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Commercial Airplanes 757 Requirements Bulletin ALERT Number: 757-29A0071 RB Original Issue: November 16, 2023 Revision 1: May 28, 2026 ATA System: 2922 SUBJECT: HYDRAULIC POWER - Hydraulic Power Transfer Unit System - Relay Installation and Wire Bundle Replacement EXPORT CONTROLLED - This technology or software is subject to the U.S. Export Administration Regulations (EAR), (15 C.F.R. Parts 730-774). No authorization from the U.S. Department of Commerce is required for export, re-export, in-country transfer, or access EXCEPT to country group E:1 or E:2 countries/persons per Supp.1 to Part 740 of the EAR.
9E991ECCN:
Copyright © 2026 The Boeing Company 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: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 1 of 286
4.0
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 2 of 286 REQUIREMENTS BULLETIN 757-29A0071
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BLANK PAGE
Table of Contents
Revision Transmittal Sheet7
1. EFFECTIVITY ............................................... 1 3 A. Airplanes ............................................... 1 3 B. Spares Affected ........................................... 1 7
2. CONCURRENT REQUIREMENTS .................................... 1 7
3. COMPLIANCE ............................................... 1 7
4. APPROVAL ................................................ 2 1
5. ACCOMPLISHMENT INSTRUCTIONS .................................. 2 3 A. General Information ......................................... 2 3 B. Work Instructions ........................................... 2 5 FIGURE 1: P33 PANEL - RELAYS K10902 AND K10904 - INSTALLATION [Group 1-8, Configuration 1] .................................................. 3 8 FIGURE 2: P33 PANEL - WIRE BUNDLE W1230 - WIRE ROUTING [Group 1-5, 7-8, Configuration 1] . 40 FIGURE 3: P33 PANEL - WIRE BUNDLE W1230 - CHANGE [Group 1-5, 7-8, Configuration 1] .... 4 2 FIGURE 4: P33 PANEL - ELECTRICAL CONNECTOR D43312J - INSTALLATION [Group 1-8, Configuration 1 ] ................................................ 4 5 FIGURE 5: BETWEEN P11 PANEL AND P33 PANEL - WIRE BUNDLE W2360 - WIRE ROUTING [Group 1-8, Configuration 1] ...................................... 4 7 FIGURE 6: BETWEEN P11 PANEL AND P33 PANEL - WIRE BUNDLE W2360 - CHANGE [Group 1-8, Configuration 1] ......................................... 5 1 FIGURE 7: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD1090 - WIRE BUNDLE W4236 - REMOVAL [Group 1-2, 4, 8, Configuration 1] ......................... 5 3 FIGURE 8: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 1-2, Configuration 1] ........................ 5 4 FIGURE 9: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - INSTALLATION [Group 1-2, Configuration 1] ......................... 6 6 FIGURE 10: RIGHT BODY FAIRING - FEEDTHRU SEALS - INSTALLATION [Group 1-4, 7-8, Configuration 1 ] ................................................ 6 9 FIGURE 11: RIGHT FORWARD CARGO MIXBAY - WIRE BUNDLE W4236 CLAMP - INSTALLATION [Group 1-2, 4, 8, Configuration 1] ................................... 7 1 FIGURE 12: DISCONNECT BRACKET AD0880 - ELECTRICAL CONNECTOR D43412J AND WIRE BUNDLE CLAMP - INSTALLATION [Group 1-2, 8, Configuration 1] .................. 7 3 FIGURE 13: BETWEEN DISCONNECT BRACKET AD1090 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - REMOVAL [Group 1, 3, 7-8, Configuration 1] ..... 7 5 FIGURE 14: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - WIRE ROUTING [Group 1, 8, Configuration 1] ..... 7 6 FIGURE 15: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - INSTALLATION [Group 1, 8, Configuration 1] ..... 7 9 FIGURE 16: RIGHT WHEEL WELL BULKHEAD - FEEDTHRU SEALS - INSTALLATION [Group 1-8, Configuration 1] ......................................... 8 1 FIGURE 17: BETWEEN DISCONNECT BRACKET AD1090 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - REMOVAL [Group 2, Configuration 1] ......... 8 3 FIGURE 18: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - WIRE ROUTING [Group 2, Configuration 1] ...... 8 4 FIGURE 19: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - INSTALLATION [Group 2, Configuration 1] ....... 8 7 FIGURE 20: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0770 - WIRE BUNDLE W6670 - REMOVAL [Group 3, 7, Configuration 1] ........................... 8 9 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 3 of 286 REQUIREMENTS BULLETIN 757-29A0071
