# Boeing Alert Service Bulletin 747-53A2907: Revision 1, part 5 of 5

- Rights: © The Boeing Company. Filed by the FAA in regulations.gov docket FAA-2025-4000, the docket of AD 2026-13-03. Not covered by OpenAirDocs’ CC0 dedication.
- Document: [Boeing Alert Service Bulletin 747-53A2907](https://openairdocs.org/service-documents/boeing/747-53a2907.md)
- Title as filed: B747-53A2907 RB_Rev1_Part5--BOEING
- Pages: 95
- PDF: https://openairdocs.org/files/sha256/ca/cd/cacdaa7cbd662e50041d5eded2727c428df65ab84136b55276089cd1d5c86970
- Page: https://openairdocs.org/service-documents/boeing/747-53a2907/file/cacdaa7cbd66

## 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 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
4  Inspect  S-1L, STA 2180  (d) (e) (f)
Inspect  S-2L, STA 2180  (d) (e) (f)
Inspect  S-3L, STA 2180  (d) (e) (f)
Inspect  S-4L, STA 2180  (d) (e) (f)
Inspect  S-5L, STA 2180  (d) (e) (f)
Inspect  S-6L, STA 2180  (d) (e) (f)
Inspect  S-7L, STA 2180  (d) (e) (f)
Inspect  S-8L, STA 2180  (d) (e) (f)
Inspect  S-9L, STA 2180  (d) (e) (f)
Inspect  S-10L, STA 2180  (d) (e) (f)
Inspect  S-11L, STA 2180  (d) (e) (f)
Inspect  S-12L, STA 2180  (d) (e)(f)
(a) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1000, for any crack.
(b)  Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1140, for any crack.
(c)  Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1960, for any crack.
(d) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 2180, for any crack.
(e)  Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers.
(†)  A repaired stringer splice is defined as Structural Repair Manual (SRM) repairs, Boeing approved unpub-
lished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).
FIGURE 15: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
(SHEET 9 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  166 of 260

### Page 2 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 2-3.
STA
2180
STA
1000
1140  STA  STA  1140  STA  BL-O
1000
BL-0*
S-17L -
2984596
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
6
(SHEET 1 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  167 of 260

### Page 3 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1140  1000
BL-0 -  - BL-O
S-1L  S-1L
S-2L  S-2L
S-3L  S-3L
S-4L  S-4L
S-5L  S-5L
S-6L  S-6L
S-7L  S-7L
S-8L  S-8L
S-9L  • S-9L
S-10L  - S-10L
S-11L  S-11L
S-12L  S-12L
S-13L  S-13L
S-14L  S-14L
S-15L  S-15L
S-16L  S-16L
S-17L  S-17L
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984597
AREA
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
6
(SHEET 2 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  168 of 260

### Page 4 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2360  BL-O
STA
2180
STA
1960
STA
1740
STA
1660
BL-O-
S-17L
2984598
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
6
(SHEET 3 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  169 of 260

### Page 5 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  1740
BL-0 -  BL-O
S-1L  -S-1 L
S-2L  -S-2L
S-3L  - S-3L
00 00  -4L  -S-4L
-5L  -S-5L
S-6L  -S-6L
- S-7L
-S-BL
- S-9L
• S-10L
S-11L  • S-11L
S-12L  - S-12L
S-13L
S-14L
S-15L  • S-15L
S-16L  • S-16L
S-17L  - S-17L
DOOR AFT CARGO
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984601
AREA
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
6
(SHEET 4 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  170 of 260

### Page 6 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
2180  1960
BL-O  -$-1L  - BL-O
S-1L
• S-2L
S-2L
• S-3L
S-3L  • S-4L
S-4L  22222  • S-5L
S-5L
• S-6L
S-6L  za  - S-7L
S-7L  4ZZZZH
• S-8L
S-8L  27720  S-9L
S-9L  4122  S-10L
S-10L  • S-11L
S-11L  S-12L
S-12L  S-13L
S-13L  • S-14L
S-14L
- S-15L
S-15L
S-16L  • S-16L
S-17L  • S-17L
FWD
INSPECTION  2984602
AREA
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
(SHEET 5 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  171 of 260

### Page 7 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
(TYPICAL)
STRINGER
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
B
END OF STRINGER
SPLICE
STRINGER
SPLICE  +
END OF STRINGER
SPLICE
LEND
STRINGER SPLICE INSPECTION AREA
(TYPICAL)
DETAILED  2984603
INSPECTION
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
(SHEET 6 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  172 of 260

