# Boeing Alert Service Bulletin 747-57A2348: Revision 1 - Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2016-5041; AD 2016-24-02 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication. - Document: [Boeing Alert Service Bulletin 747-57A2348](https://openairdocs.org/service-documents/boeing/747-57a2348.md) - Title as filed: U.S. DOT/FAA - SB-747-57A2348 - Pages: 75 - PDF: https://openairdocs.org/files/sha256/3b/ce/3bcefd7a4a3ae78b13e08666a3f9bc4772e2ba3881b55fc031640e1b0753a7a3 - Page: https://openairdocs.org/service-documents/boeing/747-57a2348/file/3bcefd7a4a3a ## 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 ALERT Number: 747-57A2348 Original Issue: June 12, 2015 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Transmission Aft Bearing Plate Assembly Replacement 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 © 2015 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 Unpublished Work.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: June 12, 2015 747-57A2348 1 of 75 3.0 ### Page 2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 2 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT BLANK PAGE ### Page 3 Table of Contents Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1. PLANNING INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 A. Effectivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 1. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 B. Concurrent Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 C. Reason . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 D. Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 E. Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 F. Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 G. Manpower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 H. Weight and Balance Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 I. Electrical Load Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 J. References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 1. Existing Data: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2. Data Supplied with this Service Bulletin: . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 3. Installation Drawings Used in the Preparation of this Service Bulletin: . . . . . . . . . . . 16 K. Publications Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 L. Interchangeability and Intermixability of Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 M. Software Accomplishment Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2. MATERIAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 A. Material - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 B. Industry Support Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 C. Parts Necessary for Each Airplane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 1. Kits/Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. Parts and Materials Supplied by the Operator . . . . . . . . . . . . . . . . . . . . . . . . 22 3. Parts Modified and Reidentified . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 4. Parts Removed and Not Replaced . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 D. Parts Necessary to Change Spares . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 E. Special Tooling - Price and Availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 F. Special Tooling Necessary to do this Service Bulletin . . . . . . . . . . . . . . . . . . . . . . . 33 3. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 A. GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 B. WORK INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 FIGURE 1: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 42 FIGURE 2: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 44 FIGURE 3: FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 46 FIGURE 4: FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 48 FIGURE 5: FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 50 FIGURE 6: FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 52 FIGURE 7: FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 54 FIGURE 8: FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL . . . 56 FIGURE 9: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 58 FIGURE 10: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 60 FIGURE 11: FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 62 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 3 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 4 FIGURE 12: FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 64 FIGURE 13: FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 66 FIGURE 14: FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 68 FIGURE 15: FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 70 FIGURE 16: FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION. 72 APPENDIX A: COST BENEFIT ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74 APPENDIX B: PARTS DEMAND INTENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 4 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 5 Commercial Airplanes 747 Service Bulletin ALERT SummaryNumber: 747-57A2348Original Issue: June 12, 2015 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Transmission Aft Bearing Plate Assembly Replacement THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. CONCURRENT REQUIREMENTS None. BACKGROUND This service bulletin is sent to provide instruction to replace the aluminum Transmission Aft Bearing Plate Assemblies with new titanium Transmission Aft Bearing Plate Assemblies. If the work given in this bulletin is not completed, then the aluminum Transmission Aft Bearing Plate Assemblies could be damaged in extreme loading conditions such as flap jams or skews. Under these conditions, damaged Transmission Bearing Plate Assemblies could stop the flap transmission from working correctly and could result in loss of flap control. Alternatively, if failure of one of the other components in the flap attachment or flap drive system were to occur, the resulting redistribution of loads could result in damage to the aft bearing plate assemblies, potentially causing detachment of the flap transmission from its flap track and possible flap departure, resulting in loss of controllability of the airplane. Boeing has done an analysis of the aluminum Transmission Aft Bearing Plate Assemblies. Each airplane has eight Transmission Aft Bearing Plate Assemblies, one at each of the eight flap track locations. Static strength analysis has shown that the aluminum Transmission Aft Bearing Plate Assemblies have inadequate strength for one or more of the required load cases, including cases for drive system jam, flap skew, and structural damage tolerance. These types of load cases can cause a flap transmission torque brake trip, which will then cause additional loading on the Transmission Aft Bearing Plate Assemblies common to that flap. This could cause damage to the Transmission Aft Bearing Plate Assemblies. The new titanium Transmission Aft Bearing Plate Assemblies have increased strength to prevent any potential damage caused in these high load cases. Boeing has determined this scenario by analysis and has not yet received any reports of damaged Transmission Aft Bearing Plate Assemblies from operators. NOTE: The work given in this service bulletin is a terminating action for the repeat inspections in Boeing Service Bulletin (SB) 747-57-2347. Each work package in this SB can be completed independently and is considered a terminating action for inspections in SB 747-57-2347 at that flap track only. Repeat inspections given in SB 747-57-2347 must continue at all flap tracks where the modification given in this SB has not been completed. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 5 of 75 ### Page 6 Boeing did a cost benefit analysis on the changes given in this service bulletin. Refer to APPENDIX A for the analysis. Boeing Service Related Problem (SRP) 747-8-SRP-57-0269 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 AffectedNoSpares Affected Paragraph 1.E., Compliance and Paragraph 1.F., Approval YesAD Related Paragraph 1.H., Weight and Balance ChangesYesWeight 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/PartsYesKits/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 NoSpecial Tooling Required ACTION (PRR 85901-140S) Get access to the Transmission Aft Bearing Plate Assemblies located at each flap track. Remove and keep the inboard and outboard flap track fairings. Remove and discard the eight existing aluminum Transmission Aft Bearing Plate Assemblies. Install eight new titanium Transmission Aft Bearing Plate Assemblies and install kept inboard and outboard flap track fairings. Do an inboard and outboard flap adjustment, a check of the flap position and a trailing edge flap system test. EFFECTIVITY 747-8, 747-8F Airplane(s). Refer to Paragraph 1.A.1., Airplanes, for the list of affected airplane(s). 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. Boeing recommends that the change given in this service bulletin be done within 48 months after the original issue date of this service bulletin. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 6 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 7 INDUSTRY SUPPORT INFORMATION Boeing warranty remedies are available for airplanes in warranty as of March 12, 2014. Please refer to Paragraph 2.B., Industry Support Information. The warranty remedies will expire eight years from the original issue date of this service bulletin. MANPOWER Refer to Paragraph 1.G., Manpower. MATERIAL INFORMATION Boeing Supplied Kits/Parts. Refer to Paragraph 2.A., Material - Price and Availability. Operators are encouraged to complete the survey provided in APPENDIX B of this service bulletin to help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 7 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 8 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT GET ACCESS TO THE TRANS MISSION AFT BEARING PLATE ASSEMBLIES OCATED AT EACH FLAP TRACK. REMOVE AND KEEP THE INBOARD AND OUTBOARD FAIRINGS REMOVE AND DIS RD THE EIGHT EXISTING ON AFT BEARING PLATE HT NEW TITANIUM TRANSMISSION AFT BE ING PLATE ASSEMBLIES AND INS ARD AND OUTBOARD FLAP TRACK FAIRINGS AN INBOARD AND OUTBOARD FLAP ADJUST MENT, A CHECK OF THE FLAP POSITION AND A TRAILING EDGE FLAP SYSTEM TEST. FLAP TRACK (TYPICAL) TRANSMISSION REMOVED FOR CLARITY (LEFT SIDE SHOWN, RIGHT SIDE OPPOSITE) 2402054 Original Issue: June 12, 2015 PROPRIETARY - Copyright © Unpublished Export Controlled ECCN: 9E991 - BOEING Work - See page 1 for details. 747-57A2348 8 of 75 ### Page 9 Commercial Airplanes 747 Service Bulletin ALERT Number: 747-57A2348 Original Issue: June 12, 2015 ATA System: 5752 SUBJECT: WINGS - Trailing Edge Flaps - Transmission Aft Bearing Plate Assembly Replacement THIS BULLETIN IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN PARAGRAPH 1.A., EFFECTIVITY. IF AN AIRPLANE HAS BEEN LEASED OR SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS SERVICE BULLETIN TO THE NEW OWNER. 1. PLANNING INFORMATION A. Effectivity 1. Airplanes This service bulletin is applicable to 747-8 and 747-8F Airplanes, line numbers 1420-1434, 1436-1505, 1507, 1508, 1510-1514 in 2 Groups. The Variable Numbers and Group Information for the applicable airplanes is given below. An equivalent change is on subsequent production airplanes. Refer to PRR 85901-140S for data about this change. Refer to Service Bulletin Index D6-30300 Part 3 for Airplane Variable Number, Line Number, and Serial Number data. DESCRIPTIONCONFIGURATIONGROUP 747-8F airplanes, line numbers 1420-1421 with unique track assembly part numbers -1 747-8F airplanes, line numbers 1422-1423 with unique track assembly part numbers -2 747-8F airplanes, line numbers 1424-1433 with unique track assembly part numbers -3 747-8F airplanes, line numbers 1436-1450 with unique track assembly part numbers -4 747-8 airplanes, line numbers 1434-1451 with unique track assembly part numbers -5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 9 of 75 ### Page 10 DESCRIPTIONCONFIGURATIONGROUP 747-8F airplanes, line numbers 1452-1496 with unique track assembly part numbers -6 747-8 airplanes, line numbers 1453-1499 with unique track assembly part numbers -7 747-8F airplanes, line numbers 1501-1505 with unique track assembly part numbers -8 747-8 airplanes, line numbers 1500-1503 with unique track assembly part numbers -9 747-8 airplanes, line numbers 1505-1514 with unique track assembly part numbers -10 Airplane Models: 747-8, 747-8F GroupVariable Number 5RC001 - RC005 7RC006 - RC009 5RC021 - RC023 7RC024 - RC034 9RC035 - RC036 10RC037 - RC040 10RC051 - RC052 7RC066 10RC067 - RC069 1RC501 2RC502 3RC503 4RC504 6RC505 - RC511 8RC512 1RC521 2RC522 3RC523 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 10 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 11 GroupVariable Number 6RC524 - RC528 3RC541 3RC546 6RC547 - RC549 3RC551 - RC553 4RC554 - RC557 6RC558 - RC563 8RC564 3RC571 - RC572 4RC573 - RC576 6RC577 - RC582 3RC601 4RC602 6RC603 - RC605 6RC641 - RC642 8RC671 - RC672 2. Spares Affected None. B. Concurrent Requirements None. C. Reason This service bulletin is sent to provide instruction to replace the aluminum Transmission Aft Bearing Plate Assemblies with new titanium Transmission Aft Bearing Plate Assemblies. If the work given in this bulletin is not completed, then the aluminum Transmission Aft Bearing Plate Assemblies could be damaged in extreme loading conditions such as flap jams or skews. Under these conditions, damaged Transmission Bearing Plate Assemblies could stop the flap transmission from working correctly and could result in loss of flap control. Alternatively, if failure of one of the other components in the flap attachment or flap drive system were to occur, the resulting redistribution of loads could result in damage to the aft bearing plate assemblies, potentially causing detachment of the flap transmission