Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
June 10, 2021
Submitted
July 22, 2021
Operation
Air carrier
Aircraft
N418WN
Make and model
Boeing 7377H4
Aircraft serial
29823
Aircraft time
65,911 hours, 38,694 cycles
Part
Stringer
Condition
Cracked
Location
Bs 537 S23l
Stage of operation
IN
How discovered
9
Nature of condition
O
Precautionary procedure
K

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

CRACKED STRINGER END AT B.S. 537; STRINGER 23 LEFT. ; / [01] SRM 53-30-03-0I-1 IDENTIFICATION 1 AND SRM 53-00-03-2R-1 REPAIR 1 ARE APPLICABLE TO THIS A/C; [02] VERIFIED; SRM 53-30-03-0I-1 IDENTIFICATION 1 AND SRM 53-00-03-2R-1 REPAIR 1 ARE APPLICABLE TO THIS A/C; [03] CUT AND REMOVED THE DAMAGED PART OF THE STRINGER FROM BS 500D+11 TO BS 540 IAW SRM 53-00-03-2R-1 REPAIR 1 STEP 4B; [04] VERIFIED; CUT AND REMOVED THE DAMAGED PART OF THE STRINGER FROM BS 500D+11 TO BS 540 IAW SRM 53-00-03-2R-1 REPAIR 1 STEP 4B; [05] HFEC INSPECTED THE REPAIR AREA PER 737NDT PART 6 51-00-00 PROCEDURE 23 AND SRM 53-00-03-2R-1 STEP 4.C. NO CRACKS FOUND. CAL ID IS000450 S/N N500D000M120071.; [06] RECEIVED REPLACEMENT STRINGER SECTION FROM OSS TO HT T6 AND DYE PENETRANT INSPECTED/ NO DEFECTS NOTED ON PO#827657; [07] VERIFIED REPLACEMENT STRINGER RECEIVED FROM OSS TO HT T6 AND DYE PENETRANT INSPECTED/ NO DEFECTS NOTED ON PO#827657; [08] FABRICATED REPLACEMENT STRINGER SECTION FROM 7075T6#.036 BARE LOT#1451783/PO#827657 AND HAT SECTION SPLICE FROM PN#69-78188-12. TREATED IAW SRM 53-00-03-2R-1 REPAIR 1... OK TO PRIME REPAIR; [09] VERIFIED FABRICATION STRINGER SECTION FROM 7075T6#.036 BARE LOT#1451783/PO#827657 AND HAT SECTION SPLICE FROM PN#69-78188-12. TREATED IAW SRM 53-00-03-2R-1 REPAIR 1. OK TO PRIME REPAIR.

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