### Page 8 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
MIRROR
STRINGER SPLICE
TYPICAL CRACK
STRINGER
STRINGER SPLICE  RADIUS FILLERS
STRINGER INSPECTION
(TYPICAL)
A-A
STRINGER
SKIN
RADIUS FILLER
STRINGER SPLICE
INBD
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE  2984604
B-B
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
(SHEET 7 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  173 of 260

### Page 9 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
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 each airplane.
Step  Task  Name  Identification  Qty  More Data
1  Inspect  S-7L, STA 1000  (a) (e) (f)
Inspect  S-8L, STA 1000  (a) (e) (f)
Inspect  S-9L, STA 1000  (a) (e) (f)
Inspect  S-10L, STA 1000  (a) (e) (f)
Inspect  S-11L, STA 1000  (a) (e)(f)
Inspect  S-12L, STA 1000  (a) (e) (f)
2  Inspect  S-13L, STA 1140  (b) (e) (f)
Inspect  S-14L, STA 1140  (b)(e) (f)
Inspect  S-15L, STA 1140  (b)(e)(f)
Inspect  S-16L, STA 1140  (b) (e) (f)
Inspect  S-1L, STA 1960  (c)(e) (f)
Inspect  S-2L, STA 1960  (c)(e) (f)
Inspect  S-3L, STA 1960  (c)(e) (f)
Inspect  S-4L, STA 1960  (c)(e) (f)
Inspect  S-5L, STA 1960  (c)(e) (f)
Inspect  S-6L, STA 1960  (c)(e) (f)
Inspect  S-7L, STA 1960  (c)(e) (f)
Inspect  S-8L, STA 1960  (c)(e) (f)
Inspect  S-9L, STA 1960  (c)(e) (f)
Inspect  S-10L, STA 1960  (c)(e) (f)
Inspect  S-11L, STA 1960  (c)(e) (f)
Inspect  S-12L, STA 1960  (c)(e) (f)
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
(SHEET 8 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  174 of 260

### Page 10 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
4  Inspect  S-1L, STA 2180  (d) (e) (f)
Inspect  S-2L, STA 2180  (d) (e)(f)
Inspect  S-3L, STA 2180  (d) (e) (f)
Inspect  S-4L, STA 2180  (d) (e) (f)
Inspect  S-5L, STA 2180  (d) (e) (f)
Inspect  S-6L, STA 2180  (d) (e) (f)
Inspect  S-7L, STA 2180  (d) (e) (f)
Inspect  S-8L, STA 2180  (d) (e) (f)
Inspect  S-9L, STA 2180  (d) (e) (f)
Inspect  S-10L, STA 2180  (d) (e) (f)
Inspect  S-11L, STA 2180  (d) (e) (f)
Inspect  S-12L, STA 2180  (d) (e) (f)
(a) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1000, for any crack.
(b) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1140, for any crack.
(c)  Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1960, for any crack.
(d) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 2180, for any crack.
(e) Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers..
(†)  A repaired stringer splice is defined as Structural Repair Manual (SRM) repairs, Boeing approved unpub-
lished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).
FIGURE 16: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 5 OPTION
6
(SHEET 9 OF 9)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  175 of 260

### Page 11 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 2-3.
STA
2180
STA  c
1000
STA
1740
STA
1140  STA
STA  1140
1000
BL-0*
S-17L
2987108
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 1 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  176 of 260

### Page 12 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1140  1000
BL-O-  - BL-O
S-1L  S-1L
S-2L  S-2L
S-3L  S-3L
S-4L  S-4L
S-5L  S-5L
S-6L  4 LOCATIONS F  S-6L
S-7L  S-7L
S-8L  S-8L
S-9L  S-9L
S-10L  S-10L
S-11L  S-11L
S-12L  S-12L
S-13L  S-13L
S-14L  S-14L
S-15L  S-15L
S-16L  S-16L
S-17L  S-17L
FWD
VIEW LOOKING UP AND OUTBOARD
B  2987110
NOURE 00-0310-12 8E 2015)  FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  177 of 260

### Page 13 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2360  BL-O
STA
2180
STA
1960
STA
1740
STA
1660
BL-O
S-17L-
2987112
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 3 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  178 of 260

### Page 14 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  1740
K
BL-0 -  - BL-0
S-1L  -S-1L
S-2L  -S-2L
S-3L  -S-3L
S-4L  -S-4L
S-5L  -S-5L
S-6L  -S-6L
S-7L  - S-7L
S-9L  S-8L  N -  -S-8L  - S-9L
S-10L  -S-10L
- S-11L
- S- 12L
• S-13L
• S-14L
S-15L  - S-15L
S-16L  - S-16L
S-17L  - S-17L
DOOR AFT CARGO
FWD
VIEW LOOKING UP AND OUTBOARD
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  179 of 260

