a horizontal actuator with Artus part number AD8650503 at 'Amendment C' or later. Installation of a serviceable First Officer's seat is a terminating action to the repeat inspections in this service bulletin. 17. Foreign Object Debris (FOD) in this service bulletin is defined as coins, tools, nuts, bolts, a pen, or any object that can potentially impede seat movement. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 46 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 47 B. WORK INSTRUCTIONS Group 1, Configuration 1, 3; Group 2, Configuration 1, 3: WORK PACKAGE 1 - CAPTAIN'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 1: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED INSPECTION a. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) (1) CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (2) CONDITION 1 (ACTION 2): Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (3) CONDITION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 5. At the time specifiedParagraph 1.E., Compliance. b. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) (1) OPTION 1 (ACTION 1): Install seat without power: Seat Installation and Deactivation (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (b) Install seat that has done PART 1. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (c) Deactivate the power adjustment system of the seat in accordance with 747 Master Minimum Equipment List (MMEL) 25-11-01-01. (2) OPTION 1 (ACTION 2): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 1 or done PART 3. (3) OPTION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 5. At the time specified Paragraph 1.E., Compliance. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 47 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 48 (4) OPTION 2 (ACTION 1): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 1 or done PART 3. (5) OPTION 2 (ACTION 2): Do the repeat actions in accordance with Work Package 5. At the time specified Paragraph 1.E., Compliance. c. RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 1-2; Group 2, Configuration 1-2: WORK PACKAGE 2 - FIRST OFFICER'S SEAT - DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 2: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED INSPECTION a. CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) (1) CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (2) CONDITION 1 (ACTION 2): Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (3) CONDITION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 6. At the time specified Paragraph 1.E., Compliance. b. CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) (1) OPTION 1 (ACTION 1): Install seat without power: Seat Installation and Deactivation (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2 (b) Install seat that has done PART 2. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 48 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 49 (c) Deactivate the power adjustment system of the seat in accordance with 747 Master Minimum Equipment List (MMEL) 25-11-01-01. (2) OPTION 1 (ACTION 2): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 2 or done PART 4. (3) OPTION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 6. At the time specified Paragraph 1.E., Compliance. (4) OPTION 2 (ACTION 1): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 2 or done PART 4. (5) OPTION 2 (ACTION 2): Do the repeat actions in accordance with Work Package 6. At the time specified Paragraph 1.E., Compliance. c. RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 2, 4; Group 2, Configuration 2, 4: WORK PACKAGE 3 - CAPTAIN'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 5: CAPTAIN'S SEAT, PART NUMBER SERIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICATION a. CONDITION 3: THE HORIZONTAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER (1) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 49 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 50 b. CONDITION 4: THE HORIZONTAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTUATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND (1) OPTION 1: Do PART 1: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED INSPECTION (a) CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) 1) CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. 2) CONDITION 1 (ACTION 2): Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. 3) CONDITION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 7. At the time specified Paragraph 1.E., Compliance. (b) CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) 1) OPTION 1 (ACTION 1): Install seat without power: Seat Installation and Deactivation a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. b) Install seat that has done PART 1. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. c) Deactivate the power adjustment system of the seat in accordance with 747 Master Minimum Equipment List (MMEL) 25-11-01-01. 2) OPTION 1 (ACTION 2): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 1 or done PART 3. 3) OPTION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 7. At the time specified Paragraph 1.E., Compliance. 