# Boeing Alert Requirements Bulletin 757-53A0129 RB: No revision named

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- Title as filed: 757-53A0129 RB-reduced
- Pages: 42
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## Text

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### Page 1

Commercial 
Airplanes
757
Requirements Bulletin
ALERT
Number: 757-53A0129 RB
Original Issue:
December 08, 2025
ATA System: 5311
SUBJECT: FUSELAGE - Fuselage - Section 43 and Section 46 - Fuselage Frame Lower Lobe
Areas Inspection
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 © 2025 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: December 08, 2025
757-53A0129 RB
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REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT
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### Page 3

Table of Contents
1. EFFECTIVITY .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
A. Airplanes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
B. Spares Affected . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2. CONCURRENT REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3. COMPLIANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4. APPROVAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5. ACCOMPLISHMENT INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
A. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
B. Work Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
FIGURE 1: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI) [Group 1-2] . 13
FIGURE 2: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI) [Group 3] . 18
FIGURE 3: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R
AND S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI) [Group 1-2]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
FIGURE 4: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R
AND S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI) [Group 3]
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
FIGURE 5: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25L AND
S-28L FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI) . . . . . 31
FIGURE 6: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R
AND S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI) [Group
1, 3] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
FIGURE 7: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R
AND S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI) [Group
2] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
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REQUIREMENTS BULLETIN 757-53A0129
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Export Controlled ECCN: 9E991
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Commercial 
Airplanes
757
Requirements Bulletin
ALERT
Number: 757-53A0129 RB
Original Issue:
December 08, 2025
ATA System: 5311
SUBJECT: FUSELAGE - Fuselage - Section 43 and Section 46 - Fuselage Frame Lower Lobe
Areas Inspection
THIS DOCUMENT IS SENT TO THE OPERATORS OF RECORD OF THE AIRPLANES SHOWN IN
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 757-200, 757-200CB, 757-200PF, 757-300 Airplane(s), line number(s)
1-1050 in 3 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
757-200, 757-200CB, and 757-200PF Airplanes with two lower cargo
doors.
- 1
757-200 Airplanes with three lower cargo doors.- 2
All 757-300 Airplanes.- 3
Airplane Models:
757-200, 757-200CB, 757-200PF, 757-300
GroupVariable Number
1NA001 - NA028
GroupVariable Number
1NA191 - NA199
GroupVariable Number
2NA201 - NA236
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### Page 6