### Page 15 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
2180  1960
BL-O  - $-1L  - BL-O
S-1L  IS
S-2L
S-2L
S-3L
S-3L  S-4L
S-4L  S-5L
S-5L  S-6L
S-6L
S-7L
S-7L
S-8L
S-8L  S-9L
S-9L  S-10L
S-10L  • S-11L
S-11L  S-12L
S-12L  • S-13L
S-13L  - S-14L
S-14L  Y  • S-15L
S-15L
- S-16L
S-16L
S-17L  - S-17L
FWD
VIEW LOOKING UP AND OUTBOARD
2987114
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 5 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  180 of 260

### Page 16 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER  O 20 LOCATIONS  1000  STA  A
S-7L
S-8L
S-9L  ****
S-10L
STRINGER  TYPICAL  A —
SPLICE FITTING  FWD
STRINGER  3) 20 LOCATIONS  STA
1000
S-11L
TYPICAL
STRINGER
SPLICE FITTING  G  FWD
STRINGER  3) 14 LOCATIONS  STA  A -
1000
S-12L-  *****  *********
TYPICAL
STRINGER
SPLICE FITTING  FWD
2987115
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 6 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  181 of 260

### Page 17 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
4) 8 LOCATIONS  STA  1140
STRINGER  SKIN
-13l
S-14l
STRINGER
SPLICE FITTING  TYPICAL
FWD
5) 8 LOCATIONS  STA
STRINGER  SKIN  1140
S-15L
S-16L
TYPICAL
STRINGER
SPLICE FITTING
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 7 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  182 of 260

### Page 18 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1960
STRINGER  6) 16 LOCATIONS  A -
S-1L
S-2L-
S-3L
STRINGER
SPLICE FITTING  TYPICAL  A -
FWD
STA
1960
STRINGER  2 16 LOCATIONS
+
S-4L
STRINGER
SPLICE FITTING
FWD
STA
1960
STRINGER  8) 20 LOCATIONS
S-5L
S-6L-
S-7L
STRINGER  A →
SPLICE FITTING  TYPICAL
M  FWD  2987117
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 8 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  183 of 260

### Page 19 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1960
STRINGER  9) 16 LOCATIONS  A -
* *
S-81
S-91
STRINGER  A —
SPLICE FITTING  TYPICAL
FWD
STA
1960
STRINGER  0) 16 LOCATIONS
S-10L
STRINGER
SPLICE FITTING
(11) 12 LOCATIONS
STRINGER
+ *
S-11L-  +  +
STRINGER
SPLICE FITTING
TYPICAL
FWD  2987118
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 9 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  184 of 260

### Page 20 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
(12) 12 LOCATIONS  1960
STRINGER
S-12L-  * *
STRINGER
SPLICE FITTING
TYPICAL
STA
STRINGER  13) 16 LOCATIONS  2180.10  SKIN
S-1L
+
STRINGER  TYPICAL
SPLICE FITTING  R  FWD
STRINGER  14) 16 LOCATIONS  2180.10  STA  SKIN  A -
STRINGER  TYPICAL
SPLICE FITTING  S  FWD  A -  2987119
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 10 OF 15)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  185 of 260

### Page 21 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
STRINGER  15) 16 LOCATIONS  2181.10  SKIN
S-4L
STRINGER  TYPICAI
SPLICE FITTING
FWD
STA
STRINGER  (16) 12 LOCATIONS  2181.10  SKIN
S-5L
S-GL  +
STRINGER  TYPICAL
SPLICE FITTING
FWD
STA
STRINGER  17) 12 LOCATIONS  2181.10  SKIN
S-7L  **-
STRINGER  TYPICAL
SPLICE FITTING  FWD  A  2987120
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 11 OF 15)
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See page 1 for details  186 of 260

### Page 22 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER  18) 12 LOCATIONS  2181.10  STA  A -  SKIN
S-8L
S-9L
STRINGER  TYPICAL
SPLICE FITTING
FWD
STRINGER  19) 8 LOCATIONS  2181.10  STA  A  SKIN
S-10L
S-11L  +
STRINGER  TYPICAL
SPLICE FITTING
[EWD
STA
STRINGER  (20) 8 LOCATIONS  2181.10  SKIN
S-12L -
STRINGER  TYPICAL
SPLICE FITTING  Y  FWD  2987122
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 12 OF 15)
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See page 1 for details  187 of 260

