Copy · B747-53A2907 RB_Rev1_Part3--BOEING · 31 pages

© 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.

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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

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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

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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

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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

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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

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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 unpublished 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

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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

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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

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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

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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

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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

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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

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