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FIGURE 21: BETWEEN DISCONNECT BRACKET AD0770 AND DISCONNECT BRACKET AD1090 - WIRE BUNDLE W5770 - REMOVAL [Group 3, 7, Configuration 1] ................. 9 0 FIGURE 22: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 4, Configuration 1] ......................... 9 1 FIGURE 23: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - INSTALLATION [Group 4, Configuration 1] ......................... 1 0 3 FIGURE 24: DISCONNECT BRACKET AD0880 - ELECTRICAL CONNECTOR D43412J AND WIRE BUNDLE CLAMP - INSTALLATION [Group 4, Configuration 1] .................... 1 0 6 FIGURE 25: BETWEEN DISCONNECT BRACKET AD1090 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - REMOVAL [Group 4, Configuration 1] ......... 1 0 8 FIGURE 26: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - WIRE ROUTING [Group 4, Configuration 1] ..... 1 0 9 FIGURE 27: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - INSTALLATION [Group 4, Configuration 1] ...... 1 1 2 FIGURE 28: BETWEEN P33 AND DISCONNECT BRACKET AD0881 - WIRE BUNDLE W4236 - REMOVAL [Group 5, Configuration 1] .................................. 1 1 4 FIGURE 29: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0881 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 5, Configuration 1] ......................... 1 1 5 FIGURE 30: BETWEEN P33 AND DISCONNECT BRACKET AD0881 - WIRE BUNDLE W4236 - INSTALLATION [Group 5, Configuration 1] ......................... 1 2 7 FIGURE 31: RIGHT BODY FAIRING - FEEDTHRU - INSTALLATION [Group 5, Configuration 1] . . . 130 FIGURE 32: RIGHT FORWARD CARGO MIXBAY - WIRE BUNDLE W4236 CLAMP - INSTALLATION [Group 5, Configuration 1] ....................................... 1 3 2 FIGURE 33: DISCONNECT BRACKET AD0881 - ELECTRICAL CONNECTOR D43412J - INSTALLATION [Group 5, Configuration 1] .................................. 1 3 4 FIGURE 34: BETWEEN DISCONNECT BRACKET AD0881 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - REMOVAL [Group 5, Configuration 1] ......... 1 3 6 FIGURE 35: BETWEEN DISCONNECT BRACKET AD0881 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - WIRE ROUTING [Group 5, Configuration 1] ..... 1 3 7 FIGURE 36: BETWEEN DISCONNECT BRACKET AD0881 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - INSTALLATION [Group 5, Configuration 1] ...... 1 4 0 FIGURE 37: P33 PANEL - WIRE BUNDLE W1230 - WIRE ROUTING [Group 6, Configuration 1] . . . 142 FIGURE 38: P33 PANEL - WIRE BUNDLE W1230 - CHANGE [Group 6, Configuration 1] ....... 1 4 4 FIGURE 39: BETWEEN P33 PANEL AND DISCONNECT BRACKET AE0503 - WIRE BUNDLE W4058 - REMOVAL [Group 6, Configuration 1] ............................ 1 4 7 FIGURE 40: BETWEEN E5-3 SHELF AND DISCONNECT BRACKET AE0503 - WIRE BUNDLE W1200 - REMOVAL [Group 6, Configuration 1] ............................ 1 4 8 FIGURE 41: BETWEEN DISCONNECT BRACKET AE0503 AND DISCONNECT BRACKET AD0881 - WIRE BUNDLE W4010 - REMOVAL [Group 6, Configuration 1] ................. 1 4 9 FIGURE 42: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0881 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 6, Configuration 1] ......................... 1 5 0 FIGURE 43: BETWEEN P33 AND DISCONNECT BRACKET AD0881 - WIRE BUNDLE W4236 - INSTALLATION [Group 6, Configuration 1] ......................... 1 6 2 FIGURE 44: RIGHT BODY FAIRING - FEEDTHRU - INSTALLATION [Group 6, Configuration 1] . . . 165 FIGURE 45: DISCONNECT BRACKET AD0881 - ELECTRICAL CONNECTOR D43412J - INSTALLATION [Group 6, Configuration 1] .................................. 1 6 7 FIGURE 46: BETWEEN DISCONNECT BRACKET AD0881 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - REMOVAL [Group 6, Configuration 1] ......... 1 6 9 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 4 of 286 REQUIREMENTS BULLETIN 757-29A0071