from its flap track and possible flap departure, resulting in loss of controllability of the airplane. Boeing has done an analysis of the aluminum Transmission Aft Bearing Plate Assemblies. Each airplane has eight Transmission Aft Bearing Plate Assemblies, one at each of the eight flap track locations. Static strength analysis has shown that the aluminum Transmission Aft Bearing Plate Assemblies have inadequate strength for one or more of the required load cases, including cases for drive system jam, flap skew, and structural damage tolerance. These types of load cases can cause a flap transmission Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 11 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 12 torque brake trip, which will then cause additional loading on the Transmission Aft Bearing Plate Assemblies common to that flap. This could cause damage to the Transmission Aft Bearing Plate Assemblies. The new titanium Transmission Aft Bearing Plate Assemblies have increased strength to prevent any potential damage caused in these high load cases. Boeing has determined this scenario by analysis and has not yet received any reports of damaged Transmission Aft Bearing Plate Assemblies from operators. NOTE: The work given in this service bulletin is a terminating action for the repeat inspections in Boeing Service Bulletin (SB) 747-57-2347. Each work package in this SB can be completed independently and is considered a terminating action for inspections in SB 747-57-2347 at that flap track only. Repeat inspections given in SB 747-57-2347 must continue at all flap tracks where the modification given in this SB has not been completed. Boeing did a cost benefit analysis on the changes given in this service bulletin. Refer to APPENDIX A for the analysis. Boeing Service Related Problem (SRP) 747-8-SRP-57-0269 is related to this service bulletin. D. Description Get access to the Transmission Aft Bearing Plate Assemblies located at each flap track. Remove and keep the inboard and outboard flap track fairings. Remove and discard the eight existing aluminum Transmission Aft Bearing Plate Assemblies. Install eight new titanium Transmission Aft Bearing Plate Assemblies and install kept inboard and outboard flap track fairings. Do an inboard and outboard flap adjustment, a check of the flap position and a trailing edge flap system test. The work in this service bulletin is done in the maintenance zone(s) given below. Group 1-4, 6, 8: Affected Maintenance Zones ZoneModel 561, 563, 565, 567, 661, 663, 665, 667747-8F Group 5, 7, 9-10: Affected Maintenance Zones ZoneModel 561, 563, 565, 567, 661, 663, 665, 667747-8 E. 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. Boeing recommends that the change given in this service bulletin be done within 48 months after the original issue date of this service bulletin. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 12 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 13 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 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. G. Manpower The tables below show an estimate of the task hours necessary to do this modification for each flap track. 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. Work Package 1 - Flap Track 1 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 1 1.001.001FIGURE 9 3.5072Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 1 can be done at the same time as Work Packages 2, 3, 4, 5, 6, 7, and 8 Work Package 2- Flap Track 2 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 2 1.001.001FIGURE 10 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 13 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 14 Work Package Number 2 can be done at the same time as Work Packages 1, 3, 4, 5, 6, 7, and 8 Work Package 3 - Flap Track 3 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 3 1.001.001FIGURE 11 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 3 can be done at the same time as Work Packages 1, 2, 4, 5, 6, 7, and 8 Work Package 4 - Flap Track 4 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 4 1.001.001FIGURE 12 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 4 can be done at the same time as Work Packages 1, 2, 3, 5, 6, 7, and 8 Work Package 5 - Flap Track 5 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 5 1.001.001FIGURE 13 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 5 can be done at the same time as Work Packages 1, 2, 3, 4, 6, 7, and 8 Work Package 6 - Flap Track 6 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 6 1.001.001FIGURE 14 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 14 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 15 Work Package 6 - Flap Track 6 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 6 can be done at the same time as Work Packages 1, 2, 3, 4, 5, 7, and 8 Work Package 7 - Flap Track 7 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 7 1.001.001FIGURE 15 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 7 can be done at the same time as Work Packages 1, 2, 3, 4, 5, 6, and 8 Work Package 8 - Flap Track 8 Transmission Aft Bearing Plate Assembly Replacement Elapsed HoursTask HoursNumber of PersonsTask 2.755.502Access 0.750.751FIGURE 8 1.001.001FIGURE 16 3.507.002Close Access 8.0014.25TOTAL FOR EACH FLAP TRACK Work Package Number 8 can be done at the same time as Work Packages 1, 2, 3, 4, 5, 6, and 7 H. Weight and Balance Changes Change in Moment (Pound-Inches) Change in Weight (Pounds)Airplane +12,945.50+8.50All I. Electrical Load Data Not changed. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 15 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 16 J. References 1. Existing Data: a. Engineering Change Memo PRR 85901-140S b. Boeing Service Bulletin 747-57-2347 c. Boeing Service Letter 747-SL-51-048 d. Boeing Service Related Problem (SRP) 747-8-SRP-57-0269 e. Service Bulletin Index D6-30300 f. Standard Overhaul Practices Manual (SOPM) 20-50-01, 20-50-10 g. 747-8 Aircraft Maintenance Manual (AMM) 27-51-00, 27-51-01, 27-51-04, 27-51-31, 27-51-33 2. Data Supplied with this Service Bulletin: None. 3. Installation Drawings Used in the Preparation of this Service Bulletin: TitleDrawing Number TRACK INSTL - OUTBOARD FLAP, TRACK NO. 1 AND NO. 8113U1150 TRACK INSTL - OUTBOARD FLAP, TRACK NO. 2 AND NO. 7113U1250 TRACK INSTL - INBOARD FLAP, TRACK NO. 3 AND NO. 6113U1350 TRACK INSTL - INBOARD FLAP, TRACK NO. 4 AND NO. 5113U1450 TRANSMISSION INSTL OUTBD - OUTBD T.E. FLAPS, DRIVE NO. 1 AND 8 256U5100 TRANSMISSION INSTL INBD - OUTBD T.E. FLAPS, DRIVE NO. 2 AND 7 256U5200 TRANSMISSION INSTL OUTBD - INBD T.E. FLAPS, DRIVE NO. 3 AND 6 256U5300 TRANSMISSION INSTL INBD - INBD T.E. FLAPS DRIVE, NO. 4 AND 5 256U5400 The table above lists applicable drawings used to prepare this service bulletin. The drawings are not necessary to make the specified changes, and are not supplied with this service bulletin. The drawings may not be applicable to all