### Commercial **Airplanes** 

# 747

Service Bulletin **ALERT Number:**  **747-57A2348** Original Issue: June 12, 2015 Revision 1: February 26, 2016 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. 9E991 ECCN: 

## 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 Unpublished Work.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 Revision 1: February 26, 2016 1of78 2.0Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 2of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**

BLANK PAGE**Table of Contents**

Revision Transmittal Sheet
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Summary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 1. PLANNING INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 A. Effectivity
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 1. Airplanes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2. Spares Affected
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 B. Concurrent Requirements
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 C. Reason
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 D. Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 E. Compliance
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 F. Approval
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 G. Manpower
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 H. Weight and Balance Changes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 I. Electrical Load Data
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 J. References
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1. Existing Data:
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2. Data Supplied with this Service Bulletin:
. . . . . . . . . . . . . . . . . . . . . . . . . . . 19 3. Installation Drawings Used in the Preparation of this Service Bulletin:
. . . . . . . . . . . 19 K. Publications Affected
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 L. Interchangeability and Intermixability of Parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . 20 M. Software Accomplishment Summary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 2. MATERIAL INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 A. Material - Price and Availability
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 B. Industry Support Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 C. Parts Necessary for Each Airplane
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 1. Kits/Parts
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2. Parts and Materials Supplied by the Operator
. . . . . . . . . . . . . . . . . . . . . . . . 24 3. Parts Modified and Reidentified
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 4. Parts Removed and Not Replaced
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 D. Parts Necessary to Change Spares
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 E. Special Tooling - Price and Availability
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 F. Special Tooling Necessary to do this Service Bulletin
. . . . . . . . . . . . . . . . . . . . . . . 35 3. ACCOMPLISHMENT INSTRUCTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 A. GENERAL INFORMATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 B. WORK INSTRUCTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 FIGURE 1: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 45 FIGURE 2: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 47 FIGURE 3: FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 49 FIGURE 4: FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 51 FIGURE 5: FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 53 FIGURE 6: FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 55 FIGURE 7: FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 57 FIGURE 8: FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL
. . . 59 FIGURE 9: FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 61 FIGURE 10: FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 63
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 3of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**FIGURE 11: FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 65

FIGURE 12: FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 67 FIGURE 13: FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 69 FIGURE 14: FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 71 FIGURE 15: FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 73 FIGURE 16: FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION
. 75 APPENDIX A: DELETED
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 APPENDIX B: PART DEMAND INTENT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 4of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**

### Commercial **Airplanes** 

# 747

Service Bulletin **ALERT Revision Transmittal Sheet**  **Number: 747-57A2348**  Original Issue: June 12, 2015 Revision 1: February 26, 2016 ATA System: 5752 **SUBJECT:** WINGS - Trailing Edge Flaps - Transmission Aft Bearing Plate Assembly Replacement This revision includes all pages of the service bulletin. **COMPLIANCE INFORMATION RELATED TO THIS REVISION** 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. Effects of this Revision on airplanes on which Original Issue was previously done: None. **REASON FOR REVISION** This revision is sent to incorporate changes to the access requirements and kit found to be necessary during the validation of the original issue. As a part of a service bulletin validation program, this change was completed on airplane RC504 by Service Bulletin 747-57A2348 Original Issue before the release of Revision 1 of this service bulletin. The change completed on airplane RC504 by Service Bulletin 747-57A2348 Original Issue is equivalent to the release of Revision 1 of this service bulletin. Airplane RC504 has the configuration of a Group 4 airplane. These sections were changed: 1. In Summary, Background, cost benefit analysis statement removed, validation paragraph added and summary evaluation table updated. 2. In Section 1.A.1., Airplanes, corrected the number of groups and removed airplanes, RC021, RC051 and RC052, from effectivity. 3. In Section 1.C., Reason, reason for revision added, validation paragraph added and cost benefit analysis statement removed. 4. In Section 1.D., Description, effects of this revision paragraph added. 5. In Section 1.G., Manpower, estimates revised to include revised access steps. 6. In Section 1.J., References, AMM references added for revised access steps.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 5of787. In Section 2.A., Material - Price and Availability, note added to clarify the relationship between

015U2129-1 and 015U2129-2 Top Kits. 8. In Section 2.C.1., Kits/Parts, new kit added. 9. In Section 2.C.2., Parts and Materials Supplied by the Operator, parts removed and revised to 'None.' 10. In Section 3.B., Work Instructions, revised the access steps in PART 1, PART 2, PART 3 and PART 4. 11. Figures 9 thru 16, specific part marking code added. 12. Figures 12 and 13, washer quantity increased and cotter pin part number revised. 13. Appendix A: Cost Benefit Analysis deleted. 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** June 12, 2015 Original Issue: February 26, 2016 Revision 1:

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 6of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**

### Commercial **Airplanes** 

# 747

Service Bulletin **ALERT Summary**  **Number: 747-57A2348**  Original Issue: June 12, 2015 Revision 1: February 26, 2016 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 SB747-57-2347at that flap track only. Repeat inspections given in SB747-57-2347must 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 Revision 1: February 26, 2016 7of78Boeing Service Related Problem (SRP)747-8-SRP-57-0269is related to this service bulletin.