4) OPTION 2 (ACTION 1): Do PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 50 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 51 b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 1 or done PART 3. 5) OPTION 2 (ACTION 2): Do the repeat actions in accordance with Work Package 7. At the time specified Paragraph 1.E., Compliance. 6) OPTION 3: Install a serviceable seat: a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. b) Install a serviceable seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. (c) RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. (2) OPTION 2: Install a serviceable seat: (a) Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (b) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (c) Install a serviceable seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. (d) RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 3-4; Group 2, Configuration 3-4: WORK PACKAGE 4 - FIRST OFFICER'S SEAT - HORIZONTAL ACTUATOR IDENTIFICATION, DETAILED INSPECTION AND OVERHAUL OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 51 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 52 2. RC - Do PART 6: FIRST OFFICER'S SEAT, PART NUMBER SERIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICATION a. CONDITION 3: THE HORIZONTAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER (1) CONDITION 3 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (2) CONDITION 3 (ACTION 2): No further action required. b. CONDITION 4: THE HORIZONTAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTUATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND (1) OPTION 1: Do PART 2: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED INSPECTION (a) CONDITION 1: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS PASSED (NO FINDINGS) 1) CONDITION 1 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. 2) CONDITION 1 (ACTION 2): Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. 3) CONDITION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 8. At the time specified Paragraph 1.E., Compliance. (b) CONDITION 2: THE 'IPECO SERVICE BULLETIN, PART A - INSPECTION' IS NOT PASSED (ANY FINDINGS) 1) OPTION 1 (ACTION 1): Install seat without power: Seat Installation and Deactivation a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. b) Install seat that has done PART 2. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. c) Deactivate the power adjustment system of the seat in accordance with 747 Master Minimum Equipment List (MMEL) 25-11-01-01. 2) OPTION 1 (ACTION 2): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 52 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 53 NOTE: It is permitted to install a spare seat that has passed PART 2 or done PART 4. 3) OPTION 1 (ACTION 3): Do the repeat actions in accordance with Work Package 8. At the time specified Paragraph 1.E., Compliance. 4) OPTION 2 (ACTION 1): Do PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. b) Install seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: It is permitted to install a spare seat that has passed PART 2 or done PART 4. 5) OPTION 2 (ACTION 2): Do the repeat actions in accordance with Work Package 8. At the time specified Paragraph 1.E., Compliance. 6) OPTION 3: Install a serviceable seat: a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. b) Install a serviceable seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. (c) RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. (2) OPTION 2: Install a serviceable seat: (a) Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (b) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (c) Install a serviceable seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 53 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 54 (d) RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 1, 3; Group 2, Configuration 1, 3: WORK PACKAGE 5 - CAPTAIN'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 7 - CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION a. Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. b. Continue to do the repeat actions in accordance with Work Package 5. At the time specified Paragraph 1.E., Compliance. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 1-2; Group 2, Configuration 1-2: WORK PACKAGE 6 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - CHECK OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 8 - FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION a. Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. b. Continue to do the repeat actions in accordance with Work Package 6. At the time specified Paragraph 1.E., Compliance. