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

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2026-1329; AD 2026-18-08 incorporates this document by reference. Not covered by OpenAirDocs’ CC0 dedication.
- 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 2
- Pages: 33
- PDF: https://openairdocs.org/files/sha256/90/f7/90f757672b768878e7658311477baea2973349a3ad856b270e9b5c666f4f4316
- Page: https://openairdocs.org/service-documents/boeing/767-53a0337-rb/file/90f757672b76

## Text

This text is OCR from a scan. OCR can misread letters and numbers. Each page's text from the PDF; open the PDF at a page with #page=N.

### Page 1 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
654
26 LOCATIONS  STA
654+1
CION CiON
choN
FWD
RBL
33.0
K
STA
654+22
30 LOCATIONS
STA  SIA
654+11  654+3
Se da da da ta ta see
RBL  FWD
33.0
3103436
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 8 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  33 of 65

### Page 2 (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  (a)
Remove  FITTING, TRACK  146T5223-6  1  (a)
CROWN
2  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y30  1  (a)
CROWN
Install (New)  FASTENER  76  (a) (c)
Remove  FASTENER  76  (a)
Remove  FITTING, TRACK  146T5223-6  1  (a)
CROWN
4  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y30  1  (a)
CROWN
Install (New)  FASTENER  76  (a) (c)
5  Remove  FASTENER  54  (a)
Remove  FITTING, TRACK  146T5223-5  1  (a)
CROWN
6  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y29  1  (a)
CROWN
Install (New)  FASTENER  54  (a) (c)
7  Remove  FASTENER  76  (a)
Remove  FITTING, TRACK  146T5223-6  1  (a)
CROWN
Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y30  1  (a)
CROWN
Install (New)  FASTENER  76  (a)(c)
9  Remove  FASTENER  30  (a)
Remove  FITTING, TRACK  146T5223-4  1  (a)
CROWN
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 9 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  34 of 65

### Page 3 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
10  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y28  1  (a)
CROWN
Install (New)  FASTENER  30  (a) (c)
(a) At all locations where the Cargo Track Crown Fitting is found to not have a material composition consistent
with Ti-6AI-4V material, or alloy material could not be determined.
(10)  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.
(C)  Refer to fastener code table for fastener installation.
FASTENER
DIAMETER
(OPTIONAL)
LETTER CODE
HEAD LOCATION
D  6F  * N = NEAR SIDE  F = FAR SIDE
(OPTIONAL)
C
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
A  BOLT, 100 DEG HEX  BACB30NY10K12  24  0.3120 -  (a) (b)(c)(d)
DR  0.3160
COLLAR  BACC30BH10  24
B  BOLT, 100 DEG HEX  BACB30NY10K14  16  0.3120 -  (a) (b) (c) (d)
DR  0.3160
COLLAR  BACC30BH10  16
C  BOLT, 100 DEG HEX  BACB30NY10K17 OR  198  0.3120 -  (a) (o) (c)(a) (g)
DR  BACB30NY10K18 OR  0.3160
BACB30NY10K19
WASHER  BACW10BP5AP  198  (e)
WASHER  BACW10BP5AP  396  (T)
COLLAR  BACC30BH10  198
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED 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  35 of 65

### Page 4 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Code  Name  Identification  Qty  Hole Dia  More Data
D  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.
(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 BACB3ONY10K18 Bolt.
(T)  Use Quantity (2) Washers, installed under the collar if installing a BACB30NY10K19 Bolt.
(g) Do not exceed grip length of 19.
FIGURE 4: FUSELAGE - SECTION 43 - AFFECTED 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  36 of 65

### Page 5 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA  STA
1197  1197  1197  STA  SIP  SIA  STA  STA  STA  STA
+88  +110  +132  1219  124  1263  1285  1307  1329  1341
RBL
54.75 -
33.00 -  RBL
RBL
11.00 -
B  F
FWD
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)  A-A  3096124
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 1 OF 10)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  37 of 65

### Page 6 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA
1373 1395
RBL
54.75
RBL
33.00
RBL
11.00
FWD
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)
B-B
3096125
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 2 OF 10)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  38 of 65

### Page 7 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
1197+88
24 LOCATIONS
STA
1197+77
RBL
33.0
STA
1197+110
30 LOCATIONS  STA
1197
+121
110Г
RBL
33.0
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 3 OF 10)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  39 of 65

