# Boeing Alert Requirements Bulletin 747-32A2535 RB: No revision named

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### Page 1

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

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Export Controlled ECCN: 9E991
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Original Issue: January 22, 2024
747-32A2535 RB
2 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT
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Table of Contents
1. EFFECTIVITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
A. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
B. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2. CONCURRENT REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
3. COMPLIANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. APPROVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
A. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
B. Work Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
FIGURE 1: NOSE LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
FIGURE 2: WING LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
FIGURE 3: BODY LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
APPENDIX A: AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS . . . . . . . 23
APPENDIX B: AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS . . . . . . . 24
APPENDIX C: NOSE LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
APPENDIX D: WING LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
APPENDIX E: BODY LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Export Controlled ECCN: 9E991
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Original Issue: January 22, 2024
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REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

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Export Controlled ECCN: 9E991
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Original Issue: January 22, 2024
747-32A2535 RB
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REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT
BLANK PAGE

### Page 5

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
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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
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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
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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
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Original Issue: January 22, 2024
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REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 9

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 Re-
quirements 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 num-
ber and serial number for
any affected part numbers
and serial numbers.
--No further action is re-
quired.
CONDITION 1: NO AF-
FECTED NLG, WLG, and
BLG OUTER CYLINDERS
FOUND
-Within 46 months after the
Original Issue date of Re-
quirements 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 Re-
quirements 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
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REQUIREMENTS BULLETIN 747-32A2535
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### Page 10

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 in-
spected, 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.
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Original Issue: January 22, 2024
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REQUIREMENTS BULLETIN 747-32A2535
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### Page 11

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.
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### Page 12

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.
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### Page 13

B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements
Table 1: Nose Landing Gear, Wing Landing Gear, and Body Landing Gear - Outer Cylinder Part Number
and Serial Number Inspection and Outer Cylinder Replacement
Refer to the listed proce-
dures in SB 747-32A2535
Original Issue or later
approved revisions as an
accepted procedure.
Method of ComplianceActionCondition
--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
Do PART 1: PREPARA-
TION
-OPTION 2: Inspect the
NLG, left and right WLG
and left and right BLG
Outer Cylinder part num-
ber and serial number for
any affected part numbers
and serial numbers.
-FIGURE 1
-FIGURE 2
-FIGURE 3
Do PART 8: RESTORA-
TION if PART 1 was done
-No further action is re-
quired.
CONDITION 1: NO AF-
FECTED NLG, WLG, and
BLG OUTER CYLINDERS
FOUND
Do PART 1: PREPARA-
TION if not previously
done
-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 Do PART 2: NLG RE-MOVAL AND DISASSEM-
BLY
-
Do PART 5: NLG ASSEM-
BLY AND INSTALLATION
-
Do PART 8: RESTORA-
TION
-
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
13 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 14

Table 1: Nose Landing Gear, Wing Landing Gear, and Body Landing Gear - Outer Cylinder Part Number
and Serial Number Inspection and Outer Cylinder Replacement
Refer to the listed proce-
dures in SB 747-32A2535
Original Issue or later
approved revisions as an
accepted procedure.
Method of ComplianceActionCondition
Do PART 1: PREPARA-
TION if not previously
done
-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 Do PART 3: WLG RE-MOVAL AND DISASSEM-
BLY
-
Do PART 6: WLG ASSEM-
BLY AND INSTALLATION
-
Do PART 8: RESTORA-
TION
-
Do PART 1: PREPARA-
TION if not previously
done
-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 Do PART 3: WLG RE-MOVAL AND DISASSEM-
BLY
-
Do PART 6: WLG ASSEM-
BLY AND INSTALLATION
-
Do PART 8: RESTORA-
TION
-
Do PART 1: PREPARA-
TION if not previously
done
-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 PART 4: BLG REMOVALAND DISASSEMBLY-
Do PART 7: BLG ASSEM-
BLY AND INSTALLATION
-
Do PART 8: RESTORA-
TION
-
(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 in-
spected, 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
14 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 15 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
- STEERING
COLLAR
SQUA I
SWITCH
NOSE LANDING GEAR
VIEW LOOKING DOWN  A-A  3044995
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.
FIGURE 1: NOSE LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 1 OF 2)
Original Issue: January 22, 2024
Export Controlled ECCN: 9E991  747-32A2535 RB
See page 1 for details  15 of 33

