# Boeing Alert Service Bulletin 747-53A2907: Revision 1, part 3 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_Part3--BOEING
- Pages: 31
- PDF: https://openairdocs.org/files/sha256/15/2d/152d829d17ecccb580abc4ea98089955289ae43113a5f973de408a9253142be6
- Page: https://openairdocs.org/service-documents/boeing/747-53a2907/file/152d829d17ec

## 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
1961.10  STA  16 LOCATIONS 10
• S-5R
TYPICAL  STRINGER SPLICE STRINGER  FITTING
STA
1960  16 LOCATIONS (11)
***  * +"
S-6R
S-7R
* ++  *+"
STRINGER  SPLICE FITTING  STRINGER
TYPICAL
1960  STA  12 LOCATIONS (12
- A
_ S-8R
S-9R
STRINGER  •STRINGER
SPLICE FITTING
TYPICAL
2986886
FIGURE 7: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - GENERAL VISUAL INSPECTION
(SHEET 8 OF 13)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  100 of 260

### Page 2 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1960
13) 12 LOCATIONS
STRINGER
**+**+
S-10R
S-11R
STRINGER SPLICE
TYPICAL  FITTING
FWD
STRINGER  - A  1960  STA  (14) 8 LOCATIONS
- S-12R
- A  STRINGER SFLICL
TYPICAL  FITTING
FWD  R
STA
2181.10  SKIN  (15) 16 LOCATIONS
STRINGER
S-1R
Ş-2R
S-3R
STRINGER SPLICE
TYPICAL  FITTING
-WD  S  2986887
FIGURE 7: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - GENERAL VISUAL INSPECTION
(SHEET 9 OF 13)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  101 of 260

### Page 3 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER  6) 16 LOCATIONS  2181.10  STA  SKIN
- S-4R
STRINGER SPLICE
FITTING
TYPICAL
-WD  T
17) 12 LOCATIONS  STA
SKIN  2181.10
: +
S-5R
S-9R
STRINGER  STRINGER SPLICE
FITTING
TYPICAL
u
2986888
FIGURE 7: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - GENERAL VISUAL INSPECTION
(SHEET 10 OF 13)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  102 of 260

### Page 4 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
(18) 12 LOCATIONS  • A  2181.10  STA  STRINGER SPLICE  FITTING
S-10F
S-11F
STRINGER
TYPICAL
STRINGER SPLICE
FITTING  STA  (19) 8 LOCATIONS
2181.10
S-12R
·+:
STRINGER
TYPICAL
FWD  W
2986889
FIGURE 7: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - GENERAL VISUAL INSPECTION
(SHEET 11 OF 13)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  103 of 260

### Page 5 (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
Inspect  STRINGER  (a) (b)(c)
Inspect  STRINGER  (a) (b)(c)
Inspect  STRINGER  (a) (b)(c)
4  Inspect  STRINGER  (a) (b) (c)
5  Inspect  STRINGER  (a) (b)(c)
6  Inspect  STRINGER  (a) (b) (c)
7  Inspect  STRINGER  (a) (b) (c)
Inspect  STRINGER  (0) (a) (e)
9  Inspect  STRINGER  (0) (a) (e)
10  Inspect  STRINGER  (0) (a) (e)
11  Inspect  STRINGER  (a) (b)(c)
12  Inspect  STRINGER  (0) (a) (e)
13  Inspect  STRINGER  (0) (a) (e)
14  Inspect  STRINGER  (0) (a) (e)
15  Inspect  STRINGER  (0) (a) (e)
FIGURE 7: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - GENERAL VISUAL INSPECTION
(SHEET 12 OF 13)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991
See page 1 for details  104 of 260

### Page 6 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
16  Inspect  STRINGER  (a) (b) (c)
17  Inspect  STRINGER  (a) (b) (c)
18  Inspect  STRINGER  (a) (b) (c)
19  Inspect  STRINGER  (a) (b)(c)
(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 7: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - GENERAL VISUAL INSPECTION
(SHEET 13 OF 13)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  105 of 260