### Page 8 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
1197+132
STA  28 LOCATIONS
1197
+121
chance chan chan chan donate a alan apan phoebo
RBL
33.0
SIA
1219
26 LOCATIONS
STA
1230
RBL
33.0
D 10N  D 10N  D 10N
C 120  C 20
3096127
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 4 OF 10)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  40 of 65

### Page 9 (OCR)

PYETE
LTZL
VIS  90
OEZI
8Z1
96Z1
O'ES
satan to taned tas  99 10 17

### Page 10 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  22 LOCATIONS
1296
RBL
33.0
G
STA
1329
28 LOCATIONS
CHOn
FWD
RBL
33.0
3096129
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 6 OF 10)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  42 of 65

### Page 11 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
26 LOCATIONS
STA
1362
C 10N
RBL
33.0
1373
26 LOCATIONS
1362  STA  10
KBL
33.0
3096130
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 7 OF 10)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  43 of 65

### Page 12 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
SIA
1395
28 LOCATIONS
CHON  CHON CON CONCHNA/ON  1Ô 12N CHON
CHON
RBL
33.0  FWD
3096131
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  54
Remove  FITTING, TRACK  146T5223-5  1
CROWN
2  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y29  1
CROWN
Install (New)  FASTENER  54  (b)
З  Remove  FASTENER  54
Remove  FITTING, TRACK  146T5223-5  1
CROWN
4  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y29  1
CROWN
Install (New)  FASTENER  54  (b)
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 8 OF 10)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  44 of 65

### Page 13 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
5  Remove  FASTENER  76
Remove  FITTING, TRACK  146T5223-6  1
CROWN
6  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y30  1
CROWN
Install (New)  FASTENER  76  (b)
7  Remove  FASTENER  76
Remove  FITTING, TRACK  146T5223-6  1
CROWN
Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y30  1
CROWN
Install (New)  FASTENER  76  (b)
9  Remove  FASTENER  54
Remove  FITTING, TRACK  146T5223-5  1
CROWN
10  Apply  SEALANT  BMS5-95  (a)
Install (New)  FITTING-TRACK  146T5223Y29  1
CROWN
Install (New)  FASTENER  54  (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  F = FAR SIDE
(OPTIONAL)
COUNTERSINK  FASTENER
LENGTH/GRIP
EXAMPLE OF FASTENER SYMBOL  (OPTIONAL)  2314994
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 9 OF 10)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  45 of 65

### Page 14 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
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)(d)
DR  0.3160
COLLAR  BACC30BH10  16
BOLT, 100 DEG HEX  BACB30NY10K17  204  0.3120 -  (a) (b)(c)(d) (e)(f) (g) (h)
DR  0.3160
COLLAR  BACC30BH10  204
BOLT, 100 DEG HEX  BACB30NY10K20  70  0.3120 -  (a) (b)(c) (d)
DR  0.3160
COLLAR  BACC30BH10  70
(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.
(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.
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  BACB30NY10K17  4
BOLT, 100 DEG HEX DR  BACB30NY10K20  2
FIGURE 5: FUSELAGE - SECTION 46 - ALL CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 10 OF 10)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  46 of 65

### Page 15 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA  STA
1197  +88  1197  +110  1197  +132  1263  STA  1329  STA  1395  STA
RBL
54.75
33.00 -  RBL
RBL
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)
3095947
FIGURE 6: FUSELAGE - SECTION 46 - 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  47 of 65

### Page 16 (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  146T5223-5  (a)
CROWN
Inspect  FITTING, TRACK  146T5223-6  2  (a)
CROWN
Do an XRF inspection of the Cargo Track Crown Fittings to determine the material in accordance with
APPENDIX A.
FIGURE 6: FUSELAGE - SECTION 46 - 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  48 of 65

### Page 17 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA  STA
1197  1197  1197  STA  SIP  SIA  STA  STA  STA  STA
+88  +110  +132  1219  124  1263  1285  1307  1329  1341
RBL
54.75 -
33.00 -  RBL
RBL
11.00 -
F
FWD
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)  A-A  3103437
FIGURE 8: FUSELAGE - SECTION 46 - 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  49 of 65

