# Boeing Alert Service Bulletin 747-53A2907: Revision 1, part 4 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_Part4--BOEING
- Pages: 35
- PDF: https://openairdocs.org/files/sha256/a3/d8/a3d80bde84568fbb44e702f5987dd954d39e9ae0367cb7626dd4c090db94fda7
- Page: https://openairdocs.org/service-documents/boeing/747-53a2907/file/a3d80bde8456

## 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
(16) 16 LOCATIONS  STA
STRINGER  2181.10  SKIN
• S-4R
→ A
STRINGER SPLICE
FITTING
TYPICAL
FWD  T
17) 12 LOCATIONS  STA
SKIN  2181.10
: +
S-5R
S-6R
- S-7R
S-8R
S-9R
STRINGER SPLICE
STRINGER  FITTING
TYPICAL
-WD
2987450
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 10 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  131 of 260

### Page 2 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER SPLICE
8) 12 LOCATIONS  2181.10  STA  FITTING
S-10R
S-11R
STRINGER
TYPICAL
FITTING  STRINGER SPLICE  STA  (19) 8 LOCATIONS
2181.10
• S-12R
STRINGER
TYPICAL
VD  W
2987451
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 11 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  132 of 260

### Page 3 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER
RADIUS FILLER  - STRINGER SPLICE
FITTING
SKIN
RADIUS FILLER
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  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)(d) (e)
Install (New)  COLLAR  ВАССЗОВН( )  (с)
Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c) (d) (e)
Install (New)  COLLAR  ВАССЗОВН()  (c)
4  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН()  (с)
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 12 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  133 of 260

### Page 4 (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( )  (c)
6  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACBONX()K( )  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
7  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  BACC30BH( )  (c)
9  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACBONX()K( )  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
10  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
12  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
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  BACBONX()K( )  (c)(d) (e)
Install (New)  COLLAR  BACC30BH( )  (c)
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 13 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  134 of 260

### Page 5 (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  BACC3ОBH()  (с)
16  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c) (d) (e)
Install (New)  COLLAR  BACC3ОВH()  (с)
17  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c) (d)(e)
Install (New)  COLLAR  ВАССЗОВН( )  (с)
18  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  ВАССЗОВН( )  (с)
19  Install (Kept)  RADIUS FILLER  (a) (b)
Install (New)  BOLT  BACB3ONX()K()  (c)(d) (e)
Install (New)  COLLAR  BACC30BH()  (c)
(a) Install kept radius filler in the location noted during removal.
(0)  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 747-8P SRM 51-40-02 as an accepted
procedure.
(d)  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 747-8P SRM 51-40-02 as an accepted
procedure. For hole size limits, refer to 747-8P SRM 51-40-05 as an accepted procedure.
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 14 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  Export Controlled ECCN: 9E991  747-53A2907 RB
See page 1 for details  135 of 260

### Page 6 (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
2984578
FIGURE 12: 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 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  136 of 260

### Page 7 (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  2984583
FIGURE 12: 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 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  137 of 260

### Page 8 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2180
BL-O
STA
1960
0000000  BL-O
S-23R
2984579
FIGURE 12: 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 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  138 of 260

### Page 9 (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  2984580
AREA
FIGURE 12: 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 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  139 of 260

### Page 10 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
(TYPICAL)
STRINGER
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
(1)
B
END OF STRINGER
SPLICE
STRINGER
SPLICE
END OF STRINGER
SPLICE
FWD T
STRINGER SPLICE INSPECTION AREA
(TYPICAL
DETAILED  2984581
INSPECTION
FIGURE 12: 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 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  140 of 260

### Page 11 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
MIRROR
STRINGER SPLICE
TYPICAL CRACK
• STRINGER
RADIUS FILLER  *STRINGER SPLICE
STRINGER INSPECTION
(TYPICAL)
A-A
STRINGER
SKIN ~
*STRINGER SPLICE
RADIUS FILLER
INBD
TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE  B-B  2984582
FIGURE 12: 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 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  141 of 260

### Page 12 (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) (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 12: 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 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  142 of 260

### Page 13 (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 12: 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 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  143 of 260

### Page 14 (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  ĘL-O
1000
BL-O*
S-17L -
2986586
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 1 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  144 of 260

### Page 15 (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  4 LOCATIONS  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
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(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  145 of 260

### Page 16 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2360  BL-0
STA
2180
STA
1960
STA
1740
STA
1660
BL-O-
S-17L
2986593
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 3 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  146 of 260

### Page 17 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  1740
K
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-17L  S-16L  Q  - S-16L  - S-17L
DOOR AFT CARGO
FWD
VIEW LOOKING UP AND OUTBOARD
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(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  147 of 260

### Page 18 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
2180  1960
BL-0  - S-1L BL-O
S-1L  S
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  Y  • S-15L
S-16L  S-16L
S-17L  • S-17L
FWD
VIEW LOOKING UP AND OUTBOARD
2986617
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 5 OF 14)
Original Issue: March 03, 2022
Revision 1 March 14, 2025  747-53A2907 RB
Export Controlled ECCN: 9E991
See page 1 for details  148 of 260

### Page 19 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STRINGER  O 20 LOCATIONS  1000  STA
S-7L
S-8L  ***
S-9L
S-10L
TYPICAL
STRINGER
SPLICE FITTING  I FWD
STRINGER  2) 20 LOCATIONS  STA
1000
S-11L  * *
TYPICAL
STRINGER
SPLICE FITTING  G  FWD
STRINGER  ) 18 LOCATIONS  STA
1000
S-12L  * *  * + +
TYPICAL
A -
SPLICE FITTING  STRINGER  FWD  2986335
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 6 OF 14)
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### Page 20 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
SKIN  1) 8 LOCATIONS  STRINGER  1140
S-13L
S-14L
STRINGER  TYPICAL
SPLICE FITTING
FWD
5) 8 LOCATIONS  STA
SKIN  STRINGER  1140
S-15L
S-16L
TYPICAL
STRINGER
SPLICE FITTING
2986354
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 7 OF 14)
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See page 1 for details  150 of 260