GroupVariable Number
1NA237 - NA239
1NA301 - NA305
2NA341 - NA352
2NA391 - NA399
1NA401 - NA408
1NA441 - NA447
1NA501 - NA586
1NB001 - NB004
1NB021 - NB023
1NB036 - NB041
1NB051 - NB053
1NB061 - NB073
1NB079
1NB131 - NB148
1NB161 - NB162
1NB166 - NB168
1NB201 - NB204
1NB221 - NB228
1NB230
1NB236
1NB239
1NB261 - NB267
1NB291 - NB299
1NB301 - NB302
1NB311 - NB312
1NB321 - NB331
1NB421 - NB438
1NB446
1NB451 - NB454
1NB501 - NB523
1NB561
1NB571
1NB581 - NB583
GroupVariable Number
1NC001 - NC033
1NC041 - NC042
1NC051 - NC052
1NC056 - NC062
1NC066 - NC084
1NC091 - NC094
1NC151
1NC161
1NC901 - NC951
1NC971 - NC974
1ND001 - ND007
1ND011 - ND059
1ND111 - ND113
1ND161 - ND199
1ND201 - ND203
1ND221 - ND225
1ND241 - ND248
1ND301 - ND322
1ND401
1ND891
1ND895
1NE001 - NE008
1NE011 - NE088
1NE091 - NE094
1NE141 - NE150
1NE161 - NE177
1NE201 - NE204
1NE301 - NE302
1NE311 - NE325
1NJ001 - NJ004
1NJ031 - NJ032
1NJ551 - NJ555
3NL001 - NL002
GroupVariable Number
3NL006 - NL017
3NL101 - NL109
3NL141
3NL601 - NL616
1NN001 - NN002
1NN051 - NN052
1NP901 - NP904
1NS601 - NS616
1NT001 - NT009
1NT201 - NT202
1NT231 - NT234
1NT237 - NT240
1NT242
1NT245 - NT248
1NT281 - NT289
1NT341 - NT347
1NT351 - NT360
1NT371 - NT373
1NT375 - NT379
1NT381 - NT386
1NT401 - NT409
1NT411 - NT412
1NT426 - NT427
1NT431 - NT432
1NT436 - NT438
1NT441 - NT442
1NT446
1NT701 - NT769
1NT791 - NT796
1NT861 - NT862
1NT881 - NT885
1NT901 - NT916
1NT971 - NT985
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GroupVariable Number
1NU031 - NU038
3NU701 - NU705
GroupVariable Number
3NU721 - NU728
3NU731 - NU732
GroupVariable Number
--
--
B.
Spares Affected
None.
2. CONCURRENT REQUIREMENTS
None.
3. COMPLIANCE
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
Requirements Bulletin 757-53A0129 RB. The Airworthiness Directive will make the compliance tasks and
times given in Requirements Bulletin 757-53A0129 RB mandatory.
Accomplish the required action(s), based on the applicable condition(s) in Table 1 and Table 2, 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: Section 43 - Fuselage Frame Lower Lobe Areas - Inspection
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
ActionCondition
-Within 36 months after
the Original Issue date of
Requirements Bulletin
757-53A0129 RB.
Do a General Visual In-
spection (GVI) of the
fuselage frame lower lobe
areas for any existing re-
inforcing repair.
All Airplanes.
-Before further flight.Contact The Boeing
Company for further in-
structions and do as in-
structed by The Boeing
Company.
CONDITION 1: ANY REIN-
FORCING REPAIR
FOUND.
--No further action is re-
quired.
CONDITION 2: NO REIN-
FORCING REPAIR
FOUND.
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Table 2: Section 46 - Fuselage Frame Lower Lobe Areas - Inspection
Repeat Interval
(Not to Exceed)
Boeing Recommended
Compliance Time
ActionCondition
-Within 36 months after
the Original Issue date of
Requirements Bulletin
757-53A0129 RB.
Do a General Visual In-
spection (GVI) of the
fuselage frame lower lobe
areas for any existing re-
inforcing repair.
All Airplanes.
-Before further flight.Contact The Boeing
Company for further in-
structions and do as in-
structed by The Boeing
Company.
CONDITION 3: ANY REIN-
FORCING REPAIR
FOUND.
--No further action is re-
quired.
CONDITION 4: NO REIN-
FORCING REPAIR
FOUND.
4.
APPROVAL
This Requirements Bulletin was examined by the Federal Aviation Administration (FAA). This Requirements
Bulletin contains no information that changes the approved configuration of the airplane. The actions
specified in this Requirements Bulletin are FAA approved, as well as European Union Aviation Safety
Agency (EASA) approved for all EASA 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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### Page 9

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. Boeing Service Letter 757-SL-51-022, 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.
5. 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 757 Structural Repair Manual,
Chapter 51.
— Values for airframe maintenance tasks are included in Chapter 20 of 757
Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of
Standard Wiring Practices Manual (SWPM).
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### Page 10

— Non-standard torque values for maintenance tasks are included in the
applicable installation step.
6.
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.
7. 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.
8. 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.
9. Use the approved fastener, process and material substitutions in accordance with
SRM Chapter 51.
10. A General Visual Inspection (GVI) is defined as: A visual examination of an interior
or exterior area, installation or assembly to detect obvious damage, failure or
irregularity. This level of inspection is made from within touching distance, unless
otherwise specified. A mirror may be necessary to enhance visual access to all
exposed surfaces in the inspection area. This level of inspection is made under
normally available lighting conditions such as daylight, hangar lighting, flashlight or
drop-light and may require removal or opening of access panels or doors. Stands,
ladders or platforms may be required to gain proximity to the area being checked.
Basic cleaning may be required to ensure appropriate visibility.
11. 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.
12. 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.
13. 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. Refer to SOPM 20-50-01 for ADJUSTMENT OF
GRIP LENGTH and USE OF WASHERS as an accepted procedure.
14. Use of colors in Figures is based on guidance from the ATA e-Business Program
(ATA) iSpec 2200.
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REQUIREMENTS BULLETIN 757-53A0129
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### Page 11