### Page 23 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER
STRINGER SPLICE  - RADIUS FILLER
FITTING
SKIN
• RADIUS FILLER
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE  A-A  2987259
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 each airplane.
Step  Task  Name  Identification  Qty  More Data
Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН()  (c)
2  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c) (a) (e)
Install (New)  COLLAR  BАСС3ОВН()  (c)
Install (Kept)  RADIUS FILLER  (a) (o)
Install (New)  BOLT  BACB3ONX()K()  (c) (a) (e)
Install (New)  COLLAR  ВАССЗОВН()  (c)
4  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c) (a) (e)
Install (New)  COLLAR  BACC30BH()  (c)
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 13 OF 15)
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Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  188 of 260

### Page 24 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
5  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (с)
Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c) (d) (e)
Install (New)  COLLAR  ВАССЗОВН( )  (с)
Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
8  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН( )  (c)
9  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН( )  (c)
10  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН()  (c)
11  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН()  (с)
12  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН( )  (с)
13  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACCЗОВH()  (c)
14  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACCЗОВH()  (с)
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 14 OF 15)
Original Issue: March 03, 2022
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See page 1 for details  189 of 260

### Page 25 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
15  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
16  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACBONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC3ОВH()  (c)
17  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
18  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACBONX()K()  (c) (d) (e)
Install (New)  COLLAR  BACC3ОВH()  (c)
19  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC3ОВH()  (c)
20  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC3ОBH()  (c)
(a) Install kept radius filler in the location noted during removal.
(b) Apply BMS 5-95 faying surface seal between entire mating surfaces of the radius filler and the stringer.
Refer to SOPM 20-50-19 as an accepted procedure.
(C)  Install similar fasteners to the removed bolt and collar. Refer to 747-8F SRM 51-40-02 as an accepted
procedure.
(a)  Install fasteners wet with BMS 5-95 sealant. Refer to SOPM 20-50-19 as an accepted procedure.
(e) It is acceptable to oversize fasteners up to 1/64 inch. Refer to 747-8F SRM 51-40-02 as an accepted
procedure. For hole size limits refer to 747-8F SRM 51-40-05 as an accepted procedure.
FIGURE 17: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 15 OF 15)
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### Page 26 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
_ This Figure applies only to: Group 2-3.
STA
2180
STA
1000
STA
1740
STA
1140  STA
STA  1140  BL-O
1000
BL-0*
S-17L -
2984605
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 1 OF 9)
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See page 1 for details  191 of 260

### Page 27 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1140  1000
BL-0 -  - BL-0
S-1L  S-1L
S-2L  S-2L
S-3L  S-3L
S-4L  S-4L
S-5L  S-5L
S-6L  S-6L
S-7L  S-7L
S-8L  S-8L
S-9L  • S-9L
S-10L  - S-10L
S-11L  S-11L
S-12L  цилі  S-12L
S-13L  S-13L
S-14L  S-14L
S-15L  S-15L
S-16L  S-16L
S-17L  S-17L
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984606
AREA
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 2 OF 9)
Original Issue: March 03, 2022
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Export Controlled ECCN: 9E991
See page 1 for details  192 of 260

### Page 28 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2360  BL-O
STA
2180
STA
1960
STA
1740
STA
1660
BL-O-
S-17L
2984607
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 3 OF 9)
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See page 1 for details  193 of 260

### Page 29 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  1740
BL-0 -  BL-O
S-1L  -S-1 L
S-2L  -S-2L
S-3L  - S-3L
00 00  -4L  -S-4L
-5L  -S-5L
S-6L  -S-6L
- S-7L
-S-BL
- S-9L
• S-10L
S-11L  • S-11L
S-12L  - S-12L
S-13L  • S-13L
S-14L  • S-14L
S-15L  • S-15L
S-16L  • S-16L
S-17L  - S-17L
DOOR AFT CARGO
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984608
AREA
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 4 OF 9)
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Export Controlled ECCN: 9E991
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### Page 30 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
2180  1960
BL-O  -$-1L  - BL-O
S-1L
• S-2L
S-2L
• S-3L
S-3L  • S-4L
S-4L  27272  • S-5L
S-5L
• S-6L
S-6L
- S-7L
S-7L  4ZZZZH
• S-8L
S-8L  27720  • S-9L
S-9L  4122  S-10L
S-10L  • S-11L
S-11L  S-12L
S-12L  S-13L
S-13L  • S-14L
S-14L
- S-15L
S-15L
S-16L  • S-16L
S-17L  • S-17L
FWD
INSPECTION  2984609
AREA
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 5 OF 9)
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See page 1 for details  195 of 260