### Page 21 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1960
STRINGER  6) 16 LOCATIONS
+ .  ...
S-1L
S-2L
S-3L
STRINGER
SPLICE FITTING  TYPICAL
K  FWD
STA
1960
STRINGER  7 16 LOCATIONS
+
S-4I
STRINGER
SPLICE FITTING
FWD
STA
1960
STRINGER  ) 20 LOCATIONS
S-5L
S-6L-
S-7L
- *
STRINGER
SPLICE FITTING  YPICA
FWD  2986487
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 8 OF 14)
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### Page 22 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
1960
STRINGER  9) 16 LOCATIONS
+ +
S-8L
S-9L  * *
STRINGER
SPLICE FITTING  YPICA
FWD
STA
1960
STRINGER  )) 16 LOCATIONS
* +
S-10L-  +  +  +
ITi  * *
STRINGER
SPLICE FITTING
12 LOCATIONS
STRINGER
S-11L  * *
STRINGER
SPLICE FITTING
YPICAL
FWD  2986536
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 9 OF 14)
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### Page 23 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
(12) 12 LOCATIONS  1960
STRINGER
S-12L
* * .
STRINGER
SPLICE FITTING
TYPICAL
FWD
STA  SKIN
STRINGER  13) 16 LOCATIONS  2180.10
S-1L
STRINGER  TYPICAL
SPLICE FITTING  R  FWD
STA
STRINGER  14) 16 LOCATIONS  2180.10  SK
S-2L  S-3L  ***
+
STRINGER  TYPICAL
SPLICE FITTING  S  FWD  2986797
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 10 OF 14)
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See page 1 for details  153 of 260

### Page 24 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
STRINGER  15) 16 LOCATIONS  2181.10  SKIN
S-4L  * *
STRINGER  YPICA
SPLICE FITTING
- W D
STA  SKIN
STRINGER  16) 12 LOCATIONS  2181.10
S-5L
S-6L
STRINGER  TYPICAL
SPLICE FITTING
FWD
STA  SKIN
STRINGER  17) 12 LOCATIONS  2181.10
S-7L  T T
STRINGER  TYPICAI
SPLICE FITTING  FWD  2986843
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 11 OF 14)
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See page 1 for details  154 of 260

### Page 25 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  SKIN
STRINGER  18) 12 LOCATIONS  2181.10
S-8L
S-9L  +  +
STRINGER  TYPICAL
SPLICE FITTING
W  FWD
STA  SKIN
STRINGER  19) 8 LOCATIONS  2181.10
S-10L
S-11L  +  +  +  Ť
HI
STRINGER  TYPICAL
SPLICE FITTING
FWD
STA  SKIN
STRINGER  20) 8 LOCATIONS  2181.10
S-12L -
STRINGER  TYPICAL
SPLICE FITTING  FWD  2986875
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 12 OF 14)
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### Page 26 (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  (a) (b)(c)
10  Inspect  STRINGER  (a) (b)(c)
11  Inspect  STRINGER  (a)(b)(c)
12  Inspect  STRINGER  (a) (b)(c)
13  Inspect  STRINGER  (a) (b)(c)
14  Inspect  STRINGER  (a)(b)(c)
15  Inspect  STRINGER  (0) (a) (e)
FIGURE 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 13 OF 14)
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See page 1 for details  156 of 260

### Page 27 (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)
20  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 13: 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 - GENERAL VISUAL INSPECTION
(SHEET 14 OF 14)
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See page 1 for details  157 of 260

### Page 28 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
This Figure applies only to: Group 2-3.
STA
2180
STA
1000
STA
1740
STA
1140  STA  _BL-O
STA  1140
1000
BL-0
S-17L -
Ламо
2984584
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
5
(SHEET 1 OF 9)
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### Page 29 (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  922228  S-7L
S-8L  77  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
INSPECTION
AREA
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
5
(SHEET 2 OF 9)
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### Page 30 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA
2360  BL-0
STA
2180
STA
1960
STA
1740
STA
1660
BL-O-
S-17L
2984587
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
5
(SHEET 3 OF 9)
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### Page 31 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
1960  1740
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
DOOR AFT CARGO
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984589
AREA
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
5
(SHEET 4 OF 9)
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### Page 32 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
STA  STA
2180  1960
BL-0  - S-1L BL-O
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
FWD
VIEW LOOKING UP AND OUTBOARD
INSPECTION  2984591
AREA
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
5
(SHEET 5 OF 9)
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### Page 33 (OCR)

REQUIREMENTS BULLETIN 747-53A2907
ALERT  ALERT
FRAME STA
(TYPICAL)
STRINGER
(TYPICAL)
END OF STRINGER
SKIN
MIRROR
B
1€30
B
END OF STRINGER
SPLICE
STRINGER
SPLICE  2) 3)4
END OF STRINGER
SPLICE
WD
STRINGER SPLICE INSPECTION AREA
(TYPICAL)
DETAILED  2984592
INSPECTION
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
5
(SHEET 6 OF 9)
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### Page 34 (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  2984595
B-B
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 7 OF 9)
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See page 1 for details  164 of 260

### Page 35 (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 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 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  165 of 260

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