# Boeing Alert Requirements Bulletin 767-53A0337 RB: No revision named, part 1 of 2

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- Document: [Boeing Alert Requirements Bulletin 767-53A0337 RB](https://openairdocs.org/service-documents/boeing/767-53a0337-rb.md)
- Title as filed: 767-53A0337 RB - part 1
- Pages: 32
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## Text

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### Page 1 (OCR)

Commercial
BOEING  Airplanes  767
Requirements Bulletin
- ALERT
Number:  767-53A0337 RB
Original Issue: October 17, 2025
ATA System:  5301 2557
SUBJECT:  FUSELAGE - Floor - Cargo Track Crown Fittings 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.
ECCN: 9E991
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: October 17, 2025
767-53A0337 RB
1 of 65
3.0

### Page 2 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
BLANK PAGE
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  67-53A0337 RE
See page 1 for details  • ot 65

### Page 3 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Table of Contents
1.  EFFECTIVITY  5
A. Airplanes  5
B. Spares Affected  5
2.  CONCURRENT REQUIREMENTS .  6
COMPLIANCE  6
4.  APPROVAL  8
5. ACCOMPLISHMENT INSTRUCTIONS  9
A. General Information .  9
B. Work Instructions  10
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT  13
FIGURE 2:  FUSELAGE - SECTION 43 - CARGO TRACK CROWN FITTINGS INSPECTION  24
FIGURE 4:  FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
26
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT . 37
FIGURE 6:  FUSELAGE - SECTION 46 - CARGO TRACK CROWN FITTINGS INSPECTION .  47
FIGURE 8: I FUSELAGE - SECTION 46 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
49
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION .  60
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
BLANK PAGE
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  4 of 65