### Page 31 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
(TYPICAL)
STRINGER
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
B
END OF STRINGER
SPLICE
STRINGER
SPLICE  +
END OF STRINGER
SPLICE  L FWO
STRINGER SPLICE INSPECTION AREA
(TYPICAL)
DETAILED  2984610
INSPECTION
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 6 OF 9)
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See page 1 for details  196 of 260

### Page 32 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
MIRROR
STRINGER SPLICE
TYPICAL CRACK
STRINGER
STRINGER SPLICE  RADIUS FILLER
STRINGER INSPECTION
(TYPICAL)
A-A
STRINGER
- SKIN
STRINGER SPLICE
RADIUS FILLER
INBD
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE  B-B  2984611
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 7 OF 9)
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See page 1 for details  197 of 260

### Page 33 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
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 each airplane.
Step  Task  Name  Identification  Qty  More Data
1  Inspect  S-7L, STA 1000  (a) (e)(f)
Inspect  S-8L, STA 1000  (a) (e) (f)
Inspect  S-9L, STA 1000  (a) (e) (f)
Inspect  S-10L, STA 1000  (a) (e) (f)
Inspect  S-11L, STA 1000  (a) (e) (f)
Inspect  S-12L, STA 1000  (a) (e) (f)
2  Inspect  S-13L, STA 1140  (b)(e)(f)
Inspect  S-14L, STA 1140  (b)(e) (f)
Inspect  S-15L, STA 1140  (b) (e)(f)
Inspect  S-16L, STA 1140  (b) (e) (f)
Inspect  S-1L, STA 1960  (c)(e) (f)
Inspect  S-2L, STA 1960  (c)(e) (f)
Inspect  S-3L, STA 1960  (c)(e) (f)
Inspect  S-4L, STA 1960  (c)(e) (f)
Inspect  S-5L, STA 1960  (c)(e) (f)
Inspect  S-6L, STA 1960  (c)(e) (f)
Inspect  S-7L, STA 1960  (c)(e) (f)
Inspect  S-8L, STA 1960  (c)(e) (f)
Inspect  S-9L, STA 1960  (c)(e) (f)
Inspect  S-10L, STA 1960  (c)(e) (f)
Inspect  S-11L, STA 1960  (c)(e) (f)
Inspect  S-12L, STA 1960  (c)(e) (f)
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 8 OF 9)
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See page 1 for details  198 of 260

### Page 34 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
4  Inspect  S-1L, STA 2180  (d) (e) (f)
Inspect  S-2L, STA 2180  (d) (e) (f)
Inspect  S-3L, STA 2180  (d) (e) (f)
Inspect  S-4L, STA 2180  (d) (e) (f)
Inspect  S-5L, STA 2180  (d) (e) (f)
Inspect  S-6L, STA 2180  (d) (e) (f)
Inspect  S-7L, STA 2180  (d) (e) (f)
Inspect  S-8L, STA 2180  (d) (e) (f)
Inspect  S-9L, STA 2180  (d) (e) (f)
Inspect  S-10L, STA 2180  (d) (e) (f)
Inspect  S-11L, STA 2180  (d) (e) (f)
Inspect  S-12L, STA 2180  (d) (e) (f)
(a) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1000, for any crack.
(b) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1140, for any crack.
(c) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1960, for any crack.
(d) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 2180, for any crack.
(e) Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers.
(†)  A repaired stringer splice is defined as Structural Repair Manual (SRM) repairs, Boeing approved unpub-
lished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).
FIGURE 18: LEFT SIDE - S-7L TO S-12L AT STA 1000, S-13L TO S-16L AT STA 1140, S-1L TO S-12L AT
STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 6
(SHEET 9 OF 9)
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See page 1 for details  199 of 260