airplane configurations or operators. K. Publications Affected 1. Publications: Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 16 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 17 Chapter-SectionPublication 27-51, 27-50747 Fault Isolation Manual 27-51747 Illustrated Parts Catalog 57-52Component Maintenance Manual 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 affects FCS but no new DTIs are 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 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 17 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 18 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 18 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT BLANK PAGE ### Page 19 2. MATERIAL INFORMATION A. Material - Price and Availability Boeing can supply the kit shown in Paragraph 2.C., Parts Necessary for Each Airplane. Operators are encouraged to share schedule requirements with Boeing for incorporation of the service bulletin. The kits are subject to the terms and conditions of the Boeing standard purchase order acknowledgment. Prices are in United States Dollars. Terms: Net 30 days. Reference this service bulletin and submit your purchase order by one of these methods: 1. Order on-line via ATA Spec 2000 or The Boeing PART Page 2. Fax to (206) 662-7145 REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION Unit Price as of the original issue date of this Ser- vice Bulletin (US Dollars) ROLT as of the original issue date of this Ser- vice Bulletin (Cal- endar Days) QTYDateNameKit Number 48,682.002381May 8, 2015TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-1 48,682.002382May 25, 2015TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-1 48,682.0023820November 25, 2015 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-1 48,682.0023820January 5, 2016 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-1 48,682.0023820February 2, 2016 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-1 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 19 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 20 REFER TO THE BOEING PART PAGE ON MYBOEINGFLEET.COM OR CONTACT FIRST RESPONDER AT FR@BOEING.COM FOR THE LATEST REORDER LEAD TIME (ROLT) AND PRICE INFORMATION Unit Price as of the original issue date of this Ser- vice Bulletin (US Dollars) ROLT as of the original issue date of this Ser- vice Bulletin (Cal- endar Days) QTYDateNameKit Number 48,682.0023824March 1, 2016TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-1 Operators are encouraged to complete the survey provided in APPENDIX B of this service bulletin to help Boeing predict the quantity and timing of the Boeing Supplied Kits/Parts. B. Industry Support Information Boeing warranty remedies are available for 747-8 and 747-8F airplanes in warranty as of March 12, 2014. For task hour reimbursement for airplanes in warranty as of that date, send a warranty claim to Boeing Fleet Support Contracts - Warranty. The kits for airplanes in warranty as of that date will be supplied at no charge. Send a purchase order for the kits to Boeing Material Management. Please refer to this service bulletin number and reference the airplane variable numbers in your purchase order. The warranty remedies will expire eight years from the original issue date of this service bulletin. C. Parts Necessary for Each Airplane 1. Kits/Parts To get the kits/parts shown below, refer to Paragraph 2.A., Material - Price and Availability. NOTE: One top kit and the items shown in Paragraph 2.C.2., Parts and Materials Supplied by the Operator, are necessary for each airplane. The Top Kit is divided into Figure kits for each installation figure shown in the table below. Figure Kit 14131211109Top Kit 111111015U2129-1 Figure Kit 1615Top Kit 11015U2129-1 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 20 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 21 ALL KIT 015U2129-1 Notes Existing Part NumberName Figure New Part Number 14131211109 Qty -TRANSMISSION AFT BEARING PLATE ASSY .....1113U1192-5 -TRANSMISSION AFT BEARING PLATE ASSY ....1.113U1292-5 -TRANSMISSION AFT BEARING PLATE ASSY ...1..113U1392-5 -TRANSMISSION AFT BEARING PLATE ASSY 1.....113U1392-6 -TRANSMISSION AFT BEARING PLATE ASSY ..1...113U1492-7 -TRANSMISSION AFT BEARING PLATE ASSY .1....113U1492-8 -NUT, CASTELLAT- ED 2..2..BACN11N107CS -NUT....22BACN11N108CS -NUT, CASTELLAT- ED .22...BACN11N110CS -NUT, CASTELLAT- ED 2..222BACN11N7CS -NUT, CASTELLAT- ED .22...BACN11N9CS -PIN422444BACP18BC03A08P -PIN.22...BACP18BC04A10P -WASHER.66...BACW10BP10APU -WASHER12..1244BACW10BP7APU -WASHER....46BACW10BP8APU -WASHER.22...BACW10BP9APU Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 21 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 22 ALL KIT 015U2129-1 Notes Existing Part NumberName Figure New Part Number 1615 Qty -TRANSMISSION AFT BEARING PLATE AS- SY 1.113U1192-6 -TRANSMISSION AFT BEARING PLATE AS- SY .1113U1292-6 -NUT22BACN11N108CS -NUT, CASTELLATED22BACN11N7CS -PIN44BACP18BC03A08P -WASHER44BACW10BP7APU -WASHER64BACW10BP8APU 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. NotesNameQTYPart Number / Specification (a)WASHER2BACW10BP9APU (a) These washers are for operators using the optional BACB30LE9BD24 bolts in FIGURE 12 and FIGURE 13. 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. Group 1: NotesNew Part NumberNameQTYExisting Part Number (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-1 (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 22 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 23 Group 1: NotesNew Part NumberNameQTYExisting Part Number (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-5 (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-6 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-1 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-2 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-1 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-2 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 2: NotesNew Part NumberNameQTYExisting Part Number (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-3 (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-4 (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-5 (a)-TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-6 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-1 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 23 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 24 Group 2: NotesNew Part NumberNameQTYExisting Part Number (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-2 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-1 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-2 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 3: NotesNew Part NumberNameQTYExisting Part Number -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-3 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-4 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-1 