### Page 5 (OCR)

Commercial
A BOEING  Airplanes  767
Requirements Bulletin
• ALERT
Number:  767-53A0337 RB
Original Issue: October 17, 2025
ATA System:  5301 2557
SUBJECT:  FUSELAGE - Floor - Cargo Track Crown Fittings Inspection and Replacement
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 767-300F Airplane(s), line number(s) 1206, 1208-1209, 1211-1212,
1214-1215, 1217-1218, 1220-1222, 1224-1225, 1227-1229, 1231-1233, 1235, 1237, 1239-1240,
1242, 1244-1245, 1247, 1249, 1251, 1253, 1255-1256, 1258, 1260, 1262-1263, 1265-1266, 1268,
1270, 1272, 1274, 1276, 1278-1279 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.
GROUP  CONFIGURATION  DESCRIPTION
1  767-300F Airplanes.
Airplane Models:
767-300F
Variable Number  Group  Variable Number  Group  Variable Number  Group
VR299 - VR305  VT638 - VT671  1  VT731 - VT735  1
B. Spares Affected
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Examine spares supply for the parts or components identified below. If any parts or components
are found, refer to Work Instructions for the recommended action.
Part Number  Name
146T5223-4  FITTING-TRACK CROWN
146T5223-5  FITTING-TRACK CROWN
146T5223-6  FITTING-TRACK CROWN
2. CONCURRENT REQUIREMENTS
None.
3. COMPLIANCE
The Federal Aviation Administration (FAA) will possibly release an Airworthiness Directive related to
Requirements Bulletin 767-53A0337 RB. The Airworthiness Directive will make the compliance tasks and
times given in Requirements Bulletin 767-53A0337 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: Fuselage - Section 43 - Cargo Track Crown Fitting Inspection and Replacement
Condition  Action  Boeing Recommended  Repeat Interval (Not to
Compliance Time  Exceed)
All Airplanes  OPTION 1: Replace all  Within 24 months after the
Cargo Track Crown Fit-  Original Issue date of Re-
tings with new Cargo Track  quirements Bulletin 767-
Crown Fittings (Ti-6Al-4V  53A0337 RB.
alloy material).
OPTION 2: Do an X-Ray  Within 24 months after the -
Fluorescence (XRF) in-  Original Issue date of Re-
spection to identify the  quirements Bulletin 767-
material composition of the  53A0337 RB.
Cargo Track Crown Fit-
tings.
CONDITION 1: ANY CAR-  No further action required. -
GO TRACK CROWN FIT-
TING FOUND THAT HAS
A MATERIAL COMPOSI-
TION CONSISTENT WITH
Ti-6AI-4V.
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Table 1: Fuselage - Section 43 - Cargo Track Crown Fitting Inspection and Replacement
Condition  Action  Boeing Recommended  Repeat Interval (Not to
Compliance Time  Exceed)
CONDITION 2: ANY CAR-  Replace the affected Car-  Before further flight.
GO TRACK CROWN FIT- go Track Crown Fitting
TING FOUND THAT  with a new Cargo Track
DOES NOT HAVE A MA- Crown Fitting (Ti-6A1-4V
TERIAL COMPOSITION  alloy material).
CONSISTENT WITH Ti-
6AI-4V OR MATERIAL
CANNOT BE DETER-
MINED.
Table 2: Fuselage - Section 46 - Cargo Track Crown Fitting Inspection and Replacement
Condition  Action  Boeing Recommended  Repeat Interval (Not to
Compliance Time  Exceed)
All Airplanes  OPTION 1: Replace all  Within 24 months after the
Cargo Track Crown Fit-  Original Issue date of Re-
tings with new Cargo Track  quirements Bulletin 767-
Crown Fittings (Ti-6Al-4V  53A0337 RB.
alloy material).
OPTION 2: Do an X-Ray  Within 24 months after the
Fluorescence (XRF) in-  Original Issue date of Re-
spection to identity the  quirements Bulletin 767-
material composition of the  53A0337 RB.
Cargo Track Crown Fit-
tings.
CONDITION 3: ANY CAR- No further action required. -
GO TRACK CROWN FIT-
TING FOUND THAT HAS
A MATERIAL COMPOSI-
TION CONSISTENT WITH
Ti-6AI-4V.
CONDITION 4: ANY CAR- Replace the affected Car-  Before further flight.
GO TRACK CROWN FIT- go Track Crown Fitting
TING FOUND THAT  with a new Cargo Track
DOES NOT HAVE A MA- Crown Fitting (Ti-6Al-4V
TERIAL COMPOSITION  alloy material).
CONSISTENT WITH Ti-
6AI-4V OR MATERIAL
CANNOT BE DETER-
MINED.
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  See page 1 for details  767-53A0337 RB  7 of 65

### Page 8 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
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) 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.
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  8 of 65