B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements
Group 1-2:
Table 1: Section 43 - Fuselage Frame Lower Lobe Areas - Inspection
Refer to the listed proce-
dures in SB 757-53A0129
Original Issue or later
approved revisions as an
accepted procedure.
Method of ComplianceActionCondition
Do PART 1: SECTION 43
OPEN ACCESS.
-Do a General Visual In-
spection (GVI) of the fuse-
lage frame lower lobe ar-
eas for any existing rein-
forcing repair.
All Airplanes.
-FIGURE 1 and FIGURE 3
--Contact The Boeing Com-
pany for further instruc-
tions and do as instructed
by The Boeing Company.
CONDITION 1: ANY REIN-
FORCING REPAIR
FOUND. Do PART 2: SECTION 43CLOSE ACCESS.-
Do PART 2: SECTION 43
CLOSE ACCESS.
-No further action is re-
quired.
CONDITION 2: NO REIN-
FORCING REPAIR
FOUND.
Group 3:
Table 2: Section 43 - Fuselage Frame Lower Lobe Areas - Inspection
Refer to the listed proce-
dures in SB 757-53A0129
Original Issue or later
approved revisions as an
accepted procedure.
Method of ComplianceActionCondition
Do PART 1: SECTION 43
OPEN ACCESS.
-Do a General Visual In-
spection (GVI) of the fuse-
lage frame lower lobe ar-
eas for any existing rein-
forcing repair.
All Airplanes.
-FIGURE 2 and FIGURE 4
--Contact The Boeing Com-
pany for further instruc-
tions and do as instructed
by The Boeing Company.
CONDITION 1: ANY REIN-
FORCING REPAIR
FOUND. Do PART 2: SECTION 43CLOSE ACCESS.-
Do PART 2: SECTION 43
CLOSE ACCESS.
-No further action is re-
quired.
CONDITION 2: NO REIN-
FORCING REPAIR
FOUND.
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### Page 12

Group 1, 3:
Table 3: Section 46 - Fuselage Frame Lower Lobe Areas - Inspection
Refer to the listed proce-
dures in SB 757-53A0129
Original Issue or later
approved revisions as an
accepted procedure.
Method of ComplianceActionCondition
Do PART 3: SECTION 46
OPEN ACCESS.
-Do a General Visual In-
spection (GVI) of the fuse-
lage frame lower lobe ar-
eas for any existing rein-
forcing repair.
All Airplanes.
-FIGURE 5 and FIGURE 6
--Contact The Boeing Com-
pany for further instruc-
tions and do as instructed
by The Boeing Company.
CONDITION 3: ANY REIN-
FORCING REPAIR
FOUND. Do PART 4: SECTION 46CLOSE ACCESS.-
Do PART 4: SECTION 46
CLOSE ACCESS.
-No further action is re-
quired.
CONDITION 4: NO REIN-
FORCING REPAIR
FOUND.
Group 2:
Table 4: Section 46 - Fuselage Frame Lower Lobe Areas - Inspection
Refer to the listed proce-
dures in SB 757-53A0129
Original Issue or later
approved revisions as an
accepted procedure.
Method of ComplianceActionCondition
Do PART 3: SECTION 46
OPEN ACCESS.
-Do a General Visual In-
spection (GVI) of the fuse-
lage frame lower lobe ar-
eas for any existing rein-
forcing repair.
All Airplanes.
-FIGURE 5 and FIGURE 7
--Contact The Boeing Com-
pany for further instruc-
tions and do as instructed
by The Boeing Company.
CONDITION 3: ANY REIN-
FORCING REPAIR
FOUND. Do PART 4: SECTION 46CLOSE ACCESS.-
Do PART 4: SECTION 46
CLOSE ACCESS.
-No further action is re-
quired.
CONDITION 4: NO REIN-
FORCING REPAIR
FOUND.
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REQUIREMENTS BULLETIN 757-53A0129
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### Page 13 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
This Figure applies only to: Group 1-2.
C
• S-19L
/ S-20L
• S-21L
S-22L
• S-23L
• S-24L
/ S-25L
STA
440
STA
STA 460
STA 480
STA 500
STA
STA 580
STA  600
STA 620
640
STA
660
3099169
FIGURE 1: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 5)
Original Issue: December 08, 2025
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See page 1 for details  13 of 42