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FIGURE 47: BETWEEN DISCONNECT BRACKET AD0881 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - WIRE ROUTING [Group 6, Configuration 1] ..... 1 7 0 FIGURE 48: BETWEEN DISCONNECT BRACKET AD0881 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - INSTALLATION [Group 6, Configuration 1] ...... 1 7 3 FIGURE 49: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 7, Configuration 1] ......................... 1 7 5 FIGURE 50: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - INSTALLATION [Group 3, Configuration 1] ......................... 1 8 8 FIGURE 51: DISCONNECT BRACKET AD0880 - ELECTRICAL CONNECTOR D43412J AND WIRE BUNDLE CLAMP - INSTALLATION [Group 3, 7, Configuration 1] .................. 1 9 1 FIGURE 52: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - WIRE ROUTING [Group 3, 7, Configuration 1] .... 1 9 3 FIGURE 53: BETWEEN DISCONNECT BRACKET AD0880 AND POWER TRANSFER UNIT CONTROL VALVE - WIRE BUNDLE W2514 - INSTALLATION [Group 3, 7, Configuration 1] .... 1 9 6 FIGURE 54: FORWARD CARGO COMPARTMENT - DISCONNECT BRACKET AD0770 - DRILL HOLE [Group 3, 7, Configuration 1] ................................. 1 9 9 FIGURE 55: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 3, Configuration 1] ......................... 2 0 1 FIGURE 56: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - WIRE ROUTING [Group 8, Configuration 1] ......................... 2 1 3 FIGURE 57: MORE WORK - WIRE BUNDLE W4236 - CLAMP REPLACEMENT [Group 1-3, 7-8, Configuration 2 ] ................................................ 2 2 4 FIGURE 58: MORE WORK - WIRE BUNDLE W4236 - LACING TAPE INSTALLATION [Group 1-2, 8, Configuration 2] ........................................ 2 2 6 FIGURE 59: MORE WORK - WIRE BUNDLE W4236 - GROUND CHANGE [Group 1-2, 4, 8, Configuration 2 ] ................................................ 2 2 8 FIGURE 60: MORE WORK - WIRE BUNDLE W4236 GROUND - WIRING CHANGE [Group 1-2, 4, 8, Configuration 2] ........................................ 2 3 0 FIGURE 61: MORE WORK - WIRE BUNDLE W2514 - LACING TAPE INSTALLATION [Group 1, 3, 7-8, Configuration 2] ........................................ 2 3 1 FIGURE 62: MORE WORK - WIRE BUNDLE W2514 - LACING TAPE INSTALLATION [Group 2, Configuration 2 ] ................................................ 2 3 5 FIGURE 63: MORE WORK - WIRE BUNDLE W4236 - LACING TAPE INSTALLATION [Group 3, 7, Configuration 2] ........................................ 2 3 9 FIGURE 64: MORE WORK - WIRE BUNDLE W4236 GROUND - CHANGE [Group 3, 7, Configuration 2] ................................................. 2 4 1 FIGURE 65: MORE WORK - WIRE BUNDLE W4236 GROUND - WIRING CHANGE [Group 3, 7, Configuration 2 ] ................................................ 2 4 3 FIGURE 66: MORE WORK - WIRE BUNDLE W4236 - CLAMP REPLACEMENT [Group 4, Configuration 2] ................................................. 2 4 4 FIGURE 67: MORE WORK - WIRE BUNDLE W4236 - LACING TAPE INSTALLATION [Group 4, Configuration 2 ] ................................................ 2 4 6 FIGURE 68: MORE WORK - WIRE BUNDLE W2514 - LACING TAPE INSTALLATION [Group 4, Configuration 2 ] ................................................ 2 4 8 FIGURE 69: MORE WORK - WIRE BUNDLE W4236 - LACING TAPE INSTALLATION [Group 5, Configuration 2 ] ................................................ 2 5 2 FIGURE 70: MORE WORK - WIRE BUNDLE W2514 - LACING TAPE INSTALLATION [Group 5, Configuration 2 ] ................................................ 2 5 4 FIGURE 71: MORE WORK - WIRE BUNDLE W4236 - CLAMP REPLACEMENT [Group 6, Configuration 2] ................................................. 2 5 8 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 5 of 286 REQUIREMENTS BULLETIN 757-29A0071