As a part of a service bulletin validation program, this change was completed on airplane RC504 by Service Bulletin 747-57A2348 Original Issue before the release of Revision 1 of this service bulletin. The change completed on airplane RC504 by Service Bulletin 747-57A2348 Original Issue is equivalent to the release of Revision 1 of this service bulletin. Airplane RC504 has the configuration of a Group 4 airplane. This table is provided to operators for planning purposes only. Refer to the applicable sections for more information. **Reference Affected**  **Planning Data** Paragraph 1.A.2., Spares Affected No Spares Affected Paragraph 1.E., Complianceand Paragraph 1.F., Approval Yes AD Related Paragraph 1.H., Weight and Balance Changes Yes Weight and Balance Change Paragraph 1.I., Electrical Load Data No Electrical Load Changed Paragraph 1.K., Publications Affected Yes Publications Affected Paragraph 1.K., Publications Affected No Airplane Flight Operations Affected (Flight CrewOperations Manual and/or FAA Approved Airplane Flight Manual) Paragraph 2.C.1., Kits/Parts Yes Kits/Parts Required Paragraph 2.C.2., Parts and Materials Supplied by the Operator No Operator Supplied Parts/Material Paragraph 2.F., Special Tooling Necessary to do this Service Bulletin No Special 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 Revision 1: February 26, 2016 8of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT INDUSTRY SUPPORT INFORMATION** 

Boeing warranty remedies are available for airplanes in warranty as of March 12, 2014. Please refer toParagraph 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 inAPPENDIX Bof 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 Revision 1: February 26, 2016 9of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 10of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**

### Commercial **Airplanes** 

# 747

Service Bulletin **ALERT Number:**  **747-57A2348** Original Issue: June 12, 2015 Revision 1: February 26, 2016 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, and 1510-1514 in10Groups. 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 D6-30300Part 3 for Airplane Variable Number, Line Number, and Serial Number data. **DESCRIPTION CONFIGURATION**  **GROUP** 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 Revision 1: February 26, 2016 11of78**DESCRIPTION CONFIGURATION**  **GROUP** 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 **Group Variable Number**  5 RC001 - RC005 7 RC006 - RC009 5 RC022 - RC023 7 RC024 - RC034 9 RC035 - RC036 10 RC037 - RC040 7 RC066 10 RC067 - RC069 1 RC501 2 RC502 3 RC503 4 RC504 6 RC505 - RC511 8 RC512 1 RC521 2 RC522 3 RC523 6 RC524 - RC528

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 12of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group**  **Variable Number** 3 RC541 3 RC546 6 RC547 - RC549 3 RC551 - RC553 4 RC554 - RC557 6 RC558 - RC563 8 RC564 3 RC571 - RC572 4 RC573 - RC576 6 RC577 - RC582 3 RC601 4 RC602 6 RC603 - RC605 6 RC641 - RC642 8 RC671 - 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 torque brake trip, which will then cause additional loading on the Transmission Aft Bearing Plate

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 13of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 SB747-57-2347at that flap track only. Repeat inspections given in SB747-57-2347must continue at all flap tracks where the modification given in this SB has not been completed. BoeingService Related Problem (SRP)747-8-SRP-57-0269is related to this service bulletin. As a part of a service bulletin validation program, this change was completed on airplane RC504 by Service Bulletin 747-57A2348 Original Issue before the release of Revision 1 of this service bulletin. The change completed on airplane RC504 by Service Bulletin 747-57A2348 Original Issue is equivalent to the release of Revision 1 of this service bulletin. Airplane RC504 has the configuration of a Group 4 airplane. Revision 1 is sent to incorporate changes to the access requirements and kit found to be necessary during the validation of the original issue. **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. Effects of this Revision on airplanes on which Original Issue was previously done: None. The work in this service bulletin is done in the maintenance zone(s) given below. **Group 1-4, 6, 8: Affected Maintenance Zones**  **Zone Model**  561, 563, 565, 567, 661, 663, 665, 667 747-8F **Group 5, 7, 9-10: Affected Maintenance Zones**  **Zone Model**  561, 563, 565, 567, 661, 663, 665, 667 747-8

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 14of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT 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. **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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 1 1.00 1.00 1 FIGURE 9 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL 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 Revision 1: February 26, 2016 15of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Work Package 1 - Flap Track 1 Transmission Aft Bearing Plate Assembly Replacement**  **Elapsed Hours Task Hours**  **Number of Persons Task**  (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 2 1.00 1.00 1 FIGURE 10 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 3 1.00 1.00 1 FIGURE 11 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. Work Package Number 3 can be done at the same time as Work Packages 1, 2, 4, 5, 6, 7, and 8

