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Commercial Airplanes 747 Requirements Bulletin ALERT Number: 747-32A2535 RB Original Issue: January 22, 2024 ATA System: 3211 3213 3221 SUBJECT: LANDING GEAR - Wing, Body and Nose Landing Gear - Outer Cylinder Inspection and 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 © 2024 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: January 22, 2024 747-32A2535 RB 1 of 33
6.0
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 2 of 33 REQUIREMENTS BULLETIN 747-32A2535
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Table of Contents
1. EFFECTIVITY5
A. Airplanes5
B. Spares Affected8
2. CONCURRENT REQUIREMENTS8
3. COMPLIANCE8
4. APPROVAL10
5. ACCOMPLISHMENT INSTRUCTIONS11
A. General Information11
B. Work Instructions13
FIGURE 1: NOSE LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION15
FIGURE 2: WING LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION17
FIGURE 3: BODY LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION20
APPENDIX A: AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS23
APPENDIX B: AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS24
APPENDIX C: NOSE LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR27
APPENDIX D: WING LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR30
APPENDIX E: BODY LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR32
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 3 of 33 REQUIREMENTS BULLETIN 747-32A2535
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Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 4 of 33 REQUIREMENTS BULLETIN 747-32A2535
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Commercial Airplanes 747 Requirements Bulletin ALERT Number: 747-32A2535 RB Original Issue: January 22, 2024 ATA System: 3211 3213 3221 SUBJECT: LANDING GEAR - Wing, Body and Nose Landing Gear - Outer Cylinder Inspection and Replacement
THIS DOCUMENT 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 DOCUMENT TO THE NEW OPERATOR. IF APPLICABLE SPARES HAVE BEEN SOLD, SEND THIS DOCUMENT TO THE NEW OWNER. THIS IS AN ENHANCED REQUIRED FOR COMPLIANCE DOCUMENT. THE BOEING
PROCESSES USED TO CREATE THE SERVICE BULLETIN (SB) AND THE REQUIREMENTS BULLETIN (RB) ENSURE THAT THE INFORMATION BETWEEN "RC START" AND "RC END" IN THE SB ARE IDENTICAL TO THE INFORMATION IN THE SAME SECTIONS (COMPLIANCE, WORK INSTRUCTIONS…) OF THE RB WHICH THE SB REFERS TO AS THE RELATED DOCUMENT.
1. Effectivity A. Airplanes This bulletin is applicable to 747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, 747SR Airplane(s), line number(s) 1-1419 in 1 Group(s). Where the effectivity is presented with hyphens between line numbers, the airplane applicability means "through" and "inclusive", e.g. line numbers 1-9 means line numbers 1 through 9 inclusive.
The Variable Numbers and Group Information for the applicable airplanes is given below.
DESCRIPTIONCONFIGURATIONGROUP All 747-100/ -100B/ -100B SUD/ -200B/ -200C/ -200F/ -300/ -400/ -400D/ -400F/ -747SP and 747SR airplanes.
-1 Airplane Models:
747-100, 747-100B, 747-100B SUD, 747-200B, 747-200C, 747-200F, 747-300, 747-400, 747-400D, 747-400F, 747SP, 747SR GroupVariable Number 1RA001 - RA034 1RA101 - RA115 GroupVariable Number 1RA161 - RA164 1RA201 - RA203 GroupVariable Number 1RA216 - RA217 1RA245 - RA246 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 5 of 33