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FIGURE 72: MORE WORK - WIRE BUNDLE W4236 - LACING TAPE INSTALLATION [Group 6, Configuration 2 ] ................................................ 2 6 1 FIGURE 73: MORE WORK - WIRE BUNDLE W2514 - LACING TAPE INSTALLATION [Group 6, Configuration 2 ] ................................................ 2 6 3 FIGURE 74: MORE WORK - RIGHT BODY FAIRING FEEDTHRU SEAL RING - GENERAL VISUAL INSPECTION [Group 1-4, 7-8, Configuration 2] ....................... 2 6 7 FIGURE 75: MORE WORK - RIGHT BODY FAIRING FEEDTHRU SEAL RING - GENERAL VISUAL INSPECTION [Group 6, Configuration 2] .......................... 2 6 9 FIGURE 76: MORE WORK - RIGHT BODY FAIRING FEEDTHRU SEAL RING - GENERAL VISUAL INSPECTION [Group 5, Configuration 2] .......................... 2 7 1 FIGURE 77: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - INSTALLATION [Group 7, Configuration 1] ......................... 2 7 3 FIGURE 78: BETWEEN P33 PANEL AND DISCONNECT BRACKET AD0880 - WIRE BUNDLE W4236 - INSTALLATION [Group 8, Configuration 1] ......................... 2 7 6 FIGURE 79: MORE WORK - RIGHT BODY FAIRING WIRE BUNDLE W2514 - GENERAL VISUAL INSPECTION [Group 1-3, 7-8, Configuration 2] ....................... 2 7 9 FIGURE 80: MORE WORK - RIGHT BODY FAIRING WIRE BUNDLE W2514 - GENERAL VISUAL INSPECTION [Group 4, Configuration 2] .......................... 2 8 1 FIGURE 81: MORE WORK - WIRE BUNDLE W4236 GROUND - CHANGE [Group 5, Configuration 2] . 283 FIGURE 82: MORE WORK - WIRE BUNDLE W4236 GROUND - WIRING CHANGE [Group 5, Configuration 2 ] ................................................ 2 8 5 APPENDIX A: OPERATIONAL TEST [Group 1-8, Configuration 1] .................... 2 8 6 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 6 of 286 REQUIREMENTS BULLETIN 757-29A0071
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Commercial Airplanes 757 Requirements Bulletin ALERT Revision Transmittal SheetNumber: 757-29A0071 RBOriginal Issue: November 16, 2023 Revision 1: May 28, 2026 ATA System: 2922 SUBJECT: HYDRAULIC POWER - Hydraulic Power Transfer Unit System - Relay Installation and Wire Bundle Replacement This revision includes all pages of the requirements bulletin.
COMPLIANCE INFORMATION RELATED TO THIS REVISION Federal Aviation Administration (FAA) Airworthiness Directive AD 2024-25-09 is related to Requirements Bulletin 757-29A0071 RB. The effective date of AD 2024-25-09 is February 14, 2025.
The Federal Aviation Administration (FAA) will possibly release an additional Airworthiness Directive related to Requirements Bulletin 757-29A0071 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 757-29A0071 RB mandatory.
Airplanes NL001-NL002, NL006-NL017, NU701-NU705, NU721-NU728, and NU731-NU732 have been moved from Group 1 to new Group 8 of this bulletin effectivity.
Airplanes NL101-NL109, NL141, and NL601-NL616 have been moved from Group 3 to new Group 7 of this bulletin effectivity.
Effects of this Revision on airplanes on which the Original Issue was previously done:
ActionConditionGroup Do Group 1-4, 7-8, Configuration 2, More Work - Wire Bundle Changes.
Airplanes that installed a wire bundle clamp with rubber bushing(s) and straps on wire bundle W4236 in the unpressurized area, and installed a ground wire at a different position on the ground panel. Airplanes that may not have a seal ring at the right body fairing feedthru seal installed.
1-4, 7-8 Airplanes that installed blue lacing tape or straps on wire bundle W2514 in the unpressurized area and may not have routed wire bundle W2514 through a clamp aft of disconnect bracket AD0880.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 7 of 286
ActionConditionGroup Do Group 5, Configuration 2, More Work - Wire Bundle Changes.