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 16of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Work Package 4 - Flap Track 4 Transmission Aft Bearing Plate Assembly Replacement**  **Elapsed Hours Task Hours**  **Number of Persons Task**  2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 4 1.00 1.00 1 FIGURE 12 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 5 1.00 1.00 1 FIGURE 13 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 6

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 17of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Work Package 6 - Flap Track 6 Transmission Aft Bearing Plate Assembly Replacement**  **Elapsed Hours Task Hours**  **Number of Persons Task**  1.00 1.00 1 FIGURE 14 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 7 1.00 1.00 1 FIGURE 15 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access 6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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 Hours**  **Task Hours Number of Persons**  **Task** 2.20 6.60 3 Access 1.00 (a) 2.00 (a) 2 Disconnect Actuator Ball Screw Nut 0.75 0.75 1 FIGURE 8 1.00 1.00 1 FIGURE 16 1.00 (a) 2.00 (a) 2 Connect Actuator Ball Screw Nut 2.70 8.10 3 Close Access

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 18of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Work Package 8 - Flap Track 8 Transmission Aft Bearing Plate Assembly Replacement**  **Elapsed Hours Task Hours**  **Number of Persons Task**  6.65 16.45 TOTAL FOR EACH FLAP TRACK (a) These tasks are optional and are not included in the total given. If these tasks are accomplished, the time shown must be added to the total given. 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

+8.50 All **I. Electrical Load Data**  Not changed. **J. References**  1. Existing Data: a. Engineering Change Memo PRR 85901-140S b. Boeing Service Bulletin747-57-2347 c. Boeing Service Letter747-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)27-51-00,27-51-01,27-51-04,27-51-26,27-51-31, 27-51-33,27-51-46 2. Data Supplied with this Service Bulletin: None. 3. Installation Drawings Used in the Preparation of this Service Bulletin: **Title Drawing Number**  TRACK INSTL - OUTBOARD FLAP, TRACK NO. 1 AND NO. 8 113U1150 TRACK INSTL - OUTBOARD FLAP, TRACK NO. 2 AND NO. 7 113U1250 TRACK INSTL - INBOARD FLAP, TRACK NO. 3 AND NO. 6 113U1350

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 19of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Title** 

**Drawing Number** TRACK INSTL - INBOARD FLAP, TRACK NO. 4 AND NO. 5 113U1450 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: **Chapter-Section Publication**  27-51, 27-50 747 Fault Isolation Manual 27-51 747 Illustrated Parts Catalog 57-52 Component 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 Revision 1: February 26, 2016 20of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT 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)**  **QTY Date**  **Name Kit Number** 

43,787.00 545 20 03/07/16 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-2

43,787.00 545 20 04/04/16 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-2

43,787.00 545 20 05/02/16 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-2

43,787.00 545 7 05/31/16 TOP KIT, RETROFIT - WING TE FLAP TRANSMISSION AFT ATTACH FITTINGS REPLACEMENT 015U2129-2

**NOTE:** The 015U2129-1 Top Kit is no longer available. Operators that have a 015U2129-1 Top Kit can complete the work given in this service bulletin by providing four additional BACP18BC04A10P pins and four additional BACW10BP9APU washers. Operators are encouraged to complete the survey provided inAPPENDIX Bof 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 Revision 1: February 26, 2016 21of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT 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 14**  **13 12**  **11 10**  **9 Top Kit**  1 1 1 1 1 1 015U2129-2 **Figure Kit 16**  **15 Top Kit**  1 1 015U2129-2 **ALL KIT 015U2129-2** 

**Notes Existing Part**  **Number Name**  **Figure New Part Number**  **14 13**  **12 11**  **10 9**  **Qty**

- TRANSMISSION AFT BEARING PLATE ASSY . . . . . 1 113U1192-5

- TRANSMISSION AFT BEARING PLATE ASSY . . . . 1 . 113U1292-5

- TRANSMISSION AFT BEARING PLATE ASSY . . . 1 . . 113U1392-5

- TRANSMISSION AFT BEARING PLATE ASSY 1 . . . . . 113U1392-6

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 22of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT ALL** 

