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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(†) A repaired stringer splice is defined as Structural Repair Manual (SRM) repairs, Boeing approved unpublished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).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
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
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
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
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
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
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
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
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
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 unpublished 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
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
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