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-2 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 24 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 25 Group 3: NotesNew Part NumberNameQTYExisting Part Number (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 4: NotesNew Part NumberNameQTYExisting Part Number -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-5 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-6 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-1 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-2 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 5: NotesNew Part NumberNameQTYExisting Part Number -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 25 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 26 Group 5: NotesNew Part NumberNameQTYExisting Part Number -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-101 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-102 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-101 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-102 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 6: NotesNew Part NumberNameQTYExisting Part Number (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1113U1151-7 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1113U1151-8 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1113U1251-9 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1113U1251-10 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 26 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 27 Group 6: NotesNew Part NumberNameQTYExisting Part Number (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1113U1351-7 (a)-INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1113U1351-8 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1113U1451-3 (a)-INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1113U1451-4 -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-5 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-6 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-5 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-6 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 27 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 28 Group 7: NotesNew Part NumberNameQTYExisting Part Number (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1113U1151-7 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1113U1151-8 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1113U1251-9 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1113U1251-10 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1113U1351-103 (a)-INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1113U1351-104 (a)-INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1113U1451-103 (a)-INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1113U1451-104 -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-101 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 28 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 29 Group 7: NotesNew Part NumberNameQTYExisting Part Number (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-102 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-105 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-106 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 8: NotesNew Part NumberNameQTYExisting Part Number -113U1151-11INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1113U1151-9 -113U1151-12INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1113U1151-10 -113U1251-13INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1113U1251-11 -113U1251-14INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1113U1251-12 -113U1351-21INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1113U1351-9 -113U1351-22INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1113U1351-10 -113U1451-19INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1113U1451-7 -113U1451-20INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1113U1451-8 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 29 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 30 Group 8: NotesNew Part NumberNameQTYExisting Part Number -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 -113U1351-23TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-11 -113U1351-24TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-12 -113U1451-21TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-9 -113U1451-22TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-10 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Group 9: NotesNew Part NumberNameQTYExisting Part Number -113U1151-11INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1113U1151-9 -113U1151-12INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1113U1151-10 -113U1251-13INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1113U1251-11 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 30 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 31 Group 9: NotesNew Part NumberNameQTYExisting Part Number -113U1251-14INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1113U1251-12 -113U1351-109INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1113U1351-105 -113U1351-110INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1113U1351-106 -113U1451-111INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1113U1451-107 -1131451-112INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1113U1451-108 -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 -113U1351-111TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-107 -113U1351-112TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-108 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-105 (a)-TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-106 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 31 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 32 Group 10: NotesNew Part NumberNameQTYExisting Part Number -113U1151-11INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1113U1151-9 -113U1151-12INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1113U1151-10 -113U1251-13INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1113U1251-11 -113U1251-14INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1113U1251-12 -113U1351-109INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1113U1351-105 -113U1351-110INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1113U1351-106 -113U1451-111INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1113U1451-107 -113U1451-112INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1113U1451-108 -113U1151-13TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1113U1151-5 -113U1151-14TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1113U1151-6 -113U1251-15TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1113U1251-7 -113U1251-16TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1113U1251-8 -113U1351-111TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1113U1351-107 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 32 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 33 Group 10: NotesNew Part NumberNameQTYExisting Part Number -113U1351-112TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1113U1351-108 -113U1451-113TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1113U1451-109 -113U1451-114TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1113U1451-110 (a) There is no equivalent Boeing part number for the changed part. Identify on the part that the change done in accordance with this service bulletin was made. 4. Parts Removed and Not Replaced None. D. Parts Necessary to Change Spares None. E. Special Tooling - Price and Availability None. F. Special Tooling Necessary to do this Service Bulletin No special tools or equipment are necessary to do the change in this service bulletin. But, maintenance and overhaul tools in the manuals given in Paragraph 1.J., References, can be necessary. Examine operator tool supply to make sure all necessary tools are available. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 33 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 34 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 34 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT BLANK PAGE ### Page 35 3. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION CAUTION: 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. 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. Task Hours and Elapsed Hours for each package are given in Paragraph 1.G., Manpower. You can do each work package independently. 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 Structural Repair Manual, Chapter 51. — Values for airframe maintenance tasks are included in Chapter 20 of 747 Aircraft Maintenance Manual (AMM). — Values for electrical maintenance tasks are included in Chapter 20 of Standard Wiring Practices Manual (SWPM). — Values for engine maintenance tasks are included in Chapter 70 of 747 Aircraft Maintenance Manual (AMM). — Non-standard torque values for maintenance tasks are included in the applicable installation step. 5. Use the approved fastener, process and material substitutions in accordance with SRM Chapter 51. 6. If the length of any fastener specified in this service bulletin does not meet installation standards given in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards given in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 35 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 36 7. 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. 8. Boeing Service Letter 747-SL-51-048, Damage Reporting and Repair Plan/Design Guidelines, is an acceptable procedure to request information from Boeing for additional structural repair instructions. The Service Letter describes what information must be provided to Boeing before a structural repair can be provided. 9. The instructions in Paragraph 3.B., Work Instructions and the figures can include operation of tools or test equipment. Boeing Engineering Tool Drawings, the Illustrated Tool and Equipment Manual, and the Special Tool and Ground Handling Drawing Index contain data on versions of the tools or test equipment that you can use. It is permitted to use replaced tools. It is not permitted to use superseded tools. 10. 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. 11. Where the work instructions include installation of a kept part, a new or serviceable part with the same part number can be installed as an alternative to the kept part. 12. This service bulletin includes functional test procedures for the systems changed by this service bulletin. More functional tests can possibly be necessary in accordance with standard maintenance practices because of interruption to other airplane systems. 13. Use of colors in Figures is based on guidance from the ATA e-Business Program (ATA) iSpec 2200. 14. The compliance times for the actions in Paragraph 3.B., WORK INSTRUCTIONS are in Paragraph 1.E., Compliance. 15. 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. 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. B. WORK INSTRUCTIONS WORK PACKAGE 1 - FLAP TRACK 1 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 1 - OUTBOARD ACCESS. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 36 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 37 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 1 in accordance with FIGURE 1. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 1 in accordance with FIGURE 9. 4. Do PART 3 - CLOSE OUTBOARD ACCESS. 5. Put the airplane back to a serviceable condition. WORK PACKAGE 2 - FLAP TRACK 2 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 1 - OUTBOARD ACCESS. 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 2 in accordance with FIGURE 2. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 2 in accordance with FIGURE 10. 4. Do PART 3 - CLOSE OUTBOARD ACCESS. 5. Put the airplane back to a serviceable condition. WORK PACKAGE 3 - FLAP TRACK 3 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 2 - INBOARD ACCESS. 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 3 in accordance with FIGURE 3. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 3 in accordance with FIGURE 11. 4. Do PART 4 - CLOSE INBOARD ACCESS. 5. Put the airplane back to a serviceable condition. WORK PACKAGE 4 - FLAP TRACK 4 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 2 - INBOARD ACCESS. 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 4 in accordance with FIGURE 4. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 4 in accordance with FIGURE 12. 4. Do PART 4 - CLOSE INBOARD ACCESS. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 37 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 38 5. Put the airplane back to a serviceable condition. WORK PACKAGE 5 - FLAP TRACK 5 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 2 - INBOARD ACCESS. 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 5 in accordance with FIGURE 5. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 5 in accordance with FIGURE 13. 4. Do PART 4 - CLOSE INBOARD ACCESS. 5. Put the airplane back to a serviceable condition. WORK PACKAGE 6 - FLAP TRACK 6 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 2 - INBOARD ACCESS. 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 6 in accordance with FIGURE 6. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 6 in accordance with FIGURE 14. 4. Do PART 4 - CLOSE INBOARD ACCESS. 5. Put the airplane back to a serviceable condition. WORK PACKAGE 7 - FLAP TRACK 7 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 1 - OUTBOARD ACCESS. 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 7 in accordance with FIGURE 7. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 7 in accordance with FIGURE 15. 4. Do PART 3 - CLOSE OUTBOARD ACCESS. 5. Put the airplane back to a serviceable condition. WORK PACKAGE 8 - FLAP TRACK 8 TRANSMISSION AFT BEARING PLATE ASSEMBLY REPLACEMENT 1. Do PART 1 - OUTBOARD ACCESS. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 38 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 39 2. RC- Remove the Transmission Aft Bearing Plate Assembly from Flap Track 8 in accordance with FIGURE 8. 3. RC- Install the new Transmission Aft Bearing Plate Assembly at Flap Track 8 in accordance with FIGURE 16. 4. Do PART 3 - CLOSE OUTBOARD ACCESS. 5. Put the airplane back to a serviceable condition. PART 1 - OUTBOARD ACCESS 1. Do one of the following options: NOTE: OPTION 2, Disconnecting the Flap Transmission will involve significantly more work and risk possible damage to the Flap Transmission. a. OPTION 1: Secure the Flap Transmission as follows: (1) Extend and deactivate all trailing edge flaps. Refer to 747-8 AMM 27-51-00 as an accepted procedure. (2) Remove the Outboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-33 as an accepted procedure. (3) Install the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. b. OPTION 2: Disconnect the Flap Transmission as follows: (1) Extend and deactivate all trailing edge flaps. Refer to 747-8 AMM 27-51-00 as an accepted procedure. (2) Prepare for the Removal of the Flap Transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. NOTE: For flap tracks 1 and 8, the position transmitter must be removed. (3) Disconnect the applicable torque tubes from the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. (4) Disconnect the ball screw from the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. (5) Install the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. PART 2 - INBOARD ACCESS 1. Do one of the following options: NOTE: OPTION 2, Disconnecting the Flap Transmission will involve significantly more work and risk possible damage to the Flap Transmission. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 39 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 40 a. OPTION 1: Secure the Flap Transmission as follows: (1) Extend and deactivate all trailing edge flaps. Refer to 747-8 AMM 27-51-00 as an accepted procedure. (2) Remove the Inboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-33 as an accepted procedure. (3) Install the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. b. OPTION 2: Disconnect the Flap Transmission as follows: (1) Extend and deactivate all trailing edge flaps. Refer to 747-8 AMM 27-51-00 as an accepted procedure. (2) Prepare for the Removal of the Flap Transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. NOTE: For flap tracks 3 and 6, the position transmitter must be removed. (3) Disconnect the applicable torque tubes from the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. (4) Disconnect the ball screw from the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. (5) Install the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. PART 3 - CLOSE OUTBOARD ACCESS 1. If OPTION 1 was used for PART 1 - OUTBOARD ACCESS, do the following: a. Remove the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. b. Install the Outboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-31 as an accepted procedure. c. Do a Check of the Flap Position. Refer to 747-8 AMM 27-51-04 as an accepted procedure. d. Do a Trailing Edge Flap System - System Test. Refer to 747-8 AMM 27-51-00 as an accepted procedure. 2. If OPTION 2 was used for PART 1 - OUTBOARD ACCESS, do the following: a. Remove the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. b. Attach the ball screw to the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 40 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 41 c. Connect the applicable torque tubes to the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. d. Install the Outboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-31 as an accepted procedure. e. Do the Outboard Trailing Edge Flap - Adjustment. Refer to 747-8 AMM 27-51-04 as an accepted procedure. f. Do a Check of the Flap Position. Refer to 747-8 AMM 27-51-04 as an accepted procedure. g. Do a Trailing Edge Flap System - System Test. Refer to 747-8 AMM 27-51-00 as an accepted procedure. PART 4 - CLOSE INBOARD ACCESS 1. If OPTION 1 was used for PART 2 - INBOARD ACCESS, do the following: a. Remove the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. b. Install the Inboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-31 as an accepted procedure. c. Do a Check of the Flap Position. Refer to 747-8 AMM 27-51-01 as an accepted procedure. d. Do a Trailing Edge Flap System - System Test. Refer to 747-8 AMM 27-51-00 as an accepted procedure. 2. If OPTION 2 was used for PART 2 - INBOARD ACCESS, do the following: a. Remove the transmission removal and installation equipment. Refer to 747-8 AMM 27-51-33 as an accepted procedure. b. Attach the ball screw to the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. c. Connect the applicable torque tubes to the transmission. Refer to 747-8 AMM 27-51-33 as an accepted procedure. d. Install the Inboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-31 as an accepted procedure. e. Do the Inboard Trailing Edge Flap - Adjustment. Refer to 747-8 AMM 27-51-01 as an accepted procedure. f. Do a Check of the Flap Position. Refer to 747-8 AMM 27-51-01 as an accepted procedure. g. Do a Trailing Edge Flap System - System Test. Refer to 747-8 AMM 27-51-00 as an accepted procedure. Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 41 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 42 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT TRANSMISSION FLAP TRACK TRANSMISSION AFT BEARING PLATE ASSEMBLY TRANSMISSION REMOVED FOR CLARITY A-A 2409295 FIGURE 1: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 42 of 75 ### Page 43 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.6-WasherRemove Under head.2BACW10BP8CDWasherRemove / Keep -2BACB30NR8DK21BoltRemove / Keep Head side.2BACB28AK08-039BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7DK20. 4-WasherRemove Under head.2BACW10BP7ACUWasherRemove / Keep -2BACB30NR7DK20 OR BACB30LE7DK20 BoltRemove / Keep Head side.2BACB28AK07-039BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 1: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 43 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 44 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT TRANSMISSION FLAP TRACK TRANSMISSION REMOVED FOR CLARITY TRANSMISSION AFT BEARING PLATE ASSEMBLY A-A 2409333 FIGURE 2: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 44 of 75 ### Page 45 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.4-WasherRemove Under head.2BACW10BP8CDWasherRemove / Keep -2BACB30LT8DK22BoltRemove / Keep Head side.2BACB28AK08-042BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30LT7DK22. 2 washers are used for BACB30LE7DK22. 