**KIT 015U2129-2**

**Notes Existing Part**  **Number Name**  **Figure New Part Number**  **14 13**  **12 11**  **10 9**  **Qty**

- TRANSMISSION AFT BEARING PLATE ASSY . . 1 . . . 113U1492-7

- TRANSMISSION AFT BEARING PLATE ASSY . 1 . . . . 113U1492-8

- NUT, CASTELLAT- ED 2 . . 2 . . BACN11N107CS

- NUT
. . . . 2 2 BACN11N108CS

- NUT, CASTELLAT- ED . 2 2 . . . BACN11N110CS

- NUT, CASTELLAT- ED 2 . . 2 2 2 BACN11N7CS

- NUT, CASTELLAT- ED . 2 2 . . . BACN11N9CS

- PIN 4 . . 4 4 4 BACP18BC03A08P

- PIN
. 4 4 . . . BACP18BC04A10P

- WASHER
. 6 6 . . . BACW10BP10APU

- WASHER 12 . . 12 4 4 BACW10BP7APU

- WASHER
. . . . 4 6 BACW10BP8APU

- WASHER
. 4 4 . . . BACW10BP9APU

**ALL KIT 015U2129-2** 

**Notes Existing Part**  **Number Name**  **Figure New Part Number**  **16**

**15 Qty** 

-

TRANSMISSION AFT BEARING PLATE ASSY 1 . 113U1192-6

- TRANSMISSION AFT BEARING PLATE ASSY . 1 113U1292-6

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 23of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT ALL**  **KIT 015U2129-2**

**Notes Existing Part**  **Number Name**  **Figure New Part Number**  **16**

**15 Qty** 

-

NUT 2 2 BACN11N108CS

- NUT, CASTELLAT- ED 2 2 BACN11N7CS

- PIN 4 4 BACP18BC03A08P

- WASHER 4 4 BACW10BP7APU

- WASHER 6 4 BACW10BP8APU 2. Parts and Materials Supplied by the Operator None. 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: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number** (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-1 (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-2 (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-5 (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-6 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-1 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-2

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 24of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 1:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-1 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-2 (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: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number** (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-3 (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-4 (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-5 (a) - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-6 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-1 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-2 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-1 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-2 (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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 25of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 3:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-3 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-4 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-1 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-2 (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 4: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number**

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 26of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 4:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-5 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-6 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-1 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-2 (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: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number**

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-101 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-102

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 27of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 5:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-101 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-102 (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: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number** (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1 113U1151-7 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1 113U1151-8 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1 113U1251-9 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1 113U1251-10 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1 113U1351-7 (a) - INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1 113U1351-8 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1 113U1451-3 (a) - INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1 113U1451-4

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 28of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 6:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-5 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-6 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-5 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-6 (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. **Group 7: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number** (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1 113U1151-7 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1 113U1151-8 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1 113U1251-9 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1 113U1251-10

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 29of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 7:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number**  (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1 113U1351-103 (a) - INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1 113U1351-104 (a) - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1 113U1451-103 (a) - INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1 113U1451-104

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-101 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-102 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-105 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-106 (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 Revision 1: February 26, 2016 30of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 8:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1151-11 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1 113U1151-9

- 113U1151-12 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1 113U1151-10

- 113U1251-13 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1 113U1251-11

- 113U1251-14 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1 113U1251-12

- 113U1351-21 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1 113U1351-9

- 113U1351-22 INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1 113U1351-10

- 113U1451-19 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1 113U1451-7

- 113U1451-20 INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1 113U1451-8

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8

- 113U1351-23 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-11

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 31of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 8:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1351-24 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-12

- 113U1451-21 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-9

- 113U1451-22 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-10 (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: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number**

- 113U1151-11 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1 113U1151-9

- 113U1151-12 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1 113U1151-10

- 113U1251-13 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1 113U1251-11

- 113U1251-14 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1 113U1251-12

- 113U1351-109 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1 113U1351-105

- 113U1351-110 INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1 113U1351-106

- 113U1451-111 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1 113U1451-107

- 1131451-112 INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1 113U1451-108

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 32of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 9:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8

- 113U1351-111 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-107

- 113U1351-112 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-108 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-105 (a) - TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-106 (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 10: Notes**  **New Part Number Name**  **QTY Existing Part**  **Number**

- 113U1151-11 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 1 113U1151-9

- 113U1151-12 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 8 1 113U1151-10

- 113U1251-13 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 1 113U1251-11

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 33of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT Group 10:**  **Notes New Part Number**  **Name QTY**  **Existing Part Number** 

- 113U1251-14 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 7 1 113U1251-12

- 113U1351-109 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 1 113U1351-105

- 113U1351-110 INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 6 1 113U1351-106

- 113U1451-111 INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 1 113U1451-107

- 113U1451-112 INTEGRATED TRACK ASSY - INBOARD FLAP, TRACK NO. 5 1 113U1451-108

- 113U1151-13 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 1 1 113U1151-5

- 113U1151-14 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 8 1 113U1151-6

- 113U1251-15 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 1 113U1251-7

- 113U1251-16 TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 7 1 113U1251-8

- 113U1351-111 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 3 1 113U1351-107

- 113U1351-112 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 6 1 113U1351-108

- 113U1451-113 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 4 1 113U1451-109

