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REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT This Figure applies only to: Group 1.
STA 1960 STA 1740
STA - -BL-O 1960 0000000000000000000 BL-0 00000000000 S-23L 2984489 FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (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 63 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT
STA STA 1960 1740 BL-0- -- - BL-0 S-1L - S-1L S-2L • S-2L S-3L E - 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 1202 - S-13L S-14L - S-14L S-15L- - S-15L S-16L - S-16L S-17L - S-17L S-18L - S-18L S-19L -S-19L 000 000000000000 S-23L - S-23L
LEFT SIDE
FWD MAIN ENTRY DOOR NO. 4
VIEW LOOKING UP AND OUTBOARD INSPECTION 2984490 AREA FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (SHEET 2 OF 8) Original Issue: March 03, 2022 Revision 1 March 14, 2025 747-53A2907 RB Export Controlled ECCN: 9E991 See page 1 for details 64 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT STA 2180 -BL-O BL-O 000000000000 8-231-- 2984491 FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (SHEET 3 OF 8) Original Issue: March 03, 2022 Revision 1 March 14, 2025 Export Controlled ECCN: 9E991 747-53A2907 RB See page 1 for details 65 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT
STA STA 2180 1960
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 - 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 S-18L • S-18L S-19L - S-19L 000000000 00000 S-23L - S-23L FWD
VIEW LOOKING UP AND OUTBOARD INSPECTION 2984493 AREA FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (SHEET 4 OF 8) Original Issue: March 03, 2022 Revision 1 March 14, 2025 747-53A2907 RB Export Controlled ECCN: 9E991 See page 1 for details 66 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT
FRAME STA (TYPICAL) STRINGER (TYPICAL)
END OF STRINGER SKIN MIRROR
END OF STRINGER SPLICE
STRINGER SPLICE 2) 3
END OF STRINGER SPLICE
STRINGER SPLICE INSPECTION AREA (TYPICAL) E DETAILED 2984494
INSPECTION FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (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 67 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 NBD TYPICAL PRODUCTION OR REPAIR STRINGER SPLICE B-B 2984495 FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (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 68 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-8L, STA 1740 (a)(d)(e) Inspect S-9L, STA 1740 (a) (d) (e) Inspect S-10L, STA 1740 (a)(d)(e) Inspect S-11L, STA 1740 (a)(d)(e) Inspect S-12L, STA 1740 (a)(d)(e) Inspect S-13L, STA 1740 (a) (d) (e) Inspect S-14L, STA 1740 (a)(d)(e) Inspect S-15L, STA 1740 (a) (d) (e) Inspect S-16L, STA 1740 (a) (d)(e) 2 Inspect S-1L, STA 1960 (b) (d) (e) Inspect S-2L, STA 1960 (b)(d) (e) Inspect S-3L, STA 1960 (b) (d)(e) Inspect S-4L, STA 1960 (b)(d) (e) Inspect S-5L, STA 1960 (b) (d)(e) Inspect S-6L, STA 1960 (b)(d) (e) Inspect S-7L, STA 1960 (b)(d) (e) Inspect S-8L, STA 1960 (b)(d) (e) Inspect S-9L, STA 1960 (b)(d) (e) Inspect S-10L, STA 1960 (b)(d) (e) Inspect S-11L, STA 1960 (b) (d)(e) Inspect S-12L, STA 1960 (b) (d)(e) FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (SHEET 7 OF 8) Original Issue: March 03, 2022 Revision 1 March 14, 2025 Export Controlled ECCN: 9E991 747-53A2907 RB See page 1 for details 69 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT Step Task Name Identification Qty More Data Inspect S-1L, STA 2180 (c) (d)(e) Inspect S-2L, STA 2180 (c)(d) (e) Inspect S-3L, STA 2180 (c) (d) (e) Inspect S-4L, STA 2180 (c) (d) (e) Inspect S-5L, STA 2180 (c) (d) (e) Inspect S-6L, STA 2180 (c)(d) (e) Inspect S-7L, STA 2180 (c) (d) (e) Inspect S-8L, STA 2180 (c) (d) (e) Inspect S-9L, STA 2180 (c)(d) (e) Inspect S-10L, STA 2180 (c) (d) (e) Inspect S-11L, STA 2180 (c) (d) (e) Inspect S-12L, 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 unpublished repair, or rework accomplished during production identified in the Significant Rework Log (SRL).
FIGURE 4: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - STRINGER DETAILED INSPECTION - CONDITION 1 OPTION 2 (SHEET 8 OF 8) Original Issue: March 03, 2022 Revision 1 March 14, 2025 747-53A2907 RB Export Controlled ECCN: 9E991 See page 1 for details 70 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT This Figure applies only to: Group 1.
STA 2180 STA 1960 1960 STA →BL-O STA 1740 BL-0 00000000000 S-23L 2987423 FIGURE 5: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L 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 71 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT
STA STA 1960 1740 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-10L G S-10L • S-9L 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 S-18L- - S-18L S-19L 000000000000K5 - S-19L S-23L - S-23L
LEFT SIDE
FWD MAIN ENTRY DOOR NO. 4
VIEW LOOKING UP AND OUTBOARD B 2987425 FIGURE 5: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L AT STA 2180 - RADIUS FILLER INSTALLATION (SHEET 2 OF 14) Original Issue: March 03, 2022 Revision 1 March 14, 2025 747-53A2907 RB Export Controlled ECCN: 9E991 See page 1 for details 72 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT STA 2180 _BL-O STA 1960 BL-Ó 0000 S-23L 2987426 FIGURE 5: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L 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 73 of 260
REQUIREMENTS BULLETIN 747-53A2907
ALERT ALERT
STA STA 2180 1960 BL-0 - -- - BL-0 S-1L - S-1L S-2L • S-2 L 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-14L W -S-14L - S-13L S-15L - S-15L S-16L -S-16L S-17L - S-17L S-18L •S-18L S-19L - S-19L 000 00000000 00000 S-23L - S-23L _ FWD
VIEW LOOKING UP AND OUTBOARD 2987428 FIGURE 5: LEFT SIDE - S-8L TO S-16L AT STA 1740, S-1L TO S-12L AT STA 1960 AND S-1L TO S-12L 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 74 of 260