### Page 16

More DataQtyIdentificationNameTaskStep
(a)165B01469-( )OUTER CYLINDER -
NLG
Inspect1
(a) Inspect for affected part number and serial number listed in APPENDIX A.
FIGURE 1: NOSE LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
16 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 17 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
AFT
TRUNNION  TRUNNION
BEARING
DRAG
BRACE
JURI
STRU
LOWER SIDE
STRUT
WING LANDING GEAR
3045068
FIGURE 2: WING LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 1 OF 3)
Original Issue: January 22, 2024
Export Controlled ECCN: 9E991  747-32A2535 RB
See page 1 for details  17 of 33

### Page 18 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
AFT  TRUNNION
TRUNNION
BEARING
- DRAG
BRACE
LOWER SIDE
STRUT
JURY
STRUT
WING LANDING GEAR
3045073
FIGURE 2: WING LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 2 OF 3)
Original Issue: January 22, 2024
747-32A2535 RB
Export Controlled ECCN: 9E991
See page 1 for details  18 of 33

### Page 19

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)2161U1505-( ) OR
65B01430-( ) OR
65B18212-( ) OR
65B19919-( )
OUTER CYLINDER -
WLG
Inspect1
(a) Inspect for affected part number and serial number listed in APPENDIX A and APPENDIX B.
FIGURE 2: WING LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
19 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 20 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
INBD
STEERING
CYLINDER
BODY LANDING GEAR
YOKE
- SHOCK STRUT
FWD
VIEW LOOKING UP
3045019
FIGURE 3: BODY LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 1 OF 3)
Original Issue: January 22, 2024
Export Controlled ECCN: 9E991  747-32A2535 RB
See page 1 for details  20 of 33

### Page 21 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
INBD
BODY LANDING GEAR
STEERING
CYLINDER
- YOKE
SHOCK STRUT-
FWD
VIEW LOOKING UP
3045067
FIGURE 3: BODY LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 2 OF 3)
Original Issue: January 22, 2024
Export Controlled ECCN: 9E991  747-32A2535 RB
See page 1 for details  21 of 33

### Page 22

The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
More DataQtyIdentificationNameTaskStep
(a)265B05187-( )OUTER CYLINDER -
BLG
Inspect1
(a) Inspect for affected part number and serial number listed in APPENDIX B.
FIGURE 3: BODY LANDING GEAR - OUTER CYLINDER - PART NUMBER AND SERIAL NUMBER
INSPECTION
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
22 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 23

Table A1: Affected NLG Outer Cylinder Serial Numbers - Requiring Chrome Removal
to Working Inner Diameter
Serial NumberDetail Part Number
5345765B01469-4
Table A2: Affected NLG Outer Cylinder Serial Numbers - Requiring Chrome Removal
to Seal Inner Diameter
Serial NumberDetail Part Number
8936765B01469-4
Table A3: Affected WLG Outer Cylinder Serial Numbers - Requiring Chrome Removal
to Working Inner Diameter
Serial NumberDetail Part Number
754965B01430-17
APPENDIX A:  AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS
(SHEET 1 OF 1)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
23 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 24

Table B1: Affected WLG Outer Cylinder Serial Numbers - Requiring Chrome Removal
to The Packing Bore Inner Diameter
Serial NumberDetail Part Number
16161U1505-3
47
69
99
BFG3088
BFG3096
BFG3126
BFG3166
BFG3170
BFG3211
BFG3229
BFG3329
BFGM12020
CPT-0070
31161U1505-4
38
82
94
109
BFG3093
BFG3148
BFG3236
BFG3252
BFG3298
BFG3336
CPT-0142
CPT0145
APPENDIX B:  AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS
(SHEET 1 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
24 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 25

Table B1: Affected WLG Outer Cylinder Serial Numbers - Requiring Chrome Removal
to The Packing Bore Inner Diameter
Serial NumberDetail Part Number
325565B01430-17
5531
6139
6383
6543
6545
7185
7378
7567
7727
7914
341365B01430-18
6104
6635
6755
7001
7264
7410
7561
7682
7789
7818
7896
291465B18212-8
309565B19919-3
356065B19919-4
3954
APPENDIX B:  AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS
(SHEET 2 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
25 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 26

