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Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION Number: 747-25-3653 Original Issue: August 04, 2017 Revision 1: October 19, 2018 ATA System: 2511 SUBJECT: EQUIPMENT/FURNISHINGS - Flight Compartment Seats - Captain's and First Officer's Seats - Horizontal Movement System Inspection and Overhaul Export of this technology is controlled under the United States Export Administration Regulations (EAR) (15 CFR 300-774). An export license may be required before it is used for development, production or use by foreign persons from specific countries. The controller of this data has the individual responsibility to abide by all export laws.
9E991ECCN:
BOEING PROPRIETARY, CONFIDENTIAL AND/OR TRADE SECRET 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Unpublished Work.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 1: October 19, 2018 1 of 76
2.0
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
Original Issue: August 04, 2017 747-25-3653Revision 1: October 19, 2018 2 of 76 BOEING SERVICE BULLETIN 747-25-3653
BLANK PAGE
Table of Contents
Revision Transmittal Sheet5
Summary7
1. PLANNING INFORMATION11
A. Effectivity11
1. Airplanes11
2. Spares Affected16
B. Concurrent Requirements17
C. Reason18
D. Description19
E. Compliance19
F. Approval28
G. Manpower28
H. Weight and Balance Changes33
I. Electrical Load Data33
J. References33
1. Existing Data:33
2. Data Supplied with this Service Bulletin:34
3. Installation Drawings Used in the Preparation of this Service Bulletin:34
K. Publications Affected34
L. Interchangeability and Intermixability of Parts34
M. Software Accomplishment Summary34
2. MATERIAL INFORMATION35
A. Material - Price and Availability35
B. Industry Support Information35
C. Parts Necessary for Each Airplane35
1. Kits/Parts35
2. Parts and Materials Supplied by the Operator35
3. Parts Modified and Reidentified35
4. Parts Removed and Not Replaced37
D. Parts Necessary to Change Spares37
E. Special Tooling - Price and Availability37
F. Special Tooling Necessary to do this Service Bulletin37
3. ACCOMPLISHMENT INSTRUCTIONS39
A. GENERAL INFORMATION39
B. WORK INSTRUCTIONS41
FIGURE 1: FLIGHT COMPARTMENT - CAPTAIN'S SEAT TRACKS - FOREIGN OBJECT DEBRIS -
REMOVAL54
FIGURE 2: FLIGHT COMPARTMENT - FIRST OFFICER'S SEAT TRACKS - FOREIGN OBJECT DEBRIS
- REMOVAL56
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]58
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]61
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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]
.64
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]67
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]70
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]71
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] . . . 72 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] . 74 APPENDIX I: CAPTAIN'S AND FIRST OFFICER'S SEATS, PART NUMBER SERIES 3A258, HORIZONTAL MOVEMENT SYSTEM - HORIZONTAL ACTUATOR LOCATION [Group 1, Configuration 2-4]
.76
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Original Issue: August 04, 2017 747-25-3653Revision 1: October 19, 2018 4 of 76 BOEING SERVICE BULLETIN 747-25-3653
Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION Revision Transmittal SheetNumber: 747-25-3653Original Issue: August 04, 2017 Revision 1: October 19, 2018 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 Effects of this Revision on airplanes on which the Original Issue was previously done:
None.
REASON FOR REVISION This revision is 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. And, added a note clarifying spare seat installation.
These sections were changed:
1. Summary, Background: Added the manufacturer name 'Artus' for part number 'AD865050( )'. Removed compliance time information.
2. Paragraph 1.B., Concurrent Requirements: Changed the issue number of each Ipeco service bulletin.
3. Paragraph 1.C., Reason: Added the manufacturer name 'Artus' for part number 'AD865050( )'. Removed compliance time information. Added Revision 1 information.
4. Paragraph 1.D., Description: Added Revision 1 information.
5. Paragraph 1.E., Compliance: Changed footnote (a) of Tables 3, 4, 7 and 8. Changed 'Condition 1' and 'Condition 2' in Tables 1 thru 4. Changed 'Condition 4' in Tables 3, 4, 7 and 8. Added footnote (a) to Condition 3 (Action 2)' in Tables 3 and 4. In Tables 5, 6, 7 and 8, changed start reference point from a PART to WORK PACKAGE. Table 1, 2, 3, and 4, added footnote for spare seat installation.