GroupVariable Number 1RA251 - RA266 1RA301 - RA318 1RA351 - RA360 1RA369 - RA373 1RA401 - RA418 1RA501 - RA502 1RA521 - RA528 1RA532 - RA548 1RA551 - RA552 1RA559 - RA561 1RA581 - RA582 1RA585 1RA601 - RA602 1RA631 - RA635 1RA651 - RA652 1RA671 - RA677 1RA701 - RA702 1RA721 - RA731 1RA741 - RA745 1RA749 - RA750 1RA761 - RA762 1RA781 - RA784 1RA901 - RA916 1RB001 - RB016 1RB041 - RB044 1RB071 - RB075 1RB101 - RB102 1RB411 - RB413 1RB421 1RB601 - RB607 1RB681 - RB697 1RB711 1RB721 - RB723 GroupVariable Number 1RB741 - RB748 1RD001 - RD004 1RD021 - RD022 1RD041 - RD059 1RD071 - RD072 1RD081 - RD083 1RD091 - RD092 1RD101 - RD104 1RD121 - RD127 1RD131 - RD144 1RD166 - RD167 1RD171 - RD172 1RD181 - RD183 1RD201 - RD204 1RD221 - RD227 1RD231 - RD235 1RD241 - RD243 1RD251 - RD262 1RD271 - RD272 1RD291 - RD292 1RD301 - RD302 1RD311 1RD351 - RD358 1RD361 - RD366 1RD381 - RD383 1RD411 - RD414 1RD421 - RD426 1RD431 - RD435 1RD441 - RD442 1RD451 - RD456 1RD461 1RD471 - RD475 1RD513 - RD519 GroupVariable Number 1RD531 - RD533 1RD551 1RD561 1RD571 1RD581 - RD583 1RD591 - RD593 1RD601 - RD607 1RD621 - RD623 1RD641 - RD649 1RD651 - RD659 1RD661 1RD671 1RD681 - RD682 1RD691 - RD692 1RD701 - RD702 1RD721 - RD722 1RD741 - RD742 1RD751 - RD755 1RD761 1RD771 - RD775 1RD781 - RD783 1RD791 - RD792 1RE001 1RF001 - RF006 1RG001 - RG009 1RG091 1RG095 1RG101 - RG104 1RG121 - RG126 1RG141 - RG142 1RG161 - RG164 1RG171 - RG174 1RG191 - RG193 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 6 of 33 REQUIREMENTS BULLETIN 747-32A2535
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GroupVariable Number 1RG211 - RG213 1RG221 - RG222 1RH101 - RH102 1RH111 - RH112 1RH121 - RH122 1RJ131 - RJ133 1RJ151 - RJ152 1RJ301 - RJ303 1RJ321 - RJ322 1RJ331 - RJ333 1RL401 - RL403 1RL411 - RL436 1RL451 - RL456 1RL461 - RL462 1RL471 - RL481 1RL491 - RL492 1RL501 - RL502 1RL511 - RL516 1RL521 - RL522 1RL531 - RL534 1RL551 1RL561 - RL568 1RL571 - RL572 1RL576 - RL577 1RL579 1RL581 - RL586 1RL651 - RL655 1RL671 - RL675 1RL681 - RL684 1RL751 - RL752 1RM001 - RM007 1RM010 - RM013 1RM021 - RM024 GroupVariable Number 1RM026 - RM030 1RM036 - RM045 1RM051 - RM053 1RM071 1RM081 - RM084 1RM091 1RM096 - RM097 1RM116 - RM117 1RM126 - RM132 1RM136 - RM147 1RM156 - RM158 1RM166 - RM177 1RM191 - RM192 1RM231 - RM233 1RM241 - RM246 1RM261 - RM264 1RM316 - RM318 1RM331 - RM333 1RM341 1RM351 - RM355 1RM366 - RM367 1RM401 - RM403 1RM426 1RM431 1RM441 - RM443 1RM445 1RM801 - RM803 1RM811 - RM813 1RM851 - RM859 1RM861 - RM863 1RM871 - RM899 1RM901 - RM906 1RM911 GroupVariable Number 1RR001 - RR005 1RR021 - RR025 1RR031 1RR201 - RR206 1RR221 - RR226 1RR261 - RR267 1RR301 - RR310 1RR331 - RR332 1RR336 1RR341 - RR345 1RR361 - RR362 1RR421 - RR422 1RR431 - RR432 1RR441 - RR442 1RR451 1RR501 - RR504 1RR521 - RR522 1RR526 1RR531 1RR551 - RR556 1RR561 1RR566 1RR701 1RR721 - RR724 1RR746 - RR748 1RR851 - RR856 1RR861 - RR862 1RR951 - RR952 1RS001 - RS002 1RS201 1RS211 - RS212 1RS221 - RS222 1RS231 - RS241 Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 7 of 33 REQUIREMENTS BULLETIN 747-32A2535
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GroupVariable Number 1RS251 - RS259 1RS263 1RS265 - RS268 1RS271 - RS276 1RS291 - RS292 1RS301 - RS306 1RS311 - RS320 1RS331 - RS333 1RS341 - RS342 1RS699 1RS701 - RS703 1RS711 - RS713 1RS721 - RS722 1RS731 - RS732 1RS741 - RS743 1RS751 - RS752 1RS761 - RS762 1RS771 1RS781 - RS782 1RS786 1RT001 - RT014 1RT021 - RT022 GroupVariable Number 1RT031 - RT035 1RT041 - RT047 1RT061 1RT071 - RT075 1RT101 - RT103 1RT121 1RT131 - RT137 1RT151 - RT152 1RT161 - RT168 1RT401 - RT412 1RT431 - RT447 1RT451 - RT469 1RT471 - RT499 1RT501 - RT535 1RT551 - RT568 1RT571 - RT591 1RT601 - RT657 1RT671 - RT673 1RT681 - RT682 1RT691 - RT699 1RT701 - RT704 1RT711 - RT717 GroupVariable Number 1RT741 - RT757 1RT776 - RT777 1RT781 - RT784 1RT801 - RT803 1RT811 - RT814 1RT831 - RT837 1RT861 - RT864 1RT876 - RT880 1RT931 - RT932 1RT945 - RT949 1RT951 - RT955 1RT966 - RT967 1RU001 - RU006 1RU016 - RU017 1RU031 - RU032 1RU051 - RU052 1RU059 - RU062 1RU081 - RU083 1RU101 - RU102 1RU121 - RU132 1RU801 - RU809 1RU831 - RU841 B. Spares Affected Examine your spares supply for the part numbers and serial numbers identified in APPENDIX A and APPENDIX B of this bulletin. If any affected part numbers and serial numbers are found, refer to Work Instructions of this bulletin for the recommended action.