### Page 9 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
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
locations are marked RC Start and RC End to identify the requirements that are  are not required by the AD and are for guidance only. For the related SB, some  ested on the fa. for he ate c
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 767 Structural Repair Manual,
Chapter 51.
- Values for airframe maintenance tasks are included in Chapter 20 of 767
Aircraft Maintenance Manual (AMM).
— Values for electrical maintenance tasks are included in Chapter 20 of
Standard Wiring Practices Manual (SWPM).
- Non-standard torque values for maintenance tasks are included in the
applicable installation step.
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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### Page 10 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
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.
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. Refer to SOPM 20-50-01 for ADJUSTMENT OF
GRIP LENGTH and USE OF WASHERS as an accepted procedure.
12.  Some Boeing parts are supplied in a temporary configuration. Those parts are
identified with a 'U, 'W', or 'Y' in place of the '"' (dash) in the part number. It is
permitted to install parts identified with a 'U', 'W', or 'Y' as an alternative to the ''
(dash) part number. Boeing Drawing 005W0900 contains more data.
13.  Use of colors in Figures is based on guidance from the ATA e-Business Program
(ATA) iSpec 2200.
B. WORK INSTRUCTIONS
Actions Required for Compliance
1. Requirements
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 11 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Table 1: Fuselage - Section 43 - Cargo Track Crown Fittings Inspection and Replacement
Condition  Action  Method of Compliance  Refer to the listed proce-
dures in SB 767-53A0337
Original Issue or later
approved revisions as an
accepted procedure.
All Airplanes  OPTION 1: Replace all  Do PART 1: OPEN AC-
Cargo Track Crown Fit-  CESS
tings with new Cargo Track  Do PART 3: CARGO
Crown Fittings (Ti-6Al-4V  TRACK CROWN FITTING
alloy material).  ACCESS
FIGURE 1
Do PART 4: CLOSE AC-
CESS
OPTION 2: Do an X-Ray  Do PART 1: OPEN AC-
Fluorescence (XRF) in-  CESS
spection to identity the  FIGURE 2
material composition of the
Cargo Track Crown Fit-
tings.
CONDITION 1: ANY CAR-  No further action required. -  Do PART 2: APPLY CAR-
GO TRACK CROWN FIT-  GO TRACK CROWN FIT-
TING FOUND THAT HAS  TING FINISH
A MATERIAL COMPOSI-
Do PART 4: CLOSE AC-
TION CONSISTENT WITH
CESS
Ti-6AI-4V.
CONDITION 2: ANY CAR-  Replace the affected Car-  Do PART 3: CARGO
GO TRACK CROWN FIT- go Track Crown Fitting  TRACK CROWN FITTING
TING FOUND THAT  with a new Cargo Track  ACCESS
DOES NOT HAVE A MA-  Crown Fitting (Ti-6Al-4V
FIGURE 4
TERIAL COMPOSITION  alloy material).
CONSISTENT WITH Ti-  Do PART 4: CLOSE AC-
6AI-4V OR MATERIAL  CESS
CANNOT BE DETER-
MINED.
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Table 2: Fuselage - Section 46 - Cargo Track Crown Fittings Inspection and Replacement
Condition  Action  Method of Compliance  Refer to the listed proce-
dures in SB 767-53A0337
Original Issue or later
approved revisions as an
accepted procedure.
All Airplanes  OPTION 1: Replace all  Do PART 1: OPEN AC-
Cargo Track Crown Fit-  CESS
tings with new Cargo Track  Do PART 3: CARGO
Crown Fittings (Ti-6Al-4V  TRACK CROWN FITTING
alloy material).  ACCESS
FIGURE 5
Do PART 4: CLOSE AC-
CESS
OPTION 2: Do an X-Ray  Do PART 1: OPEN AC-
Fluorescence (XRF) in-  CESS
spection to identify the  FIGURE 6
material composition of the
Cargo Track Crown Fit-
tings.
CONDITION 3: ANY CAR- No further action required -  Do PART 2: APPLY CAR-
GO TRACK CROWN FIT-  GO TRACK CROWN FIT-
TING FOUND THAT HAS  TING FINISH
A MATERIAL COMPOSI-
Do PART 4: CLOSE AC-
TION CONSISTENT WITH
CESS
Ti-6AI-4V.
CONDITION 4:ANY CAR-  Replace the affected Car-  Do PART 3: CARGO
GO TRACK CROWN FIT- go Track Crown Fitting  TRACK CROWN FITTING
TING FOUND THAT  with a new Cargo Track  ACCESS
DOES NOT HAVE A MA-  Crown Fitting (Ti-6Al-4V  FIGURE 8
TERIAL COMPOSITION  alloy material).
CONSISTENT WITH Ti-  Do PART 4: CLOSE AC-
6AI-4V OR MATERIAL  CESS
CANNOT BE DETER-
MINED.
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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### Page 13 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
4OC
SIA  STA
434  456
-54.75
— 33.00
- 17.00
FWD
MAIN DECK FLOOR STRUCTUR
VIEW IN THE DOWN DIRECTION
(TYPICAL)  A-A  3095850
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 1 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 14 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA
654  654+22
ERBL  54.75
33.00
=— RBL  11.00
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)
B-B
3095849
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 2 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 15 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
12) 26 LOCATIONS
STA
423
ệ chan con gian cho chan
RBL
33.0 ~
2jat2 9 22 22 92 82 812
FWD
12) 24 LOCATIONS
CHON  CHAN ChA  CHON CiON CHON
RBL
33.0
A 12
1) 2
3095848
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 3 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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### Page 16 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
2) 26 LOCATIONS
CHON  hon cho chan gone a
CHON  0e 90 00 0 9 02
RBL
33.0
FWD
STA
489  3 4 28 LOCATIONS
RBL
33.0
3095847
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 4 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 17 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
SIA
522
3 4 22 LOCATIONS
C 10N  ро ста істо сом сро сро сра сром
_C 117
RBL
33.0
+++++++
FWD
544
4) 26 LOCATIONS
8718121017
RBL
33.0
FWD
3095898
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 5 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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### Page 18 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
28 LOCATIONS
RBL
33.0
26 LOCATIONS
599
CION CON CON CHON/CHON
RBL
33.0
3095911
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 6 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 19 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT
SIA
610
VIS
669
(7) 8)
RBL
33.0
FWD
STA
632
26 LOCATIONS
7) ₴
RBL
33.0
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 7 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 20 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
26 LOCATIONS  STA
654+11
TON  C 10N
cl17  C117
FWD
RBL
33.0
6847-22
30 LOCATIONS
STA
654+11  \10)  54+3
RBL
33.0
3095930
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 8 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
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### Page 21 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
Step  Task  Name  Identification  Qty  More Data
1  Remove  FASTENER  76
Remove  FITTING, TRACK  146T5223-6  1
CROWN
2  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y30  1
CROWN
Install (New)  FASTENER  76  (b)
Remove  FASTENER  76
Remove  FITTING, TRACK  146T5223-6  1
CROWN
4  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y30  1
CROWN
Install (New)  FASTENER  76  (b)
5  Remove  FASTENER  54
Remove  FITTING, TRACK  146T5223-5  1
CROWN
6  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y29  1
CROWN
Install (New)  FASTENER  54  (0)
Remove  FASTENER  76
Remove  FITTING, TRACK  146T5223-6  1
SROWI
Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y30  1
CROWN
Install (New)  FASTENER  76  (b)
9  Remove  FASTENER  30
Remove  FITTING, TRACK  146T5223-4  1
CROWN
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 9 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
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### Page 22 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
10  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y28
CROWN
Install (New)  FASTENER  30  (b)
(a) Apply fay surface seal between mating surfaces of the Cargo Track Crown Fitting and aluminum floor
panel attachment plate. Refer to SOPM 20-50-19 as an accepted procedure.
(b) Refer to fastener code table for fastener installation.
FASTENER
DIAMETER
(OPTIONAL)
LETTER CODE
HEAD LOCATION
→D  • N = NEAR SIDE
6F  F = FAR SIDE
(OPTIONAL)
7
COUNTERSINK  FASTENER
LENGTH/GRIP
(OPTIONAL)
EXAMPLE OF FASTENER SYMBOL
The codes shown below agree with the letter shown in the upper left corner of the fastener symbols in the figure.
A number in the lower right corner gives the grip length of the fastener. The QTY numbers shown below are the
number of fasteners necessary for this figure.
Code  Name  Identification  Qty  Hole Dia  More Data
BOLT, 100 DEG HEX  BACB30NY10K12  24  0.3120 -  (a) (b) (c)(d) (h)
DR  0.3160
COLLAR  BACC30BH10  24
BOLT, 100 DEG HEX  BACB30NY10K14  16  0.3120 -  (a)(b)(c) (a)
DR  0.3160
COLLAR  BACC30BH10  16
BOLT, 100 DEG HEX  BACB30NY10K17  198  0.3120 -  (a)(b) (c)(d) (e)(f) (g) (h)
DR  0.3160
COLLAR  BACC30BH10  198
BOLT, 100 DEG HEX  BACB30NY10K20  74  0.3120 -  (a) (b)(c)(d)
DR  0.3160
COLLAR  BACC30BH10  74
(a)  Match drill holes using the removed Cargo Track Crown Fitting in new Cargo Track Crown Fitting. Refer
to SOPM 20-10-07 as an accepted procedure.
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 10 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  22 of 65