Table B2: Affected BLG Outer Cylinder Serial Numbers - Requiring Chrome Removal
to The Packing Bore Inner Diameter
Serial NumberDetail Part Number
184865B05187-15
257265B05187-29
BFG6193
BFG6215
BFG6217
BFG6230
BFG618465B05187-30
BFG6192
BFG6195
BFG6212
APPENDIX B:  AFFECTED OUTER CYLINDER PART NUMBERS AND SERIAL NUMBERS
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
26 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 27 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
SEAL INNER
DIAMETER
313
WORKING
INNER
DIAMETER
B
A-A
NOSE LANDING GEAR OUTER CYLINDER  INSPECTION AREA  3046779
(TYPICAL)
APPENDIX C: NOSE LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 1 OF 3)
Original Issue: January 22, 2024
747-32A2535 RB
Export Controlled ECCN: 9E991
See page 1 for details  27 of 33

### Page 28

The step numbers shown below agree with the numbers shown in the circle symbols in the appendix. The QTY
numbers shown below are the number of parts necessary for this appendix.
More DataQtyIdentificationNameTaskStep
(a)(b)--CHROME PLATINGRemove1
(c)165B01469-( )OUTER CYLINDER -
NLG
Inspect2
(d)(e)165B01469-( )OUTER CYLINDER -
NLG
Repair3
(f)--OUTER CYLINDER -
NLG
Identify4
(a) Remove chrome from the NLG Outer Cylinder working inner diameter for those part numbers and serial
numbers found in APPENDIX A Table A1. Refer to SOPM 20-30-02 as an accepted procedure.
(b) Remove chrome from the NLG Outer Cylinder seal inner diameter for those part numbers and serial
numbers found in APPENDIX A Table A2. Refer to SOPM 20-30-02 as an accepted procedure.
(c) Where chrome was removed, do a Nital Etch inspection for any heat damage and a Magnetic Particle
Inspection for any cracks. Refer to SOPM 20-10-02 and SOPM 20-20-01 as accepted procedures.
APPENDIX C: NOSE LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 2 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
28 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 29

More DataQtyIdentificationNameTaskStep
(d) If any heat damage or any crack is found, repair and apply chrome plate to the NLG Outer Cylinder inner
diameter surfaces in accordance with CMM 32-21-50 REPAIR 8-4 or CMM 32-21-52 or CMM 32-21-53
or CMM 32-21-57 REPAIR 1-3, as applicable.
(e) If no heat damage and no crack is found, apply chrome plate to the NLG Outer Cylinder inner diameter
surfaces. Refer to CMM 32-21-50 REPAIR 8-4 or CMM 32-21-52 or CMM 32-21-53 or CMM 32-21-57
REPAIR 1-3, as applicable, as an accepted procedure.
(f) There is no equivalent Boeing part number for the changed part. Mark on the part that the change in this
bulletin has been done adjacent to and on the same surface as the original manufacturer's permanent
part mark. Refer to SOPM 20-50-10, Electrochemical Etch Code E, Dot Peen Code DP or Vibroengraving
Code VE, as an accepted procedure. If part mark is illegible after application of finishes, refer to SOPM
20-50-10, Rubber Stamping Codes RA, RH, and RY, as an accepted procedure.
APPENDIX C: NOSE LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 3 OF 3)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
29 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 30 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
WORKING
INNER
DIAMETER
PACKING
BORE
INNER
A-A  DIAMETER
WING LANDING GEAR OUTER CYLINDER  (TYPICAL)  INSPECTION AREA  3046782
APPENDIX D: WING LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 1 OF 2)
Original Issue: January 22, 2024
Export Controlled ECCN: 9E991  747-32A2535 RB
See page 1 for details  30 of 33