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 2, 4; Group 2, Configuration 2, 4: WORK PACKAGE 7 - CAPTAIN'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 5: CAPTAIN'S SEAT, PART NUMBER SERIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICATION a. CONDITION 3: THE HORIZONTAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER (1) CONDITION 3 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 54 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 55 (2) CONDITION 3 (ACTION 2): No further action required. b. CONDITION 4: THE HORIZONTAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTUATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND (1) OPTION 1: Do PART 7 - CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (b) Do the repeat actions in accordance with Work Package 7. At the time specified Paragraph 1.E., Compliance. (2) OPTION 2: Install a serviceable seat: (a) Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (b) Make sure the seat tracks are clear of FOD in accordance with FIGURE 1. (c) Install a serviceable seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. (d) RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. 3. Put the airplane back to a serviceable condition. Group 1, Configuration 3-4; Group 2, Configuration 3-4: WORK PACKAGE 8 - FIRST OFFICER'S SEAT - REPEAT ACTIONS - HORIZONTAL ACTUATOR IDENTIFICATION AND CHECK OF THE HORIZONTAL MOVEMENT SYSTEM 1. Get access to the flight compartment. 2. RC - Do PART 6: FIRST OFFICER'S SEAT, PART NUMBER SERIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICATION a. CONDITION 3: THE HORIZONTAL ACTUATOR IS PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER (1) CONDITION 3 (ACTION 1): Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (2) CONDITION 3 (ACTION 2): No further action required. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 55 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 56 b. CONDITION 4: THE HORIZONTAL ACTUATOR IS NOT PART NUMBER AD8650503 AT 'AMENDMENT C' OR LATER, OR THE HORIZONTAL ACTUATOR PART NUMBER AND AMENDMENT CANNOT BE FOUND (1) OPTION 1: Do PART 8 - FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION (a) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (b) Do the repeat actions in accordance with Work Package 8. At the time specified Paragraph 1.E., Compliance. (2) OPTION 2: Install a serviceable seat: (a) Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. (b) Make sure the seat tracks are clear of FOD in accordance with FIGURE 2. (c) Install a serviceable seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. (d) RC Exempt - Do the electrical operational check of the seat. Refer to 747-100/200/300 AMM 25-11-01 as an accepted procedure. Or, do the Flight Compartment Seats Operational Test. Refer to 747-400 AMM 25-11-00 or 747-8 AMM 25-11-00 as an accepted procedure. 3. Put the airplane back to a serviceable condition. PART 1: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED INSPECTION 1. RC Exempt - Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Some of the inspections detailed in the Ipeco service bulletins do not require the seat to be removed. 2. Do the detailed inspections from the 'Ipeco service bulletin Part A - Inspection' for findings specified in, and in accordance with the applicable Ipeco service bulletin in the table below, for the seat: IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 097-25-04(a)S232T303-3333A090-0027-01-1 Ipeco SB 107-25-05(a)S232T303-3533A090-0055-01-1 Ipeco SB 112-25-04(a)S232T303-3633A090-0065-01-1 Ipeco SB 209-25-04(a)S232T303-4333A090-0075-01-1 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 56 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 57 IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 211-25-06(a)S232T303-4533A090-0079-01-1 Ipeco SB 212-25-06(a)S232T303-4633A090-0081-01-1 Ipeco SB 258-25-14(a)S232T311-1033A258-0041-01-1 (a) In accordance with the applicable Ipeco service bulletin issue listed in Paragraph 1.B., Concurrent Require- ments. PART 2: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM DETAILED INSPECTION 1. RC Exempt - Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. NOTE: Some of the inspections detailed in the Ipeco service bulletins do not require the seat to be removed. 2. Do the detailed inspections from the 'Ipeco service bulletin Part A - Inspection' for findings specified in, and in accordance with the applicable Ipeco service bulletin in the table below, for the seat: IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 097-25-04(a)S232T303-3343A090-0028-01-1 Ipeco SB 107-25-05(a)S232T303-3543A090-0056-01-1 Ipeco SB 112-25-04(a)S232T303-3643A090-0066-01-1 Ipeco SB 209-25-04(a)S232T303-4343A090-0076-01-1 Ipeco SB 211-25-06(a)S232T303-4543A090-0080-01-1 Ipeco SB 212-25-06(a)S232T303-4643A090-0082-01-1 Ipeco SB 258-25-14(a)S232T311-1043A258-0042-01-1 (a) In accordance with the applicable Ipeco service bulletin issue listed in Paragraph 1.B., Concurrent Require- ments. PART 3: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL 1. Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. 2. Do the applicable Ipeco service bulletin in the table below, for the seat: IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 097-25-04(a)S232T303-3333A090-0027-01-1 Ipeco SB 107-25-05(a)S232T303-3533A090-0055-01-1 Ipeco SB 112-25-04(a)S232T303-3633A090-0065-01-1 Ipeco SB 209-25-04(a)S232T303-4333A090-0075-01-1 Ipeco SB 211-25-06(a)S232T303-4533A090-0079-01-1 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 57 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 58 IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 212-25-06(a)S232T303-4633A090-0081-01-1 Ipeco SB 258-25-14(a)S232T311-1033A258-0041-01-1 (a) In accordance with the applicable Ipeco service bulletin issue listed in Paragraph 1.B., Concurrent Require- ments. PART 4: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM OFF AIRPLANE OVERHAUL 1. Remove seat. Refer to 747-100/200/300 AMM 25-11-01, 747-400 AMM 25-11-01 or 747-8 AMM 25-11-01 as an accepted procedure. 