### Page 35 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 2-3.
STA
2180
STA  STA
1660  1000
STAO STA
1480
STA
1140
STA
BL-O.  1140
STA
1000
**-BL-O
S-17R
2987262
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 1 OF 15)
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Export Controlled ECCN: 9E991
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### Page 36 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1000  1140
BL-O-  - BL-O
S-1R  S-1R
S-2R  S-2R
S-BR  S-3R
S-4R  S-4R
S-5R  - S-5R
S-6R  G 4 LOCATIONS  S-6R
S-7R  S-7R
S-8R  S-8R
S-9R  S-9R
S-10R-  - S-10R
S-11R-  S-11R
S-12R  S-12R
S-13R  S-13R
S-14R  S-14R
S-15R  S-15R
S-17R-  K  • S-16R  • S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
2987263
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 2 OF 15)
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### Page 37 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
BL-O_  2360
STA
2180
STA
1740
STA
1480
-BL-O
~S-17R
C  2987264
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 3 OF 15)
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### Page 38 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1480  1660
BL-O --  BL-O
S-1R  S-1R
S-2R  S-2R
S-3R  S-3R
S-4R  S-4R
S-5R  S-5R
S-6R  S-6R
S-7R  S-7R
S-8R  S-8R
S-9R  • 5 LOCATIONS L  S-9R
S-10R  S-10R
S-11R  S-11R
S-12R  S-12R
S-13R  S-13R
S-14R  S-14R
S-15R  S-15R
S-16R  S-16F
S-17R  S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
2987265
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 4 OF 15)
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### Page 39 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1740  1960
BL-O -  - BL-O
S-1R  S-1R
S-2R  S-2R
S-3R  S-3R
S-4R  S-4R
S-5R  S-5R
S-6R  S-6R
S-7R  S-7R
S-8R  S-BR
S-9R  S-9R
S-10R  S-10F
S-11R  S-11R
S-12R  S-12R
S-13R  S-13P
S-14R  S-14R
S-15R  S-15R
S-16R  S-16R
S-17R  S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
2987266
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 5 OF 15)
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### Page 40 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  2180
BL-O •S-1R  BL-O
S-1R
S-2R
•S-2R
S-3R
S-3R
S-4R
S-5R  S-4R
• S-5R
S-6R
• S-6R
S-7R
•S-7R
S-8R
S-8R
S-9R
S-10R  • S-9R
S-11R-  S-10R
S-12R  •S-11R
S-13R-  -S-12R
S-14R  S-13R
S-15R  • S-14R
S-15R
S-16R  S-16R
S-17R  S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
F  2987268
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 6 OF 15)
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### Page 41 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
→ A  1000  STA  20 LOCATIONS Q  STRINGER
S-7R
*+*•  *****  S-8R  S-9R
S-10R
TYPICAL
STRINGER
G  SPLICE FITTING
STA  20 LOCATIONS (2)  STRINGER
1000
+  -S-11R
TYPICAL
STRINGER
FWD  SPLICE FITTING
STA  18 LOCATIONS (3  STRINGER
1000
- S-12R
TYPICAL
FWD  STRINGER  SPLICE FITTING  2987279
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 7 OF 15)
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### Page 42 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1140  8 LOCATIONS (
STRINGER  SKIN
S-13F
S-14R
STRINGER
TYPICAL  SPLICE FITTING
FWD  J
STA  8 LOCATIONS (5
1140  STRINGER  SKIN
+  S-16R  .S-15R
TYPICAL
FWD  STRINGER  SPLICE FITTING
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 8 OF 15)
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### Page 43 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
SKIN  1660  STA  12 LOCATIONS €  STRINGER
S-7R
S-8R
+  - S-9R
S-10R
S-11R
TYPICAL
STRINGER
SPLICE FITTING
STA
1960
16 LOCATIONS (7,  STRINGER
S-1R
S-2R
S-3R
+ T
STRINGER
SPLICE FITTING
TYPICAL
FWD  M
STA
1960  16 LOCATIONS (8)  STRINGER
S-4R
+  S-5R
S-6R
STRINGER
SPLICE FITTING
TYPICAL
FWD
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 9 OF 15)
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### Page 44 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  16 LOCATIONS g  STRINGER
1960
- S-7R
STRINGER
YPICAI  SPLICE FITTING
STA  12 LOCATIONS (10  STRINGER
1960
S-8R
S-9R
S-10R
STRINGER
TYPICAL  SPLICE FITTING
FWD
1960  STA  8 LOCATIONS (11)  STRINGER
- S-11R
STRINGER
SPLICE FITTING
TYPICAL
2987364
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 10 OF 15)
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### Page 45 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  8 LOCATIONS 12  STRINGER
1960
- S-12R
STRINGER
TYPICAL  SPLICE FITTING
R
SKIN  2180.10  STA  16 LOCATIONS (13  STRINGER
S-1R
- S-2R
S-3R
TYPICAL  STRINGER
SPLICE FITTING
S
SKIN  2181.10  STA  16 LOCATIONS (14  STRINGER