### Page 18 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  STA
1373 1395
RBL
54.75
RBL
33.00
RBL
11.00
FWD
MAIN DECK FLOOR STRUCTURE
(VIEW IN THE DOWN DIRECTION)
(TYPICAL)
B-B
3103438
FIGURE 8: FUSELAGE - SECTION 46 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 2 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  50 of 65

### Page 19 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
1197+88
24 LOCATIONS
STA
1197+77
RBL
33.0
STA
1197+110
30 LOCATIONS  STA
1197
+121
110Г
RBL
33.0
3103439
FIGURE 8: FUSELAGE - SECTION 46 - 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  51 of 65

### Page 20 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA
1197+132
STA  28 LOCATIONS
1197
+121
chance chan chan chan donate a alan shan open phon
RBL
33.0
SIA
1219
26 LOCATIONS
STA
1230
RBL
33.0
D 10N  D 10N  D 10N
C 20  C 20  C 120
3103440
FIGURE 8: FUSELAGE - SECTION 46 - 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  52 of 65

### Page 21 (OCR)

PHETE
VIS  90
OEZI
8Z1
96Z1
O'ES
3103441
(TO SEENS)
satan to taed tas s

### Page 22 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
STA  22 LOCATIONS
1296
RBL  000000
33.0
G
STA
1329
28 LOCATIONS
STON ChON TON chON CON CON GIaN ShON ON CON ChON ON SON ChON
CHOn  CON CON
FWD
RBL
33.0
3103442
FIGURE 8: FUSELAGE - SECTION 46 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 6 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  54 of 65

### Page 23 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
26 LOCATIONS
STA
1362
C 10N
RBL
33.0
1373
26 LOCATIONS
1362  STA  10
KBL
33.0
3103443
FIGURE 8: FUSELAGE - SECTION 46 - 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  55 of 65

### Page 24 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
SIA
1395
28 LOCATIONS
CHON  CHON CON CONCHNA/ON  1Ô 12N CHON
CHON
RBL
33.0  FWD
3103444
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  54  (a)
Remove  FITTING, TRACK  146T5223-5  1  (a)
CROWN
2  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y29  1  (a)
CROWN
Install (New)  FASTENER  54  (a) (c)
З  Remove  FASTENER  54  (a)
Remove  FITTING, TRACK  146T5223-5  1  (а)
CROWN
4  Apply  SEALANT  BMS5-95  (a)(b)
Install (New)  FITTING-TRACK  146T5223Y29  1  (а)
CROWN
Install (New)  FASTENER  54  (a) (c)
FIGURE 8: FUSELAGE - SECTION 46 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 8 OF 11)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  56 of 65

### Page 25 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
5  Remove  FASTENER  76  (a)
Remove  FITTING, TRACK  146T5223-6  1  (a)
CROWN
6  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y30  1  (a)
CROWN
Install (New)  FASTENER  76  (a) (c)
7  Remove  FASTENER  76  (a)
Remove  FITTING, TRACK  146T5223-6  1  (a)
CROWN
Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y30  1  (a)
CROWN
Install (New)  FASTENER  76  (a) (c)
9  Remove  FASTENER  54  (a)
Remove  FITTING, TRACK  146T5223-5  1  (a)
CROWN
10  Apply  SEALANT  BMS5-95  (a) (b)
Install (New)  FITTING-TRACK  146T5223Y29  (a)
CROWN
Install (New)  FASTENER  54  (a)(c)
(a) At all locations where the Cargo Track Crown Fitting is found to not have a material composition consistent
with Ti-6AI-4V material, or alloy material could not be determined.
(b) 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.
(C)  Refer to fastener code table for fastener installation.
FIGURE 8: FUSELAGE - SECTION 46 - AFFECTED CARGO TRACK CROWN FITTINGS REPLACEMENT
(SHEET 9 OF 11)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  57 of 65