### Page 7 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 1.
STA
2180
SIA
1960
STA
1740
BL-O _  STA
1960
STAO
0000000
00000000000  BL-O
- S-23R
2984496
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 1 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  106 of 260

### Page 8 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1740  1960
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-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-  z  -S-14R
S-15R  - S-15R
S-16R-  -S- 16R
S-17R  -S-17R
S-18R-  -S-18R
S-19R  -S-19R
00000  10000000
S-23R  -S-23R
RIGHT SIDE
MAIN ENTRY  FWD
DOOR NO. 4
VIEW LOOKING UP AND OUTBOARD
AREA  INSPECTION  B  2984499
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 2 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  107 of 260

### Page 9 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2180
BL-O
STA
1960
0000000  BL-O
→S-23R
2984503
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 3 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  108 of 260

### Page 10 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  2180
BL-0--  BL-0
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  -S-9R
S-10R  S-10R
S- 11R  -S-11R
S-12R  S-12R
S-13R  S-13R
S-15R S-16R  S-14R  - S-14R  -S-15R
- S-16R
S-17R-  S-17R
S-18R  S-18R
S-19R  S-19R
000000000  0000000
S-23R  -S-23R
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984504
AREA
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 4 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  109 of 260

### Page 11 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
(TYPICAL)
STRINGER
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
(+X
B
SPLICE
STRINGER
SPLICE
END OF STRINGER
SPLICE
FWD
STRINGER SPLICE INSPECTION AREA
(TYPICAL
INSPECTION  DETAILED  2984511
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 5 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  110 of 260

### Page 12 (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  2984515
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 6 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  111 of 260

### Page 13 (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-8R, STA 1740  (a) (d) (e)
Inspect  S-9R, STA 1740  (a) (d) (e)
Inspect  S-10R, STA 1740  (a) (d)(e)
S-11R, STA 1740  (a) (d) (e)
S-12R, STA 1740  (a) (d)(e)
S-13R, STA 1740  (a) (d) (e)
S-14R, STA 1740  (a) (a) (e)
S-15R, STA 1740  (a) (d) (e)
S-16R, STA 1740  (a) (d) (e)
2  S-1R, STA 1960  (b)(d) (e)
S-2R, STA 1960  (b)(d) (e)
S-3R, STA 1960  (b) (d) (e)
S-4R, STA 1960  (b)(d) (e)
S-5R, STA 1960  (b) (d)(e)
S-6R, STA 1960  (b) (d) (e)
S-7R, STA 1960  (b) (d) (e)
S-8R, STA 1960  (b) (d)(e)
S-9R, STA 1960  (b)(d)(e)
S-10R, STA 1960  (b) (d) (e)
S-11R, STA 1960  (b)(d) (e)
Inspect  S-12R, STA 1960  (b) (d) (e)
FIGURE 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 7 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  112 of 260

### Page 14 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
З  Inspect  S-1R, STA 2180  (c)(d) (e)
Inspect  S-2R, STA 2180  (c)(d) (e)
Inspect  S-3R, STA 2180  (c)(d) (e)
Inspect  S-4R, STA 2180  (c)(d) (e)
Inspect  S-5R, STA 2180  (c)(d) (e)
Inspect  S-6R, STA 2180  (c)(d) (e)
Inspect  S-7R, STA 2180  (c)(d) (e)
Inspect  S-8R, STA 2180  (c)(d) (e)
Inspect  S-9R, STA 2180  (c)(d) (e)
Inspect  S-10R, STA 2180  (c)(d) (e)
Inspect  S-11R, STA 2180  (c)(d) (e)
Inspect  S-12R, STA 2180  (c)(d) (e)
(a) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1740, 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 1960, 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 2180, for any crack.
(d) Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers.
(e) 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 9: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 3
(SHEET 8 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  113 of 260

### Page 15 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 1.
STA
2180
SIA
1960
STA
1740
BL-O _  STA
1960
STAO
0000000
00000000000  BL-O
- S-23R
2984516
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 1 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  114 of 260