* + *  +  - S-4R
+
TYPICAL  STRINGER
SPLICE FITTING
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 11 OF 15)
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### Page 46 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
SKIN  STA
2181.10  12 LOCATIONS 15  STRINGER
— S-5R  * S-6R
TYPICAL  STRINGER
FWD  SPLICE FITTING
SKIN  STA
12 LOCATIONS  STRINGER
- S-7R
TYPICAL  STRINGER
FWD  SPLICE FITTING
STA
2181.10  12 LOCATIONS 17  STRINGER
S-8R
+  S-9R
TYPICAL  STRINGER
FWD  W  SPLICE FITTING
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 12 OF 15)
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### Page 47 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
SKIN  STA
2181.10  8 LOCATIONS (18  STRINGER
S-10R
+  S-11R
TYPICAL  STRINGER
SPLICE FITTING
WD
SKIN  STA
2181.10  8 LOCATIONS (19  STRINGER
- S-12R
TYPICAL  STRINGER
Y  SPLICE FITTING  2987551
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 13 OF 15)
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### Page 48 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER SPLICE
• STRINGER
RADIUS FILLER
SKIN
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE
A-A
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 each airplane.
Step  Task  Name  Identification  Qty  More Data
1  Inspect  STRINGER  (a) (c)(b)
2  Inspect  STRINGER  (a) (c)(b)
Inspect  STRINGER  (a) (c)(b)
4  Inspect  STRINGER  (a) (c) (b)
5  Inspect  STRINGER  (a)(c) (b)
Inspect  STRINGER  (a) (c)(b)
Inspect  STRINGER  (a) (c)(b)
8  Inspect  STRINGER  (a) (c)(b)
9  Inspect  STRINGER  (a) (c)(b)
10  Inspect  STRINGER  (a) (c) (b)
11  Inspect  STRINGER  (a) (c)(b)
12  Inspect  STRINGER  (a) (c) (b)
13  Inspect  STRINGER  (a) (c) (b)
14  Inspect  STRINGER  (a) (c)(b)
15  Inspect  STRINGER  (a) (c)(b)
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 14 OF 15)
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### Page 49 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
16  Inspect  STRINGER  (a) (c) (b)
17  Inspect  STRINGER  (a) (c) (b)
18  Inspect  STRINGER  (a) (c) (b)
19  Inspect  STRINGER  (a) (c) (b)
(a) Do a General Visual Inspection (GVI) of each free flange of the stringer at the stringer splice for radius
fillers at the fastener locations.
(b)  Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers.
(C)  A repaired stringer splice is defined as Structural Repair Manual (SRM) repairs, Boeing approved unpub-
lished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).
FIGURE 19: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - GENERAL VISUAL
INSPECTION
(SHEET 15 OF 15)
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### Page 50 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 2-3.
STA
2180
STA  STA
1000
1660
STA
1740 STA
1480
STA  STA
BL-O.  1140  1140
**-BL-O
~S-17R
2984669
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 1 OF 10)
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### Page 51 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1000  1140
BL-O -  - BL-O
S-1R  • S-1R
S-2R -  • 5-2R
S-3R -  • S-3R
S-4R  • S-4R
S-5R  • S-5R
S-6R  • S-6R
S-7R  9222229  S-7R
S-8R  • S-8R
S-9R  • S-9R
S-10R  - S-10R
S-11R  • S-11R
S-12R  S-12R
S-13R  • S-13R
S-14R  • S-14R
S-15R  G  - S-15R
S-16R  - 5-16R
S-17R  - S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
AREA  INSPECTION  B  2984670
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 2 OF 10)
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### Page 52 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
EL-O  2360
STA
2180
STA
1960
STA
1740
STA
1660
STA
1480
BL-O
~S-17R
2984671
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 3 OF 10)
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### Page 53 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1480  1660
BL-0 --  BL-O
S-1R  S-1R
S-2R  S-2R
S-3R  S-3R
S-4R  S-4R
S-5R  S-5R
S-6R  S-7R  972221  S-6R  S-7R
S-8R  S-8R
S-9R  S-9R
S-10R  ZZ)  S-10R
S-11R  S-11F
S-12R  S-12F
S-13R
S-14R  I4R
S-15R  S-15R
S-16R  S-16R
S-17R  S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984672
AREA
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 4 OF 10)
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### Page 54 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1740  1960
BL-0 •  - BL-O
S-1R  92221  S-1R
S-2R  S-2R
S-3R  • S-3R
S-4R  S-4R
S-5R  22  S-5R
S-6R  S-6F
S-7R  S-7R
S-8R  S-8R
S-9R  S-9R
S-10R  S-10R
S-11R  • S-11R
S-12R  S-12R
S-13R  S-13R
S-14R  S-14R
S-15R  S-15R
S-16R  S-16R
S-17R  S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  E  2984673