2. CONCURRENT REQUIREMENTS None.
3. COMPLIANCE The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to Requirements Bulletin 747-32A2535 RB. The Airworthiness Directive will make the compliance tasks and times given in Requirements Bulletin 747-32A2535 RB mandatory.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 8 of 33 REQUIREMENTS BULLETIN 747-32A2535
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Accomplish the required action(s), based on the applicable condition(s) in Table 1, in accordance with Accomplishment Instructions.
When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
Table 1: Nose Landing Gear, Wing Landing Gear, and Body Landing Gear - Outer Cylinder Part Number and Serial Number Inspection and Outer Cylinder Replacement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 46 months after the Original Issue date of Requirements Bulletin 747- 32A2535 RB.
OPTION 1: Do a check of maintenance records of the Nose Landing Gear (NLG), left and right Wing Landing Gear (WLG) and left and right Body Landing Gear (BLG) Outer Cylinder part number and serial number for any affected part numbers and serial numbers listed in AP- PENDIX A and APPENDIX B.
All Airplanes OPTION 2: Inspect the NLG, left and right WLG and left and right BLG Outer Cylinder part number and serial number for any affected part numbers and serial numbers.
--No further action is required.
CONDITION 1: NO AF- FECTED NLG, WLG, and
BLG OUTER CYLINDERS FOUND -Within 46 months after the Original Issue date of Requirements Bulletin 747- 32A2535 RB.
Replace each affected NLG Outer Cylinder with a new or serviceable NLG Outer Cylinder. (a) CONDITION 2: ANY NLG
OUTER CYLINDER PART
NUMBER AND SERIAL
NUMBER SPECIFIED IN
APPENDIX A FOUND -Within 46 months after the Original Issue date of Requirements Bulletin 747- 32A2535 RB.
Replace each affected WLG Outer Cylinder with a new or serviceable WLG Outer Cylinder. (a) CONDITION 3: ANY WLG
OUTER CYLINDER PART
NUMBER AND SERIAL
NUMBER SPECIFIED IN
APPENDIX A FOUND Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 9 of 33 REQUIREMENTS BULLETIN 747-32A2535
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Table 1: Nose Landing Gear, Wing Landing Gear, and Body Landing Gear - Outer Cylinder Part Number and Serial Number Inspection and Outer Cylinder Replacement Repeat Interval (Not to Exceed) Boeing Recommended Compliance Time ActionCondition -Within 130 months after the Original Issue date of Requirements Bulletin 747- 32A2535 RB.
Replace each affected WLG Outer Cylinder with a new or serviceable WLG Outer Cylinder. (a) CONDITION 4: ANY WLG
OUTER CYLINDER PART
NUMBER AND SERIAL
NUMBER SPECIFIED IN
APPENDIX B FOUND -Within 130 months after the Original Issue date of Requirements Bulletin 747- 32A2535 RB.