### Page 26 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
FASTENER
DIAMETER
(OPTIONAL)
LETTER CODE
HEAD LOCATION
D  6F  * N = NEAR SIDE  F = FAR SIDE
(OPTIONAL)
COUNTERSINK  FASTENER
LENGTH/GRIP
EXAMPLE OF FASTENER SYMBOL  (OPTIONAL)  2314994
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)
DR  0.3160
COLLAR  BACC30BH10  24
BOLT, 100 DEG HEX  BACB30NY10K14  16  0.3120 -  (a) (b) (c) (d)
DR  0.3160
COLLAR  BACC30BH10  16
C  BOLT, 100 DEG HEX  BACB30NY10K17 OR  204  0.3120 -  (a) (b) (c)(d) (g)
DR  BACB30NY 10K18 OR  0.3160
BACB30NY10K19
WASHER  BACW10BP5AP  204  (e)
WASHER  BACW10BP5AP  408  (f)
COLLAR  BACC30BH10  204
D  BOLT, 100 DEG HEX  BACB30NY10K20  70  0.3120 -  (a) (b)(c)(d)
DR  0.3160
COLLAR  BACC30BH10  70
(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.
(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 BACB30NY10K18 Bolt.
(T)  Use Quantity (2) Washers, installed under the collar if installing a BACB3ONY10K19 Bolt.
FIGURE 8: FUSELAGE - SECTION 46 - AFFECTED 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  58 of 65

### Page 27 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
Code  Name  Identification  Qty  Hole Dia  More Data
(9) — 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  BACB30NY10K17  4
BOLT, 100 DEG HEX DR  BACB30NY10K20  2
FIGURE 8: FUSELAGE - SECTION 46 - AFFECTED 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  59 of 65

### Page 28 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
GENERAL
1. Use this procedure to identify component composition consistent with Ti-6Al-4V material using a
handheld X-ray Fluorescence (XRF) spectrometry metal analyzer.
2. Operator must use an XRF device that meet the requirements in the PREPARATION FOR INSPECTION,
STANDARDIZATION, and INSPECTION sections given in this Appendix.
3. Operator must follow all applicable Radiation Health and Safety requirements as defined by their local,
state, and federal guidelines.
4. Operators must be enrolled in an applicable radiation exposure monitoring program and to be issued
personal dosimetry devices, (2) finger rings at a minimum. One finger ring for each hand.
5. Personnel performing XRF inspection in accordance with this procedure must be a qualified XRF
operator in accordance with all applicable training/procedures as defined by the device owner.
6. Qualified XRF operator training must include at a minimum radiation exposure safety, device operation,
and data analysis and interpretation.
7. Surfaces to be examined must be free from interferences such that would prevent safe and accurate
inspection, with an approximate uninterrupted and accessible surface area of 1 inch by 1 inch (as
defined by device aperture dimensions).
8. Measurements must be taken with the device aperture orientated perpendicular and fully covering the
inspection surface while in contact.
NOTE: XRF elemental analysis results will include the composition of any coating material and base
material. Therefore, alloy verification is dependent upon the presence of elemental vanadium
(V) to determine if the material meets requirements. Removal of surface coatings (e.g.,
aluminized enamel paint) at the inspection location is required, and could need to be reapplied
prior to use.
EQUIPMENT/MATERIALS
1. X-Ray Fluorescence Instruments
a. Instruments must have:
(1) An audible or visual alarm.
(2) Appropriate radiation hazard identification and documentation.
(3) A visual readout of the elemental measurements given.
(4) Alloy determination (i.e., General and Light Metals) functionality.
b. Instrument must:
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION
(SHEET 1 OF 6)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  60 of 65

### Page 29 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
(1) Be one of the following XRF Spectrometers:
(a) Model S1 Titan, Manufacturer: Bruker
(b) Model Niton XL3t, Manufacturer: ThermoFisher
(c) Model XL5 Plus, Manufacturer: ThermoFisher
(d) Model Niton XL2, Manufacturer: ThermoFisher
(e) Model X-MET8000, Manufacturer: Hitachi
(f) Model Explorer 5000, Manufacturer: Skyray Instruments
NOTE: Boeing will not provide XRF Spectrometers.
(2) Be approved to meet the requirements of this Appendix.
(3) Be free of damage such that would prevent the safe and accurate operation of the device.
(4) Successfully pass the daily check standard major alloying elemental chemistry acceptance
limits and alloy verification requirements.
2. Reference Standards
a. XRF device manufacturer's provided daily check standard with known composition band and alloy
determination.
b. Certified commercial purity titanium (Ti-CP) and Ti-6AI-4V standards that are National Institute of
Standards and Technology (NIST) traceable and/or a similar nationally accredited organization.
c. Standards must be free from grease, oil, and any foreign material contamination.
3. Accessories
a. Replacement Mylar tape to cover the device aperture.
b. Replacement fully charged device batteries and battery charger.
c. Method to document pre and post inspection results, which can include the following information
where applicable:
(1) XRF operator
(2) Date of inspection
(3) Device make and model
(4) Airplane make, model, line number or designation, and flight cycles
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION
(SHEET 2 OF 6)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  61 of 65