- 113U1451-114 TRACK ASSY - IN- BOARD FLAP, TRACK NO. 5 1 113U1451-110 (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.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 34of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Revision 1: February 26, 2016 35of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 36of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**

BLANK PAGE**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 toSOPM 20-50-01for 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 Revision 1: February 26, 2016 37of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Letter747-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 Revision 1: February 26, 2016 38of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Revision 1: February 26, 2016 39of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Revision 1: February 26, 2016 40of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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: Disconnect 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 to747-8 AMM 27-51-00as an accepted procedure. (2) Remove the Outboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-31 as an accepted procedure. (3) Remove the Outboard Flap Track Aft Fairing. Refer to747-8 AMM 27-51-31as an accepted procedure. (4) Install the transmission removal and installation equipment. Refer to747-8 AMM 27-51-33 as an accepted procedure. (5) If necessary, disconnect the ball screw from the actuator attach gimbal fitting to get sufficient access. Refer to747-8 AMM 27-51-46as an accepted procedure. b. OPTION 2: Disconnect the Flap Transmission as follows: (1) Extend and deactivate all trailing edge flaps. Refer to747-8 AMM 27-51-00as an accepted procedure. (2) Prepare for the Removal of the Flap Transmission. Refer to747-8 AMM 27-51-33as 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 27-51-33as an accepted procedure. (4) Disconnect the ball screw from the transmission. Refer to747-8 AMM 27-51-33as an accepted procedure. (5) Install the transmission removal and installation equipment. Refer to747-8 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 Revision 1: February 26, 2016 41of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT PART 2: INBOARD ACCESS** 

1. Do one of the following options: **NOTE:** OPTION 2: Disconnect 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 to747-8 AMM 27-51-00as an accepted procedure. (2) Remove the Inboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-26 as an accepted procedure. (3) Remove the Inboard Flap Track Aft Fairing. Refer to747-8 AMM 27-51-26as an accepted procedure. (4) Install the transmission removal and installation equipment. Refer to747-8 AMM 27-51-33 as an accepted procedure. (5) If necessary, disconnect the ball screw from the actuator attach gimbal fitting to get sufficient access. Refer to747-8 AMM 27-51-46as an accepted procedure. b. OPTION 2: Disconnect the Flap Transmission as follows: (1) Extend and deactivate all trailing edge flaps. Refer to747-8 AMM 27-51-00as an accepted procedure. (2) Prepare for the Removal of the Flap Transmission. Refer to747-8 AMM 27-51-33as 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 27-51-33as an accepted procedure. (4) Disconnect the ball screw from the transmission. Refer to747-8 AMM 27-51-33as an accepted procedure. (5) Install the transmission removal and installation equipment. Refer to747-8 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. If the ball screw was disconnected during access, re-connect the ball screw to the actuator attach gimbal fitting. Refer to747-8 AMM 27-51-46as an accepted procedure. b. Remove the transmission removal and installation equipment. Refer to747-8 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 Revision 1: February 26, 2016 42of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**c. Install the Outboard Flap Track Aft Fairing. Refer to747-8 AMM 27-51-31as an accepted procedure. d. Install the Outboard Flap Track Forward Fairing. Refer to747-8 AMM 27-51-31as an accepted procedure. e. Do a Check of the Flap Position. Refer to747-8 AMM 27-51-04as an accepted procedure. f. Do a Trailing Edge Flap System - System Test. Refer to747-8 AMM 27-51-00as 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 to747-8 AMM 27-51-33 as an accepted procedure. b. Attach the ball screw to the transmission. Refer to747-8 AMM 27-51-33as an accepted procedure. c. Connect the applicable torque tubes to the transmission. Refer to 747-8 AMM 27-51-33as an accepted procedure. d. Install the Outboard Flap Track Forward Fairing. Refer to747-8 AMM 27-51-31as an accepted procedure. e. Do the Outboard Trailing Edge Flap - Adjustment. Refer to747-8 AMM 27-51-04as an accepted procedure. f. Do a Check of the Flap Position. Refer to747-8 AMM 27-51-04as an accepted procedure. g. Do a Trailing Edge Flap System - System Test. Refer to747-8 AMM 27-51-00as an accepted procedure. **PART 4: CLOSE INBOARD ACCESS** 1. If OPTION 1 was used for PART 2: INBOARD ACCESS, do the following: a. If the ball screw was disconnected during access, re-connect the ball screw to the actuator attach gimbal fitting. Refer to747-8 AMM 27-51-46as an accepted procedure. b. Remove the transmission removal and installation equipment. Refer to747-8 AMM 27-51-33 as an accepted procedure. c. Install the Inboard Flap Track Aft Fairing. Refer to747-8 AMM 27-51-26as an accepted procedure. d. Install the Inboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-26as an accepted procedure. e. Do a Check of the Flap Position. Refer to747-8 AMM 27-51-01as an accepted procedure. f. Do a Trailing Edge Flap System - System Test. Refer to747-8 AMM 27-51-00as an accepted procedure.
Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 43of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**2. If OPTION 2 was used for PART 2: INBOARD ACCESS, do the following: a. Remove the transmission removal and installation equipment. Refer to747-8 AMM 27-51-33 as an accepted procedure. b. Attach the ball screw to the transmission. Refer to747-8 AMM 27-51-33as an accepted procedure. c. Connect the applicable torque tubes to the transmission. Refer to 747-8 AMM 27-51-33as an accepted procedure. d. Install the Inboard Flap Track Forward Fairing. Refer to 747-8 AMM 27-51-26as an accepted procedure. e. Do the Inboard Trailing Edge Flap - Adjustment. Refer to747-8 AMM 27-51-01as an accepted procedure. f. Do a Check of the Flap Position. Refer to747-8 AMM 27-51-01as an accepted procedure. g. Do a Trailing Edge Flap System - System Test. Refer to747-8 AMM 27-51-00as an accepted procedure.

Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1: February 26, 2016 44of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 1:**  **FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 45of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 6 - Washer Remove Under head. 2 BACW10BP8CD Washer Remove / Keep

- 2 BACB30NR8DK21 Bolt Remove / Keep Head side. 2 BACB28AK08-039 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7DK20. 4 - Washer Remove

Under head. 2 BACW10BP7ACU Washer Remove / Keep

- 2 BACB30NR7DK20 OR BACB30LE7DK20 Bolt Remove / Keep Head side. 2 BACB28AK07-039 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 46of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 2:**  **FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 47of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 4 - Washer Remove Under head. 2 BACW10BP8CD Washer Remove / Keep

- 2 BACB30LT8DK22 Bolt Remove / Keep Head side. 2 BACB28AK08-042 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30LT7DK22. 2 washers are used for BACB30LE7DK22. 4 - Washer Remove

Under head. 2 BACW10BP7ACU Washer Remove / Keep

- 2 BACB30LT7DK22 OR BACB30LE7DK22 Bolt Remove / Keep Head side. 2 BACB28AK07-044 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 48of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 3:**  **FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 49of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 8 - Washer Remove Under head. 2 BACW10BP7CD Washer Remove / Keep

- 2 BACB30NR7DK21 Bolt Remove / Keep Head side. 2 BACB28AK07-041 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7BD20. 4 - Washer Remove

Under head. 2 BACW10BP7ACU Washer Remove / Keep

- 2 BACB30NR7DK20 OR BACB30LE7BD20 Bolt Remove / Keep Head side. 2 BACB28AK07-040 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 50of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 4:**  **FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 51of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 6 - Washer Remove Under head. 2 BACW10BP10CD Washer Remove / Keep

- 2 BACB30NR10DK27 Bolt Remove / Keep Head side. 2 BACB28AK10-053 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30NR9DK24. 2 washers are used for BACB30LE9BD24. 4 - Washer Remove

Under head. 2 BACW10BP9ACU Washer Remove / Keep

- 2 BACB30NR9DK24 OR BACB30LE9BD24 Bolt Remove / Keep Head side. 2 BACB28AK09-042 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 52of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 5:**  **FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 53of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 6 - Washer Remove Under head. 2 BACW10BP10CD Washer Remove / Keep

- 2 BACB30NR10DK27 Bolt Remove / Keep Head side. 2 BACB28AK10-053 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30NR9DK24. 2 washers are used for BACB30LE9BD24. 4 - Washer Remove

Under head. 2 BACW10BP9ACU Washer Remove / Keep

- 2 BACB30NR9DK24 OR BACB30LE9BD24 Bolt Remove / Keep Head side. 2 BACB28AK09-042 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 54of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 6:**  **FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 55of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 8 - Washer Remove Under head. 2 BACW10BP7CD Washer Remove / Keep

- 2 BACB30NR7DK21 Bolt Remove / Keep Head side. 2 BACB28AK07-041 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7BD20. 4 - Washer Remove

Under head. 2 BACW10BP7ACU Washer Remove / Keep

- 2 BACB30NR7DK20 OR BACB30LE7BD20 Bolt Remove / Keep Head side. 2 BACB28AK07-040 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 56of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 7:**  **FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 57of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 4 - Washer Remove Under head. 2 BACW10BP8CD Washer Remove / Keep

- 2 BACB30LT8DK22 Bolt Remove / Keep Head side. 2 BACB28AK08-042 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30LT7DK22. 2 washers are used for BACB30LE7DK22. 4 - Washer Remove

Under head. 2 BACW10BP7ACU Washer Remove / Keep

- 2 BACB30LT7DK22 OR BACB30LE7DK22 Bolt Remove / Keep Head side. 2 BACB28AK07-044 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 58of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 8:**  **FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - REMOVAL (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 59of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 2 - Cotter Pin Remove 1