Replace each affected BLG Outer Cylinder with a new or serviceable BLG Outer Cylinder. (a) CONDITION 5: ANY BLG
OUTER CYLINDER PART
NUMBER AND SERIAL
NUMBER SPECIFIED IN
APPENDIX B FOUND
(a) A serviceable NLG, WLG, and BLG Outer Cylinder is defined as one that does not have a part number and serial number identified in APPENDIX A and APPENDIX B, or is a NLG, WLG, or BLG Outer Cylinder that has a part number and serial number identified in APPENDIX A or APPENDIX B that has been inspected, applicable on-condition corrective actions have been done, and part marked in accordance with APPENDIX C, APPENDIX D, or APPENDIX E, as applicable, of Requirements Bulletin 747-32A2535 RB.
4. APPROVAL This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). The changes specified in this document comply with the applicable regulations and are FAA approved, as well as European Union Aviation Safety Agency (EASA)/Joint Aviation Authorities (JAA) approved for all EASA/JAA approved airplanes listed in this Requirements Bulletin effectivity. This document and its approval were based on the airplane in its original Boeing delivery configuration or as modified by other Boeing changes.
If an airplane has a non-Boeing modification or repair that affects a component or system also affected by this Requirements Bulletin, the operator is responsible for obtaining appropriate regulatory agency approval before incorporating this Requirements Bulletin.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 10 of 33 REQUIREMENTS BULLETIN 747-32A2535
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5. ACCOMPLISHMENT INSTRUCTIONS A. GENERAL INFORMATION NOTE: 1. This is an Enhanced Required for Compliance document. There will be a separate Service Bulletin (SB) and a separate Requirements Bulletin (RB). If an RB is mandated by an Airworthiness Directive (AD), then all applicable requirements specified in the RB must be done. In the RB, the "Refer to the listed procedures..." column of the table(s) in the Work Instructions is for reference only. The procedures in that column are not required by the AD and are for guidance only. For the related SB, some locations are marked RC Start and RC End to identify the requirements that are restated from the RB. For the related SB, the areas between RC Start and RC End, including sub-steps and any figures identified between RC Start and RC End, must be done to comply with the AD. Therefore, an Alternative Method of Compliance (AMOC) is required for any deviations to steps between RC Start and RC End, including substeps and identified figures. For the related SB, the steps not between RC Start and RC End 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 steps between RC Start and RC End, including sub-steps and identified figures, can still be done as specified, and the airplane can be put back in an airworthy condition. Figures not required for compliance are omitted from the RB.
2. This is an Enhanced Required for Compliance document. The Boeing processes used to create the Service Bulletin (SB) and the Requirements Bulletin (RB) ensure that the information between "RC Start" and "RC End" in the SB are identical to the information in the same sections (Compliance, Work Instructions...) of the RB which the SB refers to as the related document.
3. The compliance times for the actions in WORK INSTRUCTIONS are in Compliance.
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.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 11 of 33 REQUIREMENTS BULLETIN 747-32A2535
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5. 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.
6. 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.
7. 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.
8. Use the approved fastener, process and material substitutions in accordance with SRM Chapter 51.
9. When more than one OPTION is given for a CONDITION, do only one of the OPTION numbers. When more than one ACTION is given for a CONDITION or an OPTION, do all of the ACTION numbers for that CONDITION or OPTION.
10. The instructions in 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.
11. If the length of any fastener specified in this service bulletin does not meet installation standards given in SRM Chapter 51, then a fastener of the same specification, or an approved substitute, with a length which meets the installation standards given in SRM Chapter 51 may be used. In addition, washers may be installed for fastener grip length in accordance with SRM Chapter 51. Refer to SOPM 20-50-01 for alternate full threaded fasteners (screws) needed for installation in this service bulletin.
12. Use of colors in Figures is based on guidance from the ATA e-Business Program (ATA) iSpec 2200.
13. A maintenance records check of the NLG Outer Cylinder, left and right WLG Outer Cylinder, and left and right BLG Outer Cylinder for affected part number and serial number can be done provided the part number and serial number can be conclusively determined from that check.
14. A serviceable NLG, WLG, and BLG Outer Cylinder is defined as one that does not have a part number and serial number identified in APPENDIX A and APPENDIX B, or is a NLG, WLG, or BLG Outer Cylinder that has a part number and serial number identified in APPENDIX A or APPENDIX B that has been inspected, applicable on-condition corrective actions have been done, and part marked in accordance with APPENDIX C, APPENDIX D, or APPENDIX E, as applicable, of Requirements Bulletin 747-32A2535 RB.
Export Controlled ECCN: 9E991 See page 1 for details Original Issue: January 22, 2024 747-32A2535 RB 12 of 33 REQUIREMENTS BULLETIN 747-32A2535