6. Paragraph 1.G., Manpower: Added a task and footnote to the table of Work Packages 7 and 8.
7. Paragraph 1.J.1., Existing Data: Added Aircraft Maintenance Manual (AMM) reference.
8. Paragraph 2.C.2., Parts and Materials Supplied by the Operator: Added applicability. Changed information. Added two footnotes.
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Original Issue: August 04, 2017 747-25-3653Revision 1: October 19, 2018 5 of 76
9. Paragraph 2.C.3., Parts Modified and Reidentified: Changed information. Added seat assembly part number suffixed with 'Z', which is the new part number for a changed seat assembly. Add one footnote.
10. Paragraph 3.A., General Information: Changed three notes.
11. Paragraph 3.B., Work Instructions: Added a note related to the seat removal instruction in Part 1 and Part 2. Removed issue information from the Ipeco service bulletin references and added footnote (a) to the tables of Part 1 thru 4, 7 and 8. Added more information to the instructions of Part 5 and 6.
Changed an instruction of Part 1, Part 2, Part 3 and Part 4. Added a note for each 'install a serviceable seat' instruction to refer to the serviceable definition in Paragraph 3.A., General Information. Changed the instruction for 'Condition 3 (Action 2)' of Work Packages 7 and 8. Changed the action for 'Condition 3' of Work Packages 3 and 4. Changed 'Condition 1', 'Condition 2' and 'Condition 4'. WORK PACKAGE 1, 2, 3, and 4, added note for spare seat installation.
12. Figure 1 and Figure 2: Added AMM reference.
13. Appendix A and Appendix B: Changed the description of 'Condition 1' and 'Condition 2'.
14. Appendix C and Appendix D: Changed the action of 'Condition 3' of logic diagram. Changed the description of 'Condition 1', 'Condition 2', Condition 4 and flag note (a).
15. Appendix G and Appendix H: Changed the action of 'Condition 3 (Action 2)' of logic diagram. Changed the description of Condition 4 and flag note (a).
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.
REVISION HISTORY August 04, 2017Original Issue:
October 19, 2018Revision 1:
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Original Issue: August 04, 2017 747-25-3653Revision 1: October 19, 2018 6 of 76 BOEING SERVICE BULLETIN 747-25-3653
Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION SummaryNumber: 747-25-3653Original Issue: August 04, 2017 Revision 1: October 19, 2018 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 the 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 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 the seat by the applicable Ipeco service bulletin, where signs of damage to the HMS make the replacement of the Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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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 is 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., ComplianceYesAD 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 Airplane 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 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 The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to this service bulletin. The Airworthiness Directive will make the compliance tasks and times given in this service bulletin mandatory.
Refer to Paragraph 1.E., Compliance.
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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.
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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 1: October 19, 2018 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING 747-25-3653 Work - See page 1 for details. 10 of 76
Commercial Airplanes 747 Service Bulletin
SPECIAL ATTENTION Number: 747-25-3653 Original Issue: August 04, 2017 Revision 1: October 19, 2018 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 service bulletin is applicable to 747-200B, 747-200C, 747-200F, 747-300, 747- 400, 747-400D, 747-400F, 747-8 and 747-8F Airplanes equipped with Ipeco part number series 3A090 and 3A258 Captain's and First Officer's powered seats, line number 699 and on, in 1 Group. The Variable Numbers and Group Information for the applicable airplanes is given below. An equivalent change is on subsequent production airplanes. Refer to PRR 85901-136S for data about this change.
NOTE: The Variable Number table below includes all affected airplanes up to Line Number 1553.
Affected airplanes after Line Number 1553 will be added to the service bulletin's MyBoeingFleet.com (MBF) "get effectivity" result when they are added to the MBF Fleet Profile Page.
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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 powered Ipeco Captain's seat, part number series 3A090 and powered Ipeco First Officer's seat, part number series 3A090.
1 Airplanes equipped with Ipeco Captain's seat, part number series 3A258 and powered Ipeco First Officer's seat, part number series 3A090.
2 Airplanes equipped with powered 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 1RC501 - RC514 1RC521 - RC528 1RC531 - RC541 1RC546 - RC566 1RC571 - RC582 1RC601 - RC609 1RC641 - RC644 1RC651 - RC652 1RC661 1RC671 - RC672 1RC674 1RF001 - RF006 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details.
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