4-WasherRemove Under head.2BACW10BP7ACUWasherRemove / Keep -2BACB30LT7DK22 OR BACB30LE7DK22 BoltRemove / Keep Head side.2BACB28AK07-044BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 2: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 45 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 46 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT TRANSMISSION FLAP TRACK TRANSMISSION REMOVED FOR CLARITY TRANSMISSION PLATE ASSEMBLY AFT BEARING A-A 2409563 FIGURE 3: FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 46 of 75 ### Page 47 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.8-WasherRemove Under head.2BACW10BP7CDWasherRemove / Keep -2BACB30NR7DK21BoltRemove / Keep Head side.2BACB28AK07-041BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7BD20. 4-WasherRemove Under head.2BACW10BP7ACUWasherRemove / Keep -2BACB30NR7DK20 OR BACB30LE7BD20 BoltRemove / Keep Head side.2BACB28AK07-040BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 3: FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 47 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 48 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT FLAP TRACK TRANSMISSION AFT BEARING PLATE ASSEMBLY TRANSMISSION REMOVED FOR CLARITY A-A 2409570 FIGURE 4: FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 48 of 75 ### Page 49 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.6-WasherRemove Under head.2BACW10BP10CDWasherRemove / Keep -2BACB30NR10DK27BoltRemove / Keep Head side.2BACB28AK10-053BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30NR9DK24. 2 washers are used for BACB30LE9BD24. 4-WasherRemove Under head.2BACW10BP9ACUWasherRemove / Keep -2BACB30NR9DK24 OR BACB30LE9BD24 BoltRemove / Keep Head side.2BACB28AK09-042BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 4: FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 49 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 50 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT FLAP TRACK TRANSMISSION AFT BEARING PLATE ASSEMBLY TRANSMISSION REMOVED FOR CLARITY A-A 2409586 FIGURE 5: FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 50 of 75 ### Page 51 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.6-WasherRemove Under head.2BACW10BP10CDWasherRemove / Keep -2BACB30NR10DK27BoltRemove / Keep Head side.2BACB28AK10-053BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30NR9DK24. 2 washers are used for BACB30LE9BD24. 4-WasherRemove Under head.2BACW10BP9ACUWasherRemove / Keep -2BACB30NR9DK24 OR BACB30LE9BD24 BoltRemove / Keep Head side.2BACB28AK09-042BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 5: FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 51 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 52 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT FLAP TRACK TRANSMISSION TRANSMISSION REMOVED FOR CLARITY A-A TRANSMISSION PLATE ASSEMBLY AFT BEARING 2409568 FIGURE 6: FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 52 of 75 ### Page 53 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.8-WasherRemove Under head.2BACW10BP7CDWasherRemove / Keep -2BACB30NR7DK21BoltRemove / Keep Head side.2BACB28AK07-041BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7BD20. 4-WasherRemove Under head.2BACW10BP7ACUWasherRemove / Keep -2BACB30NR7DK20 OR BACB30LE7BD20 BoltRemove / Keep Head side.2BACB28AK07-040BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 6: FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 53 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 54 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT FLAP TRACK TRANSMISSION TRANSMISSION REMOVED FOR CLARITY TRANSMISSION AFT BEARING PLATE ASSEMBLY A-A 2409349 FIGURE 7: FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 54 of 75 ### Page 55 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.4-WasherRemove Under head.2BACW10BP8CDWasherRemove / Keep -2BACB30LT8DK22BoltRemove / Keep Head side.2BACB28AK08-042BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30LT7DK22. 2 washers are used for BACB30LE7DK22. 4-WasherRemove Under head.2BACW10BP7ACUWasherRemove / Keep -2BACB30LT7DK22 OR BACB30LE7DK22 BoltRemove / Keep Head side.2BACB28AK07-044BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 7: FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 55 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 56 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT FLAP TRACK TRANSMISSION REMOVED FOR CLARITY TRANSMISSION AFT BEARING PLATE ASSEMBLY A-A 2409323 FIGURE 8: FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 56 of 75 ### Page 57 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -2-Cotter PinRemove1 -2-NutRemove Under nut.6-WasherRemove Under head.2BACW10BP8CDWasherRemove / Keep -2BACB30NR8DK21BoltRemove / Keep Head side.2BACB28AK08-039BushingRemove / Keep -2-Cotter PinRemove2 -2-NutRemove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7DK20. 4-WasherRemove Under head.2BACW10BP7ACUWasherRemove / Keep -2BACB30NR7DK20 OR BACB30LE7DK20 BoltRemove / Keep Head side.2BACB28AK07-039BushingRemove / Keep ---TRANSMISSION AFT BEARING PLATE AS- SEMBLY Remove3 FIGURE 8: FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 57 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 58 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT TRANSMISSION FLAP TRACK TRANSMISSION AFT BEARING PLATE ASSEMBLY TRANSMISSION REMOVED FOR CLARITY A-A 2409817 FIGURE 9: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 58 of 75 ### Page 59 The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY numbers shown below are the number of parts necessary for this figure. More DataQtyIdentificationNameTaskStep -1113U1192-5TRANSMISSION AFT BEARING PLATE AS- SY Install (New)1 Head side.2BACB28AK07-039BushingInstall (Kept) -2BACB30NR8DK21BoltInstall (Kept) Under head.2BACW10BP8CDWasherInstall (Kept) Under nut.6BACW10BP8APUWASHERInstall (New) -2BACN11N108CSNUTInstall (New) -2BACP18BC03A08PPINInstall (New) Head side.2BACB28AK07-039BushingInstall (Kept)2 -2BACB30NR7DK20 OR BACB30LE7DK20 BoltInstall (Kept) Under head.2BACW10BP7ACUWasherInstall (Kept) Under nut. 1 washer is required for BACB30NR7DK20. 2 washers are re- quired for BACB30LE7DK20. 4BACW10BP7APUWASHERInstall (New) -2BACN11N7CSNUT, CASTELLATEDInstall (New) -2BACP18BC03A08PPINInstall (New) (a)--INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 Identify3 (a)--TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentified for new part numbers. Refer to SOPM 20-50-10 as an accepted procedure. FIGURE 9: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 2 OF 2) Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 59 of 75 BOEING SERVICE BULLETIN 747-57A2348 ALERTALERT ### Page 60 (OCR) BOEING SERVICE BULLETIN 747-57A2348 ALERT ALERT TRANSMISSION FLAP TRACK TRANSMISSION REMOVED 10 0 FOR CLARITY TRANSMISSION AFT BEARING PLATE ASSEMBLY A-A 2409822 FIGURE 10: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2) Original Issue: June 12, 2015 Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished 747-57A2348 Work - See page 1 for details. 60 of 75 The text continues at https://openairdocs.org/service-documents/boeing/747-57a2348/file/3bcefd7a4a3a.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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