### Page 23 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Code  Name  Identification  Qty  Hole Dia  More Data
(b) Countersink fastener holes 100 degrees on the near side of the Cargo Track Crown Fitting.
(c) Break all sharp edges. Refer to SOPM 20-10-07 as an accepted procedure.
(d) Install fasteners wet with BMS5-95 sealant. Refer to SOPM 20-50-19, Method 2, as an accepted procedure.
(e) Use Quantity (1) Washer, installed under the collar if installing a BACB30NY 10K18 Bolt.
(f) Use Quantity (2) Washers, installed under the collar if installing a BACB30NY 10K19 Bolt.
(g) Substitution Kit 015T2055-2 and 015T2055-3 contain alternate parts.
(h) Do not exceed grip length of 19.
The parts shown in the table below are provided as extra parts for this figure.
Name  Identification  Qty  More Data
BOLT, 100 DEG HEX DR  BACB30NY10K12  4
BOLT, 100 DEG HEX DR  BACB30NY10K17  8
FIGURE 1: FUSELAGE - SECTION 43 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 11 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  23 of 65

### Page 24 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA STA  STA  STA  STA  STA  STA
434  478  544  588  632  654 654+22
— RBL
54.75
— RBL
33.00
ERBL
11.00
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)
A-A
WL
199.5
RBL
33.0
(A PORTION OF THE CROWN TRACK FITTING SHOWN)
(TYPICAL)
3095703
FIGURE 2: FUSELAGE - SECTION 43 - CARGO TRACK CROWN FITTINGS INSPECTION
(SHEET 1 OF 2)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  24 of 65

### Page 25 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
The step numbers shown below agree with the numbers shown in the circle symbols in the figure. The QTY
numbers shown below are the number of parts necessary for this figure.
Step  Task  Name  Identification  Qty  More Data
1  Inspect  FITTING, TRACK  146T5223-4  1  (a)
CROWN
Inspect  FITTING, TRACK  146T5223-5  1  (a)
CROWN
Inspect  FITTING, TRACK  146T5223-6  (a)
CROWN
(a)  Do an X-Ray Fluorescence (XRF) inspection of the Cargo Track Crown Fittings to determine the material
in accordance with APPENDIX A.
FIGURE 2: FUSELAGE - SECTION 43 - CARGO TRACK CROWN FITTINGS INSPECTION
(SHEET 2 OF 2)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  25 of 65

### Page 26 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  SIA
632
-54.75
- 33,00
_ RBL
11.00
FWD
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)  A-A  3103430
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 1 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  26 of 65

### Page 27 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA
654  654+22
‚RBL
54.75
~ RBL
33.00
— RBL
11.00
FWD
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)
B-B
3103431
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 2 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  27 of 65

### Page 28 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
12 26 LOCATIONS
RBL
33.0 -
8/a 2/2 2a 212 CO  İâ12
FWD
12 24 LOCATIONS
ON CAN chON ChONGHON CHO
RBL
33.0
- 10N
7
3103432
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 3 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  28 of 65

### Page 29 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
(2) 26 LOCATIONS  489
A HON
2 02 912  0 0 0 00 920920
RBL
33.0
FWD
STA
500
STA
489  3 4) 28 LOCATIONS
CITY CON CON CON CON CON CiON
C 20
RBL
33.0
3103433
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 4 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991  See page 1 for details  29 of 65

### Page 30 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
522
(4) 22 LOCATIONS
C 10N  chan  Chan Chan  CHION
RBL  Cl17  © 174 YG 7)
33.0
0117017
+ +
FWD
3 4 26 LOCATIONS
CHON  CHaN  CHON  ChON
CHIN
RBL
33.0
-WD
3103434
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 5 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  30 of 65

### Page 31 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
28 LOCATIONS  566
STA
555
RBL
33.0
FWD
G
STA
26 LOCATIONS  588  SIA
599
RBL
33.0
-WD
3103435
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 6 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  31 of 65

### Page 32 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
SIA
610
STA  24 LOCATIONS
599
• 10N
RBL
33.0
FWD
STA
632
26 LOCATIONS
RBL
33.0
3103445
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 7 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  32 of 65

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