### Page 14 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-19L
S-20L
S-21L
S-22L -  STA  780
S-23L-
S-241  STA
820
S-25L
STA
840
3099176
FIGURE 1: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 5)
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### Page 15 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-20L /
S-21L
S-221
S-23L
S-24L
S-25L
INBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099214
FIGURE 1: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 5)
Original Issue: December 08, 2025
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### Page 16 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-20L /
S-211
S-22L
S-23L
S-24L
INBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)  S-25L
GENERAL VISUAL INSPECTION (GVI) AREA  3099215
FIGURE 1: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 5)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  16 of 42

### Page 17

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) 20-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 1: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
17 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

### Page 18 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
This Figure applies only to: Group 3.
- S-19L
S-20L
• S-21L
• S-22L
- S-23L
S-24L
S-25L
STA
STA 440
STA 460
STA 480
STA 500
STA  520
540
STA
STA 580
STA  600
620
STA
640
STA
660
3099218
FIGURE 2: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 5)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  18 of 42

### Page 19 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
680
S-19L /
S-20L /
S-21L
S-221 -
S-23L
S-241-  STA
S-25L  780
STA  +40
780  +60  S-19L
- S-20L
S-21L
• S-22L
• S-23L
S-24L
S-25L
STA
780
STA  +80
780
STA  +100
780
STA  +120
780
STA  +140
780
STA  800  +160  1366608
STA
820
FIGURE 2: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 5)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  19 of 42

### Page 20 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-20L /
S-21L
S-22L
S-23L
S-24L
S-25L
INBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099313
FIGURE 2: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 5)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  20 of 42

### Page 21 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-20L /
S-21L
8-221
S-23L
S-24L
INBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)  S-25L
GENERAL VISUAL INSPECTION (GVI) AREA  3099655
FIGURE 2: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 5)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  21 of 42

### 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) 28-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 2: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20L AND
S-25L FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 5 OF 5)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
22 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

### Page 23 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
This Figure applies only to: Group 1-2.
460
STA
540 STA
560 STA
580 STA
600
STA
620 STA
640  STA
660
S-20R  *S-19R
S-21R
*S-22R
-S-23R
S-24R
S-25R
FIGURE 3: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  23 of 42

### Page 24 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
680
STA
700
STA
720
STA
740
STA
760
ST
* S-19R
S-20R
• S-21R
• S-22R
S-23R
S-24R
S-25R
3099336
FIGURE 3: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  24 of 42

### Page 25 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-20R
S-21R
S-22R
S-23R
S-24R
S-25R
NBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099547
FIGURE 3: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  25 of 42

### Page 26

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) 16-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 3: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
26 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

### Page 27 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
This Figure applies only to: Group 3.
STA
440 STA
460
STA
540 STA
560 STA
580 STA
600
VIS
640  STA
660
S-20R  *S-19R
S-21R
*S-22R
-S-23R
S-24R
S-25R
3099340
FIGURE 4: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  27 of 42