AREA
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 5 OF 10)
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### Page 55 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  2180
G
BL-O •S-1R  BL-O
• S-1R
S-2R
12222  - S-2R
S-3R
S-4R  - S-3R
- S-4R
S-5R
S-6R  002H  • 5-5R
- S-6R
S-7R
8-7R
S-8R
S-9R  • S-8R
S-10R  - S-9R
S-11R-  - S-10R
S-12R  • S-11R
S-13R  - S-12R
S-14R  • S-13R
S-15R  • S-14R
• S-15R
S-16R  S-16R
S-17R  S-17R
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  AREA  F  2984675
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 6 OF 10)
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### Page 56 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
STRINGER  (TYPICAL)
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
→ B
OEBAG
* B
END OF STRINGER
SPLICE
STRINGER
SPLICE
END OF STRINGER
SPLICE
STRINGER SPLICE INSPECTION AREA
(TYPICAL)
DETAILED  0084676
INSPECTION
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 7 OF 10)
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### Page 57 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
MIRROR
STRINGER SPLICE
TYPICAL CRACK
•STRINGER
• STRINGER SPLICE
STRINGER INSPECTION
(TYPICAL)
A-A
STRINGER
SKIN-
STRINGER SPLICE
INBD
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE  B-B  2984678
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 8 OF 10)
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### Page 58 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
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 each airplane.
Step  Task  Name  Identification  Qty  More Data
1  Inspect  S-7R, STA 1000  (a)(f) (g)
Inspect  S-8R, STA 1000  (a) (f) (g)
Inspect  S-9R, STA 1000  (a) (f) (g)
Inspect  S-10R, STA 1000  (a)(f) (g)
Inspect  S-11R, STA 1000  (a) (f) (g)
Inspect  S-12R, STA 1000  (a) (f) (g)
2  Inspect  S-13R, STA 1140  (b) (f) (g)
Inspect  S-14R, STA 1140  (b) (f) (g)
Inspect  S-15R, STA 1140  (b) (f) (g)
Inspect  S-16R, STA 1140  (b) (f) (g)
Inspect  S-7R, STA 1660  (c)(f) (g)
Inspect  S-8R, STA 1660  (c)(f) (g)
Inspect  S-9R, STA 1660  (c)(f) (g)
Inspect  S-10R, STA 1660  (c)(f) (g)
Inspect  S-11R, STA 1660  (c)(f) (g)
4  Inspect  S-1R, STA 1960  (d) (f) (g)
Inspect  S-2R, STA 1960  (d) (f) (g)
Inspect  S-3R, STA 1960  (d) (f) (g)
Inspect  S-4R, STA 1960  (d) (f) (g)
Inspect  S-5R, STA 1960  (d) (f) (g)
Inspect  S-6R, STA 1960  (d) (f) (g)
Inspect  S-7R, STA 1960  (d) (f) (g)
Inspect  S-8R, STA 1960  (d) (f) (g)
Inspect  S-9R, STA 1960  (d) (f) (g)
Inspect  S-10R, STA 1960  (d) (f) (g)
Inspect  S-11R, STA 1960  (d) (f) (g)
Inspect  S-12R, STA 1960  (d) (f) (g)
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 9 OF 10)
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### Page 59 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
5  Inspect  S-1R, STA 2180  (e)(f) (g)
Inspect  S-2R, STA 2180  (e)(f) (g)
Inspect  S-3R, STA 2180  (e)(f) (g)
Inspect  S-4R, STA 2180  (e)(f) (g)
Inspect  S-5R, STA 2180  (e)(f) (g)
Inspect  S-6R, STA 2180  (e) (f) (g)
Inspect  S-7R, STA 2180  (e)(f) (g)
Inspect  S-8R, STA 2180  (e)(f) (g)
Inspect  S-9R, STA 2180  (e) (f) (g)
Inspect  S-10R, STA 2180  (e) (f) (g)
Inspect  S-11R, STA 2180  (e)(f) (g)
Inspect  S-12R, STA 2180  (e)(f)(g)
(a) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1000, for any crack.
(b)  Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1140, for any crack.
(c)  Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1660, for any crack.
(d) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1960, for any crack.
(e)  Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 2180, for any crack.
Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers.
(g) A repaired stringer splice is defined as Structural Repair Manual (SRM) repairs, Boeing approved unpub-
lished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).
FIGURE 21: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 7
(SHEET 10 OF 10)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  224 of 260

### Page 60 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 2-3.
STA
2180
STA  STA
1660  1000
STA
1740  STA
1480
BL-O.  STA  1140  1140  STA
***-BL-O
~S-17R
2984680
FIGURE 22: RIGHT SIDE - S-7R TO S-12R AT STA 1000, S-13R TO S-16R AT STA 1140, S-7R TO S-11R
AT STA 1660, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R AT STA 2180 - STRINGER DETAILED
INSPECTION - CONDITION 7 OPTION 8
(SHEET 1 OF 10)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  225 of 260

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