### Page 16 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1740  1960
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-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-  z  -S-14R
S-15R  S-15R
S-16R-  -S- 16R
S-17R  -S-17R
S-18R-  -S-18R
S-19R  -S-19R
00000  10000000
S-23R  -S-23R
RIGHT SIDE
MAIN ENTRY  FWD
DOOR NO. 4
VIEW LOOKING UP AND OUTBOARD
AREA  INSPECTION  B  2984517
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 2 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  115 of 260

### Page 17 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2180
BL-O
STA
1960
0000000  BL-O
→S-23R
2984518
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 3 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  116 of 260

### Page 18 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  2180
BL-0--  BL-0
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  -S-9R
S-10R  S-10R
S- 11R  -S-11R
S-12R  S-12R
S-13R  S-13R
S-15R S-16R  S-14R  - S-14R  -S-15R
- S-16R
S-17R-  S-17R
S-18R  S-18R
S-19R  S-19R
000000000  0000000
S-23R  -S-23R
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984519
AREA
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 4 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  117 of 260

### Page 19 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
(TYPICAL)
STRINGER
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
(1
B
SPLICE
STRINGER
SPLICE
END OF STRINGER
SPLICE
FWD T
STRINGER SPLICE INSPECTION AREA
(TYPICAL
E
DETAILED  2984520
INSPECTION
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 5 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  118 of 260

### Page 20 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
MIRROR
STRINGER SPLICE
TYPICAL CRACK
• STRINGER
STRINGER SPLICE
STRINGER INSPECTION
(TYPICAL)
A-A
STRINGER
~ NIXS
STRINGER SPLICE
INBD
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE  2984521
B-B
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 6 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  119 of 260

### Page 21 (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-8R, STA 1740  (a) (d)(e)
Inspect  S-9R, STA 1740  (a) (d) (e)
Inspect  S-10R, STA 1740  (a) (d)(e)
S-11R, STA 1740  (a) (a) (e)
S-12R, STA 1740  (a) (d)(e)
S-13R, STA 1740  (a) (d) (e)
S-14R, STA 1740  (a) (d) (e)
S-15R, STA 1740  (a) (d) (e)
S-16R, STA 1740  (a) (d) (e)
2  S-1R, STA 1960  (b) (d) (e)
S-2R, STA 1960  (b)(d) (e)
S-3R, STA 1960  (b) (d) (e)
S-4R, STA 1960  (b) (d) (e)
S-5R, STA 1960  (b) (d)(e)
S-6R, STA 1960  (b) (d) (e)
S-7R, STA 1960  (b) (d)(e)
S-8R, STA 1960  (b) (d)(e)
S-9R, STA 1960  (b)(d)(e)
S-10R, STA 1960  (b) (d) (e)
S-11R, STA 1960  (b)(d) (e)
Inspect  S-12R, STA 1960  (b)(d) (e)
FIGURE 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 7 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  120 of 260

### Page 22 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
Step  Task  Name  Identification  Qty  More Data
З  Inspect  S-1R, STA 2180  (c)(d) (e)
Inspect  S-2R, STA 2180  (c)(d) (e)
Inspect  S-3R, STA 2180  (c)(d) (e)
Inspect  S-4R, STA 2180  (c)(d) (e)
Inspect  S-5R, STA 2180  (c)(d) (e)
Inspect  S-6R, STA 2180  (c)(d) (e)
Inspect  S-7R, STA 2180  (c)(d) (e)
Inspect  S-8R, STA 2180  (c)(d) (e)
Inspect  S-9R, STA 2180  (c)(d) (e)
Inspect  S-10R, STA 2180  (c)(d) (e)
Inspect  S-11R, STA 2180  (c)(d) (e)
Inspect  S-12R, STA 2180  (c)(d) (e)
(a) Do a detailed inspection of the visible areas of affected stringers and the stringer splice fitting, forward
and aft of STA 1740, 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 1960, 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 2180, for any crack.
(d) Can be a production or repaired stringer splice. The stringer splices could have been repaired with or
without radius fillers.
(e) 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 10: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 3 OPTION 4
(SHEET 8 OF 8)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  121 of 260

### Page 23 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 1.
STA
2180
STA
1960
STA
1740
STA
BL-0~  1960
STAO
0000000000000000000  \ BL-O
00000000000
FEND  →S-23R
2987441
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 1 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  122 of 260