2. Do the applicable Ipeco service bulletin in the table below, for the seat: IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 097-25-04(a)S232T303-3343A090-0028-01-1 Ipeco SB 107-25-05(a)S232T303-3543A090-0056-01-1 Ipeco SB 112-25-04(a)S232T303-3643A090-0066-01-1 Ipeco SB 209-25-04(a)S232T303-4343A090-0076-01-1 Ipeco SB 211-25-06(a)S232T303-4543A090-0080-01-1 Ipeco SB 212-25-06(a)S232T303-4643A090-0082-01-1 Ipeco SB 258-25-14(a)S232T311-1043A258-0042-01-1 (a) In accordance with the applicable Ipeco service bulletin issue listed in Paragraph 1.B., Concurrent Require- ments. Group 1, Configuration 2, 4; Group 2, Configuration 2, 4: PART 5: CAPTAIN'S SEAT, PART NUMBER SERIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICATION 1. Find the Artus part number and amendment of the horizontal actuator that is installed on the seat. a. Captain's seat part numbers 3A258-0041-01-2 and 3A258-0041-01-1Z have a horizontal actuator with Artus part number AD8650503 at 'Amendment C' or later. For Captain's seats with other part numbers, maintenance records can be used if the part number and Amendment of the horizontal actuator can be identified. If maintenance records are not available or the part number and Amendment cannot be identified from maintenance records, inspect to find the part number and Amendment of the horizontal actuator installed on the seat. Refer to APPENDIX I. NOTE: Installation of a serviceable Captain's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the Captain's seat in accordance with this service bulletin. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 58 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 59 Group 1, Configuration 3-4; Group 2, Configuration 3-4: PART 6: FIRST OFFICER'S SEAT, PART NUMBER SERIES 3A258 - HORIZONTAL ACTUATOR IDENTIFICATION 1. Find the Artus part number and amendment of the horizontal actuator that is installed on the seat. a. First Officer's seat part numbers 3A258-0042-01-2 and 3A258-0042-01-1Z have a horizontal actuator with Artus part number AD8650503 at 'Amendment C' or later. For Captain's seats with other part numbers, maintenance records can be used if the part number and Amendment of the horizontal actuator can be identified. If maintenance records are not available or the part number and Amendment cannot be identified from maintenance records, inspect to find the part number and Amendment of the horizontal actuator installed on the seat. Refer to APPENDIX I. NOTE: Installation of a serviceable First Officer's seat as defined in Paragraph 3.A., General Information, is a terminating action to the repeat inspections for the First Officer's seat in accordance with this service bulletin. PART 7: CAPTAIN'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION 1. Do the checks and applicable corrective actions in accordance with the applicable Ipeco service bulletin in the table below, for the seat: IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 097-25-03(a)S232T303-3333A090-0027-01-1 Ipeco SB 107-25-04(a)S232T303-3533A090-0055-01-1 Ipeco SB 112-25-03(a)S232T303-3633A090-0065-01-1 Ipeco SB 209-25-03(a)S232T303-4333A090-0075-01-1 Ipeco SB 211-25-05(a)S232T303-4533A090-0079-01-1 Ipeco SB 212-25-05(a)S232T303-4633A090-0081-01-1 Ipeco SB 258-25-13(a)S232T311-1033A258-0041-01-1 (a) In accordance with the applicable Ipeco service bulletin issue listed in Paragraph 1.B., Concurrent Require- ments. PART 8: FIRST OFFICER'S SEAT - HORIZONTAL MOVEMENT SYSTEM ON AIRPLANE CHECKS AND CORRECTIVE ACTION 1. Do the checks and applicable corrective actions in accordance with the applicable Ipeco service bulletin in the table below, for the seat: IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 097-25-03(a)S232T303-3343A090-0028-01-1 Ipeco SB 107-25-04(a)S232T303-3543A090-0056-01-1 Ipeco SB 112-25-03(a)S232T303-3643A090-0066-01-1 Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 59 of 95 BOEING SERVICE BULLETIN 747-25-3653 ### Page 60 IPECO SERVICE BULLETINBOEING PART NUMBERIPECO PART NUMBER Ipeco SB 209-25-03(a)S232T303-4343A090-0076-01-1 Ipeco SB 211-25-05(a)S232T303-4543A090-0080-01-1 Ipeco SB 212-25-05(a)S232T303-4643A090-0082-01-1 Ipeco SB 258-25-13(a)S232T311-1043A258-0042-01-1 (a) In accordance with the applicable Ipeco service bulletin issue listed in Paragraph 1.B., Concurrent Require- ments. Export Controlled ECCN: 9E991 Copyright © Unpublished Work - See page 1 for details. Original Issue: August 04, 2017 747-25-3653Revision 2: January 27, 2023 60 of 95 BOEING SERVICE BULLETIN 747-25-3653 The text continues at https://openairdocs.org/service-documents/boeing/sb-747-25-3653/file/0d2ea2a0c41a.md?from=61 --- OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. 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