### Page 28 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
680 STA
700 STA
720 STA
740 STA
760 STA STA  780  780 STA  +20  780
+40  STA
780
+60
S-19R
S-20R
* S-21R
S-22R
S-23R
S-24R
*S-25R
08+
084 00k+  OZI+  7100 370  STA
+160 STA
800 STA
820 STA
840
S-19R
S-20R
S-21R
* S-22R
S-23R
S-24R
* S-25R
3099344
FIGURE 4: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  28 of 42

### Page 29 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
→ S-20R
S-21R
s-22R
S-23R
S-24R
S-25R
NBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099548
FIGURE 4: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  29 of 42

### Page 30

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) 24-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 4: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-20R AND
S-24R FROM STA 440 TO STA 820 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
30 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

### Page 31 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
1280
STA
1300
STA
1320
STA
1340
S25L
_S26L
S27L
_S28L
3099353
FIGURE 5: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25L AND
S-28L FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  31 of 42

### Page 32 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
1480
STA
1500
STA
1520
STA
1540
STA
1560
STA
1580
STA
STA  1600  —825L
1640  STA  1620  S26L  . S27L
STA  - S28L
1661
STA
1681.8
S25L
S26L
S27L
S28L
3099430
FIGURE 5: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25L AND
S-28L FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  32 of 42

### Page 33 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-25L
S-26L
INBD
S-27L
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
S-25L
S-27L
INBD  S-28L
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099544
FIGURE 5: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25L AND
S-28L FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  33 of 42

### Page 34

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) 19-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 5: LEFT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25L AND
S-28L FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
34 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

### Page 35 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
This Figure applies only to: Group 1, 3.
STA
1280
STA
1300
S25R  1360 STA  STA  TO GO GO SAO GO
S26R
S28R_  S27R
3099438
FIGURE 6: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  35 of 42

### Page 36 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
1480
STA
1500
STA
1520
STA
1540
STA
1560
STA
1580
STA
1600
STA
1640
STA
1661
STA
1681.8
S25R
S26R
S27R
S28R
3099439
FIGURE 6: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  36 of 42

### Page 37 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-25R
S-26R
S-27R
INBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099539
FIGURE 6: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  37 of 42

### Page 38

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) 15-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 6: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
38 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

### Page 39 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
This Figure applies only to: Group 2.
STA
1280
STA
1300
STA
1320
STA
1340
STA
1360
STA
1380
STA
1400
STA
1420
S25R.  STA
S26R  1440
STA
S27R .  1460
S28R_
FIGURE 7: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 1 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  39 of 42

### Page 40 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
STA
1480
STA
1500
STA
1540
STA
1560
STA
1580
STA
1600
S25R  STA
S26R.  1620
S27R  1640  STA
S28R
STA
1661
STA
1681.8
S25R
S26R
S27R
S28R
3099535
FIGURE 7: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 2 OF 4)
Original Issue: December 08, 2025
757-53A0129 RB
Export Controlled ECCN: 9E991
See page 1 for details  40 of 42

### Page 41 (OCR)

REQUIREMENTS BULLETIN 757-53A0129
ALERT  ALERT
S-25R
S-26R
S-27R
INBD
VIEW IN THE FORWARD DIRECTION
(TYPICAL)
GENERAL VISUAL INSPECTION (GVI) AREA  3099537
FIGURE 7: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 3 OF 4)
Original Issue: December 08, 2025
Export Controlled ECCN: 9E991  757-53A0129 RB
See page 1 for details  41 of 42

### Page 42

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) 11-FUSELAGE FRAMEInspect1
(a) Do a General Visual Inspection (GVI) of the forward and aft sides of the fuselage frame lower lobe areas
for any reinforcing repair.
FIGURE 7: RIGHT SIDE - FUSELAGE FRAME LOWER LOBE AREAS BETWEEN STRINGERS S-25R AND
S-27R FROM STA 1300 TO STA 1661 - GENERAL VISUAL INSPECTION (GVI)
(SHEET 4 OF 4)
Export Controlled ECCN: 9E991
See page 1 for details
Original Issue: December 08, 2025
757-53A0129 RB
42 of 42
REQUIREMENTS BULLETIN 757-53A0129
ALERTALERT

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