### Page 31

The step numbers shown below agree with the numbers shown in the circle symbols in the appendix. The QTY
numbers shown below are the number of parts necessary for this appendix.
More DataQtyIdentificationNameTaskStep
(a)(b)--CHROME PLATINGRemove1
(c)1161U1505-( ) OR
65B01430-( ) OR
65B18212-( ) OR
65B19919-( )
OUTER CYLINDER -
WLG
Inspect2
(d)(e)1161U1505-( ) OR
65B01430-( ) OR
65B18212-( ) OR
65B19919-( )
OUTER CYLINDER -
WLG
Repair3
(f)--OUTER CYLINDER -
WLG
Identify4
(a) Remove chrome from the WLG Outer Cylinder working inner diameter for those part numbers and serial
numbers found in APPENDIX A Table A3. Refer to SOPM 20-30-02 as an accepted procedure.
(b) Remove chrome from the WLG Outer Cylinder packing bore inner diameter for those part numbers and
serial numbers found in APPENDIX B Table B1. Refer to SOPM 20-30-02 as an accepted procedure.
(c) Where chrome was removed, do a Nital Etch inspection for any heat damage and a Magnetic Particle
Inspection for any cracks. Refer to SOPM 20-10-02 and SOPM 20-20-01 as accepted procedures.
(d) If any heat damage or any crack is found, repair and apply chrome plate to the WLG Outer Cylinder inner
diameter surfaces in accordance with CMM 32-11-43 or CMM 32-11-44 REPAIR 3-3 or CMM 32-11-46
or CMM 32-11-48 REPAIR 3-3 or CMM 32-11-49 REPAIR 3-3, as applicable.
(e) If no heat damage and no crack is found, apply chrome plate to the WLG Outer Cylinder inner diameter
surfaces. Refer to CMM 32-11-43 or CMM 32-11-44 REPAIR 3-3 or CMM 32-11-46 or CMM 32-11-48
REPAIR 3-3 or CMM 32-11-49 REPAIR 3-3, as applicable, as an accepted procedure.
(f) There is no equivalent Boeing part number for the changed part. Mark on the part that the change in this
bulletin has been done adjacent to and on the same surface as the original manufacturer's permanent
part mark. Refer to SOPM 20-50-10, Electrochemical Etch Code E, Dot Peen Code DP or Vibroengraving
Code VE, as an accepted procedure. If part mark is illegible after application of finishes, refer to SOPM
20-50-10, Rubber Stamping Codes RA, RH, and RY, as an accepted procedure.
APPENDIX D: WING LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
31 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

### Page 32 (OCR)

REQUIREMENTS BULLETIN 747-32A2535
ALERT  ALERT
- PACKING
BORE
INNER
DIAMETER
A-A
BODY LANDING GEAR OUTER CYLINDER  INSPECTION AREA  3046790
(TYPICAL)
APPENDIX E: BODY LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 1 OF 2)
Original Issue: January 22, 2024
Export Controlled ECCN: 9E991  747-32A2535 RB
See page 1 for details  32 of 33

### Page 33

The step numbers shown below agree with the numbers shown in the circle symbols in the appendix. The QTY
numbers shown below are the number of parts necessary for this appendix.
More DataQtyIdentificationNameTaskStep
(a)--CHROME PLATINGRemove1
(b)165B05187-( )OUTER CYLINDER -
BLG
Inspect2
(c)(d)165B05187-( )OUTER CYLINDER -
BLG
Repair3
(e)--OUTER CYLINDER -
BLG
Identify4
(a) Remove chrome from the BLG Outer Cylinder packing bore inner diameter for those part numbers and
serial numbers found in APPENDIX B Table B2. Refer to SOPM 20-30-02 as an accepted procedure.
(b) Where chrome was removed, do a Nital Etch inspection for any heat damage and a Magnetic Particle
Inspection for any cracks. Refer to SOPM 20-10-02 and SOPM 20-20-01 as accepted procedures.
(c) If any heat damage or any crack is found, repair and apply chrome plate to the BLG Outer Cylinder inner
diameter surfaces in accordance with CMM 32-13-40 REPAIR 7-4 or CMM 32-13-44 or CMM 32-13-46,
as applicable.
(d) If no heat damage and no crack is found, apply chrome plate to the BLG Outer Cylinder inner diameter
surfaces. Refer to CMM 32-13-40 REPAIR 7-4 or CMM 32-13-44 or CMM 32-13-46, as applicable, as an
accepted procedure.
(e) There is no equivalent Boeing part number for the changed part. Mark on the part that the change in this
bulletin has been done adjacent to and on the same surface as the original manufacturer's permanent
part mark. Refer to SOPM 20-50-10, Electrochemical Etch Code E, Dot Peen Code DP or Vibroengraving
Code VE, as an accepted procedure. If part mark is illegible after application of finishes, refer to SOPM
20-50-10, Rubber Stamping Codes RA, RH, and RY, as an accepted procedure.
APPENDIX E: BODY LANDING GEAR - OUTER CYLINDER - INSPECTION FOR HEAT DAMAGE AND
CRACKS, AND REPAIR
(SHEET 2 OF 2)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: January 22, 2024
747-32A2535 RB
33 of 33
REQUIREMENTS BULLETIN 747-32A2535
ALERTALERT

---
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