- 2 - Nut Remove Under nut. 6 - Washer Remove Under head. 2 BACW10BP8CD Washer Remove / Keep

- 2 BACB30NR8DK21 Bolt Remove / Keep Head side. 2 BACB28AK08-039 Bushing Remove / Keep

- 2 - Cotter Pin Remove 2

- 2 - Nut Remove Under nut. 1 washer is used for BACB30NR7DK20. 2 washers are used for BACB30LE7DK20. 4 - Washer Remove

Under head. 2 BACW10BP7ACU Washer Remove / Keep

- 2 BACB30NR7DK20 OR BACB30LE7DK20 Bolt Remove / Keep Head side. 2 BACB28AK07-039 Bushing Remove / Keep

- - - TRANSMISSION AFTBEARING PLATE ASSEMBLY Remove 3

**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 Revision 1 February 26, 2016 60of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 9:**  **FLAP TRACK 1 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 61of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1192-5 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK07-039 Bushing Install (Kept)

- 2 BACB30NR8DK21 Bolt Install (Kept) Under head. 2 BACW10BP8CD Washer Install (Kept) Under nut. 6 BACW10BP8APU WASHER Install (New)

- 2 BACN11N108CS NUT Install (New)

- 2 BACP18BC03A08P PIN Install (New) Head side. 2 BACB28AK07-039 Bushing Install (Kept) 2

- 2 BACB30NR7DK20 OR BACB30LE7DK20 Bolt Install (Kept) Under head. 2 BACW10BP7ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30NR7DK20.2 washers are required for BACB30LE7DK20. 4 BACW10BP7APU WASHER Install (New)

- 2 BACN11N7CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 Identify 3 (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 Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,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 Revision 1 February 26, 2016 62of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 10:**  **FLAP TRACK 2 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 63of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1292-5 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK08-042 Bushing Install (Kept)

- 2 BACB30LT8DK22 Bolt Install (Kept) Under head. 2 BACW10BP8CD Washer Install (Kept) Under nut. 4 BACW10BP8APU WASHER Install (New)

- 2 BACN11N108CS NUT Install (New)

- 2 BACP18BC03A08P PIN Install (New) Head side. 2 BACB28AK07-044 Bushing Install (Kept) 2

- 2 BACB30LT7DK22 OR BACB30LE7DK22 Bolt Install (Kept) Under head. 2 BACW10BP7ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30LT7DK22.2 washers are required for BACB30LE7DK22. 4 BACW10BP7APU WASHER Install (New)

- 2 BACN11N7CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 Identify 3 (a) - - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 10: FLAP TRACK 2 - 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 Revision 1 February 26, 2016 64of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 11:**  **FLAP TRACK 3 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 65of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1392-5 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK07-041 Bushing Install (Kept)

- 2 BACB30NR7DK21 Bolt Install (Kept) Under head. 2 BACW10BP7CD Washer Install (Kept) Under nut. 8 BACW10BP7APU WASHER Install (New)

- 2 BACN11N107CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) Head side. 2 BACB28AK07-040 Bushing Install (Kept) 2

- 2 BACB30NR7DK20 OR BACB30LE7BD20 Bolt Install (Kept) Under head. 2 BACW10BP7ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30NR7DK20.2 washers are required for BACB30LE7BD20. 4 BACW10BP7APU WASHER Install (New)

- 2 BACN11N7CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 Identify 3 (a) - - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 3 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 11: FLAP TRACK 3 - 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 Revision 1 February 26, 2016 66of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 12:**  **FLAP TRACK 4 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 67of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1492-7 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK10-053 Bushing Install (Kept)

- 2 BACB30NR10DK27 Bolt Install (Kept) Under head. 2 BACW10BP10CD Washer Install (Kept) Under nut. 6 BACW10BP10APU WASHER Install (New)

- 2 BACN11N110CS NUT, CASTELLATED Install (New)

- 2 BACP18BC04A10P PIN Install (New) Head side. 2 BACB28AK09-042 Bushing Install (Kept) 2

- 2 BACB30NR9DK24 OR BACB30LE9BD24 Bolt Install (Kept) Under head. 2 BACW10BP9ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30NR9DK24.2 washers are required for BACB30LE9BD24. 4 BACW10BP9APU WASHER Install (New)

- 2 BACN11N9CS NUT, CASTELLATED Install (New)

- 2 BACP18BC04A10P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 Identify 3 (a) - - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 4 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 12: FLAP TRACK 4 - 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 Revision 1 February 26, 2016 68of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 13:**  **FLAP TRACK 5 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 69of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1492-8 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK10-053 Bushing Install (Kept)

- 2 BACB30NR10DK27 Bolt Install (Kept) Under head. 2 BACW10BP10CD Washer Install (Kept) Under nut. 6 BACW10BP10APU WASHER Install (New)