### Page 24 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1740  1960
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-6R
S-7R  - S-7R
S-8R  - S-8R
S-9R  S-10R  G  S-10R  - S-9R
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
S-19R-  S-18R  005000000000000  к -  - S-18R  - S-19R
0000
S-23R  - S-23R
RIGHT SIDE
MAIN ENTRY
DOOR NO. 4  FWD
VIEW LOOKING UP AND OUTBOARD
2987442
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 2 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  123 of 260

### Page 25 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2180
BL-0~
STA
1960
000
→S-23R
2987443
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 3 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  124 of 260

### Page 26 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  2180
S
BL-Q-  - 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-  - S-9R
S-10R  -S-10R
S-11R-  •S-11R
S-12R  -S-12R
S-13R  S-14R  W  -S-14R  -S-13R
S-15R-  -S-15R
S-16R  - S-16R
S-17R-  • S-17R
S-18R  -S-18R
S-19R  -S-19R
00000000  0000
S-23R  -S-23R
FWD
VIEW LOOKING UP AND OUTBOARD
2987444
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 4 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  125 of 260

### Page 27 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
197.10  SKIN  8 LOCATIONS 1 STRINGER
S-8R
S-9R
TYPICAL
STRINGER
-WD  SPLICE FITTING
STA
1741.10  SKIN  8 LOCATIONS (2  • STRINGER
S-10R
TYPICAL
STRINGER
-WD  SPLICE FITTING
SIA
1741.10  SKIN  8 LOCATIONS (3  STRINGER
- S-11R
TYPICAL
STRINGER  2987445
VD  G  SPLICE FITTING
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 5 OF 14)
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See page 1 for details  126 of 260

### Page 28 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER  4) 8 LOCATIONS  STA
1741
- A
S-12R
TYPICAL
STRINGER
FWD  SPLICE FITTING
STA
STRINGER  1741.10  STRINGER
SPLICE FITTING
) 8 LOCATIONS
S-13R
FWD
) 16 LOCATIONS
STRINGER
- A
S-14K
S-15F
STRINGER
YPICA  SPLICE FITTING
-WD  2987446
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 6 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  127 of 260

### Page 29 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1741.10  7 12 LOCATIONS
STRINGER
- S-16R
STRINGER  TYPICAL
SPLICE FITTING
K
STA
1960  (8) 16 LOCATIONS
STRINGER
- * *
S-1R
- * *  - S-2R
S-3R
TYPICAL  STRINGER
SPLICE FITTING
STA
1960
9) 16 LOCATIONS
STRINGER
— S-4R
TYPICAL  STRINGER
SPLICE FITTING  2987447
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 7 OF 14)
Original Issue: March 03, 2022
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### Page 30 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
1961.10  STA  16 LOCATIONS (10
- S-5R
STRINGER SPLICE  STRINGER
TYPICAL  FITTING
FWD
STA
1960  16 LOCATIONS 1
* T  *+ *
+  ******
_S-6R
S-7R
******
STRINGER
SPLICE FITTING  STRINGER
TYPICAL
_ FWD
1960  STA  12 LOCATIONS (12
_ S-8R
S-9R
STRINGER  STRINGER  SPLICE FITTING
TYPICAL
2987448
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 8 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  129 of 260

### Page 31 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1960
13) 12 LOCATIONS
STRINGER
*******
S-10R
S-11R
******
****
STRINGER SPLICE
TYPICAL  FITTING
FWD
STA  14) 8 LOCATIONS
STRINGER  1960
- S-12R
STRINGER SPLICE
TYPICAL  FITTING
WD  R
2181.10  SKIN  (15) 16 LOCATIONS
STRINGER
S-1R
• S-2R
S-3R
STRINGER SPLICE
TYPICAL  FITTING
S  2987449
FIGURE 11: RIGHT SIDE - S-8R TO S-16R AT STA 1740, S-1R TO S-12R AT STA 1960 AND S-1R TO S-12R
AT STA 2180 - RADIUS FILLER INSTALLATION
(SHEET 9 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  130 of 260

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