### Page 30 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
(5) Component part number
(6) Nonconformance identification number (if applicable)
(7) XRF scan number
(8) Device specific daily check standard results
(9) NIST traceable Ti-CP and Ti-6Al-4V check standard results
(10) Inspection results as defined in EVALUATION OF RESULTS
PREPARATION FOR INSPECTION
1. Apply personally assigned radiation dosimetry devices with applicable Radiation Health and Safety
guidance.
2. Read and review the requirements of this procedure and the device specific manufacturer supplied
operators manual.
3. Identify the inspection area to determine access, required assistance and/or safety equipment, and
hazardous conditions.
DO NOT REMOVE OR BYPASS RADIATION SAFETY INTERLOCK TO GAIN
ACCESS TO THE TEST SURFACE.
CAUTION
4. Verify access to the inspection surface to make sure instrument perpendicularity and full coverage of
device aperture.
NOTE: The ability to place instrument on sample surface could require movement of adjacent tubing,
removal of panels, or removal of select fasteners.
5. Remove a minimum 1 inch by 1 inch area of primer and topcoat to expose a bare surface of the part
for XRF inspection. Refer to SOPM 20-30-02 as an accepted procedure.
6. Make sure all non-radiation certified personnel are a minimum 8-foot radial sphere away from and out
of the direct path of the inspection area while the XRF is energized.
7. Apply applicable radiation hazard signage and barriers in an easily visible area for non-radiation certified
personnel.
8. Select equipment that meets the requirements of EQUIPMENT/MATERIALS
9. Visually inspect instrument. Do not use if damaged. Make sure Mylar film fully covers the instrument
aperture. Replace Mylar film if pierced, torn, or ruptured.
10.  Do a system check in accordance with manufacturer's instructions.
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION
(SHEET 3 OF 6)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  62 of 65

### Page 31 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
11. Make sure safety interlocks are operational.
12. Make sure all hazard and safety indicator lights are functional on the XRF device.
13. Do analysis of daily check standard to confirm device functionality prior to inspection by following the
STANDARDIZATION procedure below.
14. Do analysis of check standards of known Ti-6AI-4V and Ti-CP to confirm materials under evaluation
and ability to differentiate elemental vanadium (V) by following the STANDARDIZATION procedure
below.
STANDARDIZATION
1. Get the device manufacturer's provided daily check standard that meets the requirements of
REFERENCE STANDARD.
2. Set the device Main Filter to 20 to 30 second scan duration (or 20 to 30 second scan audible signal).
FAILURE TO MAKE SURE SNOUT IS PERPENDICULAR TO SAMPLE AND/OR
APERTURE IS NOT FULLY COVERED CAN LEAD TO SCATTERING OF X-RAYS
WARNING POSING A SAFETY RISK
3. Place the instrument snout as perpendicular as possible to the part standard and make sure the aperture
fully covers the test surface.
4. Start test by pressing and holding the start trigger of instrument. X-rays will be emitting from instrument,
keep contact between instrument and the sample until testing is complete.
5. Following instrument operator's manual, continue testing for 20 to 30 seconds total scan time.
6. Record test readings for all major alloying elements in the daily check standard including XRF run
number if applicable.
7. If the sample is correctly identified and all major alloying elements read within calculated acceptance
limits, proceed to step 11.
8 toy, perozer,  8. If the analyzer reports values outside the acceptance tolerance ranges specified, or incorrectly identifies
alloy, perform a system check per PREPARATION AND INSPECTION step 10.
9. Repeat steps 1 through 7 in STANDARDIZATION.
10. If the analyzer again fails to meet the acceptance tolerance ranges, DO NOT USE device, and contact
the device manutacturer.
11. Get the known Ti-CP and Ti-6AI-4V standards that meet the requirements of REFERENCE STANDARD.
12. Follow steps 13 through 20 for both the Ti-CP and Ti-6Al-4V standards.
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION
(SHEET 4 OF 6)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  63 of 65