- 2 BACN11N110CS NUT, CASTELLATED Install (New)

- 2 BACP18BC04A10P PIN Install (New) Head side. 2 BACB28AK09-042 Bushing Install (Kept) 2

- 2 BACB30NR9DK24 OR BACB30LE9BD24 Bolt Install (Kept) Under head. 2 BACW10BP9ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30NR9DK24.2 washers are required for BACB30LE9BD24. 4 BACW10BP9APU WASHER Install (New)

- 2 BACN11N9CS NUT, CASTELLATED Install (New)

- 2 BACP18BC04A10P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 4 Identify 3 (a) - - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 4 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 13: FLAP TRACK 5 - 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 Revision 1 February 26, 2016 70of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 14:**  **FLAP TRACK 6 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 71of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1392-6 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK07-041 Bushing Install (Kept)

- 2 BACB30NR7DK21 Bolt Install (Kept) Under head. 2 BACW10BP7CD Washer Install (Kept) Under nut. 8 BACW10BP7APU WASHER Install (New)

- 2 BACN11N107CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) Head side. 2 BACB28AK07-040 Bushing Install (Kept) 2

- 2 BACB30NR7DK20 OR BACB30LE7BD20 Bolt Install (Kept) Under head. 2 BACW10BP7ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30NR7DK20.2 washers are required for BACB30LE7BD20. 4 BACW10BP7APU WASHER Install (New)

- 2 BACN11N7CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 3 Identify 3 (a) - - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 3 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 14: FLAP TRACK 6 - 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 Revision 1 February 26, 2016 72of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 15:**  **FLAP TRACK 7 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 73of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1292-6 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK08-042 Bushing Install (Kept)

- 2 BACB30LT8DK22 Bolt Install (Kept) Under head. 2 BACW10BP8CD Washer Install (Kept) Under nut. 4 BACW10BP8APU WASHER Install (New)

- 2 BACN11N108CS NUT Install (New)

- 2 BACP18BC03A08P PIN Install (New) Head side. 2 BACB28AK07-044 Bushing Install (Kept) 2

- 2 BACB30LT7DK22 OR BACB30LE7DK22 Bolt Install (Kept) Under head. 2 BACW10BP7ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30LT7DK22.2 washers are required for BACB30LE7DK22. 4 BACW10BP7APU WASHER Install (New)

- 2 BACN11N7CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 2 Identify 3 (a) - - TRACK ASSY - OUT- BOARD FLAP, TRACK NO. 2 Identify (a) Mark the new part number. Refer to Paragraph 2.C.3., Parts Modified and Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 15: FLAP TRACK 7 - 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 Revision 1 February 26, 2016 74of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT FIGURE 16:**  **FLAP TRACK 8 - TRANSMISSION AFT BEARING PLATE ASSEMBLY - INSTALLATION (SHEET 1 OF 2)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 75of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**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 Data Qty**  **Identification Name**  **Task Step** 

- 1 113U1192-6 TRANSMISSION AFTBEARING PLATE ASSY Install (New) 1
Head side. 2 BACB28AK07-039 Bushing Install (Kept)

- 2 BACB30NR8DK21 Bolt Install (Kept) Under head. 2 BACW10BP8CD Washer Install (Kept) Under nut. 6 BACW10BP8APU WASHER Install (New)

- 2 BACN11N108CS NUT Install (New)

- 2 BACP18BC03A08P PIN Install (New) Head side. 2 BACB28AK07-039 Bushing Install (Kept) 2

- 2 BACB30NR7DK20 OR BACB30LE7DK20 Bolt Install (Kept) Under head. 2 BACW10BP7ACU Washer Install (Kept) Under nut. 1 washer is required for BACB30NR7DK20.2 washers are required for BACB30LE7DK20. 4 BACW10BP7APU WASHER Install (New)

- 2 BACN11N7CS NUT, CASTELLATED Install (New)

- 2 BACP18BC03A08P PIN Install (New) (a) - - INTEGRATED TRACK ASSY - OUTBOARD FLAP, TRACK NO. 1 Identify 3 (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 Reidentifiedfor new part numbers. Refer to SOPM 20-50-10, Code RH,as an accepted procedure.

**FIGURE 16: FLAP TRACK 8 - 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 Revision 1 February 26, 2016 76of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT APPENDIX A:** **DELETED (SHEET 1 OF 1)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 77of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT APPENDIX B:** **PART DEMAND INTENT (SHEET 1 OF 1)**  Export Controlled ECCN: 9E991 - BOEING PROPRIETARY - Copyright © Unpublished Work - See page 1 for details. Original Issue: June 12, 2015 747-57A2348 Revision 1 February 26, 2016 78of78 **BOEING SERVICE BULLETIN 747-57A2348 ALERT**  **ALERT**