Airplanes that installed straps on wire bundle W4236 and blue lacing tape or straps on wire bundle W2514 in the unpressurized area. Airplanes that may not have a seal ring at the right body fairing feedthru seal installed, 5 Airplanes that installed a wire bundle W4236 ground wire at a different position on the ground panel.
Do Group 6, Configuration 2, More Work - Wire Bundle Changes.
Airplanes that installed wire bundle clamps with rubber bushing(s) and straps on wire bundle W4236, and blue lacing tape or straps on wire bundle W2514 in the unpressurized area. Airplanes that may not have a seal ring at the right body fairing feedthru seal installed.
6 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 8 of 286 REQUIREMENTS BULLETIN 757-29A0071
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ActionChange DescriptionGroupCondition No action required.W4236 has been routed through disconnect bracket AD0770.
3, 7Airplanes that have accomplished all applicable changes in this table and the changes were approved by the Boeing Organization Designation Authorization (ODA) via a FAA Form 8100-9 Existing clamp between STA 879 and STA 860 has been installed and W4236 has been routed through the butterfly clamp.
1-5, 7-8 Connector D43412J has been installed on AD0880 POS 3 or POS
11.
1-4, 7-8 Ground strap installed for GD05486S has been installed within 6 inches from the end of the overbraid sleeving.
1-2, 4, 8 Ground strap installed for GD3094S has been installed within 6 inches from the end of the overbraid sleeving.
3, 7 Instances of seal ring BACS11BD1 have been replaced with BACS11BD5 OR BACS11BD6 in the
RIGHT BODY FAIRING FEEDTHRU. Instances of sealant BMS 5-45 Class B-1/2 and B-2 have been replaced with sealant BMS 5- 37 B-1/2 or B-2 in the RIGHT BODY FAIRING FEEDTHRU.
1-6, 7-8 Clamp support after passing through AD0880 has been identified.
1-4, 7-8 W2514 routing between disconnect bracket AD0880 and power transfer control valve has white lacing tape installed. Plastic tie straps in unpressurized areas on W2514 have been removed.
1-6, 7-8 W4236 has been routed through the extended fuselage.
7-8 Instances of rubber bushing clamps in unpressurized areas on W2514 have been replaced.
1-4, 6-8 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 9 of 286 REQUIREMENTS BULLETIN 757-29A0071
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REASON FOR REVISION This revision is sent to correct errors found during the accomplishment of this service bulletin. 757-300 airplanes are moved from the existing Groups 1 and 3 to new Groups 7 and 8 because of the differences in the W4236 wire bundle routing for the extended fuselage. New Figures 49 through 55 have been added for Groups 3 and 7 airplanes. In Figures 11 and 32, wire bundle W4236, airplanes that have an existing clamp installed at a standoff location between STA 879 and STA 860, an alternative clamp and hardware configuration has been added. In Figures 8, 22 and 29, the alternate routing option for the bundle W4236 between STA 660 and STA 720 has been removed because there is only one route in this location.
On wire bundle W2514, instructions were given to use wire separation code blue lacing tape and straps between disconnect bracket AD0880/AD0881 and the power transfer unit control valve. Wire bundle W2514 is routed adjacent to existing wire bundles which have wire separation code green lacing tape installed. Instructions are given to use white lacing tape, and not blue lacing tape in this area. Also, straps are not permitted in unpressurized areas. Therefore, the use of straps has been removed for wire bundle W2514. In Figures 14, 18 and 24, aft of disconnect bracket AD0880 a missing clamp location for wire bundle W2514 routing has been added.
On wire bundle W4236, instructions were given to install wire separation code blue lacing tape and straps. It is not permitted to use straps in unpressurized areas. As a result, a footnote has been added to state that the use of straps must only be installed in pressurized areas. For some airplanes, it was found that connector D43412 could not be installed at the selected position of the disconnect bracket AD0880/AD0881, because the bracket cutout was too large for the connector. The connector position information has been changed. It was found that a ground stud location did not comply with the SWPM requirements for the maximum distance of the ground to be installed from the end of the overbraid sleeving. As a result, for Groups 1, 2, 4, 5 and 8 wire bundle W4236 ground wire has been moved to a different ground stud, and the identification of the ground has been changed.
For Groups 3 and 7, the ground stud location has been changed but the identification stays the same.