### Page 32 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
FAILURE TO MAKE SURE SNOUT IS PERPENDICULAR TO SAMPLE AND/OR
APERTURE IS NOT FULLY COVERED CAN LEAD TO SCATTERING OF X-RAYS
WARNING POSING A SAFETY RISK.
13. Place the instrument snout as perpendicular as possible to the part standard and make the aperture
fully covers the test surface.
14. Start test by pressing and holding the start trigger of instrument. X-rays will be emitting from instrument,
keep contact between instrument and the sample until testing is complete.
15. Following instrument operator's manual, continue testing for 20 to 30 seconds total scan time.
16. Record results including XRF run number if available.
17.  If the sample is correctly identified and all major alloying elements are identified within the compositional
ranges specified within AMS 4911/4928, proceed to INSPECTION.
18.  If the analyzer reports values outside the acceptance compositional ranges specified, or incorrectly
identifies alloy, perform a system check per PREPARATION AND INSPECTION step 10.
19. Repeat steps 1 through 15 in STANDARDIZATION.
20.  If the analyzer again fails to meet the acceptance compositional ranges, DO NOT USE device, contact
the device manufacturer, or obtain a conforming XRF device.
INSPECTION
1. Access parts to be inspected, following guidance in PREPARATION FOR INSPECTION.
2. Perform part inspection, following the same device operation steps as in STANDARDIZATION.
3. Record vanadium (V) content results for each test on an inspection form.
4. Upon completion of ten (10) sequential inspections, repeat inspection of the daily check standard steps
1 through 9 in STANDARDIZATION. If XRF device does not pass reinspection due to suspect
overheating of the detector, wait approximately one (1) hour, then repeat steps 1 through 9 in
STANDARDIZATION.
5. If XRF device passes reinspection in step 4, proceed with additional inspections.
6. Repeat prior ten (10) sequential inspections if XRF failed STANDARDIZATION in-process check only
AFTER device has successfully passed STANDARDIZATION in-process check in steps 1 through 4
in INSPECTION.
EVALUATION OF RESULTS
1. Reject all parts that do not contain elemental Vanadium (V) with a composition range of 3.5% to 4.5%
except as provided by Step 2 EVALUATION OF RESULTS.
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION
(SHEET 5 OF 6)
Original Issue: October 17, 2025
Export Controlled ECCN: 9E991  767-53A0337 RB
See page 1 for details  64 of 65

### Page 33 (OCR)

REQUIREMENTS BULLETIN 767-53A0337
ALERT  ALERT
2. If elemental vanadium (V) is detected outside of the above stated range, repeat test one (1) additional
time, and record the results for both inspections (retain shot number for confirmation). If elemental
Vanadium is detected inside the above stated range in the repeated test, then the part is acceptable.
3. If inspected component is determined not to be a titanium alloy, verify item part number, location, and
whether a coating is present. Repeat the process steps in INSPECTION section, following the guidance
in step 1 and 2 in EVALUATION OF RESULTS.
NOTE: Removal of surface coatings (e.g., aluminized enamel paint) at the inspection location is
required, and may need to be reapplied prior to use.
* 2114 General Metals  # 2103 General Metals
Time 22.3 sec  Time 20.9 sec
Ti6-4 *1.5  TI-CP  - 0.0
Fle &  1 120
A1* 3.86 0.56
Si 0.305 0.102
Ti 91.32 0.58
4.30 0.19
Fe 0.198 0.039
Mo 0.003 0.001
Ele  | +20
Ti 99.72 0.56
Zr 0.010 0.001
[Main] Light  [Main] Light
Representative Ti-6AI-4V XRF Result  Representative Ti-CP XRF Result  3096639
APPENDIX A: PROCEDURE FOR X-RAY FLUORESCENCE INSPECTION
(SHEET 6 OF 6)
Original Issue: October 17, 2025
767-53A0337 RB
Export Controlled ECCN: 9E991
See page 1 for details  65 of 65

---
OpenAirDocs.org is an independent research project of [Contrail Labs](https://contraillabs.com/). It is not affiliated with the FAA or the NTSB. Source documents are U.S. government works in the public domain, except the copies of manufacturers’ service documents, which belong to their rights holders.