In Figures 10, 31 and 44, it was found that a seal ring could not be installed correctly onto the new seal. New seal ring part numbers have been added. Also, the use of BMS 5-45 sealant has been replaced with BMS 5-37 sealant with the option of BMS 5-45 sealant, because BMS 5-45 is difficult to remove if future work is necessary in this seal. In Figures 12, 24 and 42 instructions were given to install wire bundle clamp(s) with rubber bushing(s) in unpressurized areas. The use of rubber bushings in unpressurized areas is not permitted. The installation of clamp(s) with rubber bushing(s) in unpressurized areas have been replaced by different clamps.
These sections were changed:
– Effectivity:
– Changed airplane applicability statement.
– Moved 757-300 airplanes from Group 1 to new Group 8.
– Moved 757-300 airplanes from Group 3 to new Group 7.
– Added Configuration 2 information.
– Compliance:
– Added and changed AD information – Added group applicability.
– Added Configuration 2 tables.
– Approval, added Alternative Method of Compliance (AMOC) statement.
– General Information, added notes.
– Work Instructions:
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 10 of 286 REQUIREMENTS BULLETIN 757-29A0071
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– Added group applicability.
– Group 3, Configuration 1 table, changed information.
– Groups 7 and 8, Configuration 1, added tables.
– Added Configuration 2 tables.
– FIGURE 1 through FIGURE 48, changed group applicability.
– FIGURE 8:
– Deleted Sheet 9.
– Sheet 11, added typical information.
– Sheet 12, changed connector and ground stud position, and ground nomenclature.
– FIGURE 9:
– Sheet 1, added optional connector position, changed find numbers and ground nomenclature.
– Find number table, added parts, find numbers and footnotes.
– FIGURE 10, step table, changed seal ring and sealant part numbers.
– FIGURE 11 and FIGURE 32:
– Sheet 1, added alternative clamp configuration.
– Step table, added step. Changed and added footnotes.
– FIGURE 12:
– Sheet 1, changed wire routing, added optional connector position and removed rubber bushing.
– Step table, removed rubber bushing and changed clamp part number.
– FIGURE 14, sheet 1, changed wire routing information and connector position.
– FIGURE 15 and FIGURE 19:
– Sheet 1, added optional connector position. Changed and added find numbers.
– Find number table, added find number, changed lacing tape information and removed straps.
– FIGURE 16, step table, changed sealant part number.
– FIGURE 18, sheet 1, changed wire routing and added optional connector position.
– FIGURE 21, sheet 1, changed illustration.
– FIGURE 22:
– Deleted Sheet 9.
– Sheet 12, changed ground stud position and nomenclature, and ground wire routing.
– FIGURE 23 and FIGURE 30:
– Sheet 1, changed ground nomenclature. Changed and added find numbers.
– Find number table, added parts and footnotes.
– FIGURE 24:
– Sheet 1, removed rubber bushing and changed view information.
– Step table, removed rubber bushing and changed clamp part number.
– FIGURE 26, sheet 1, changed wire routing.
– FIGURE 27, FIGURE 36 and FIGURE 48, find number table, changed lacing tape information and removed straps.
– FIGURE 29:
– Deleted sheets 7 and 9.
– Sheet 29, changed ground stud position and nomenclature.
– FIGURE 31 and FIGURE 44, step table, changed seal ring and sealant part numbers.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 11 of 286 REQUIREMENTS BULLETIN 757-29A0071
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– FIGURE 32, sheet 1, added alternative clamp configuration.
– FIGURE 33 and FIGURE 45, sheet 1, changed view information.
– FIGURE 42:
– Sheet 11, removed rubber bushing and changed circle notes.
– Step table, added parts and changed clamp part number.
– FIGURE 43, find number table, added footnotes. Added and changed footnote references.
– FIGURE 49 through FIGURE 82, added.
– APPENDIX A, added group applicability.
– Group 1-8:
No further action is required.
REVISION HISTORY Service BulletinService BulletinRequirement BulletinRequirement Bulletin 757-29A0071757-29A0071757-29A0071 RB757-29A0071 RB Issue DateIssue Date November 16, 2023Original Issue:November 16, 2023Original Issue:
May 28, 2026Revision 1:May 28, 2026Revision 1:
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: November 16, 2023 757-29A0071 RBRevision 1: May 28, 2026 12 of 286 REQUIREMENTS BULLETIN 757-29A0071