Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
May 23, 2021
Submitted
June 28, 2021
Operation
Air carrier
Aircraft
N207WN
Make and model
Boeing 7377H4
Aircraft serial
34012
Aircraft time
52,378 hours, 31,227 cycles
Part
Stringer
Condition
Cracked
Location
Bs 540 S23r
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 IN FCB AIR MIX BAY; BS 540-2'; S-23R (MARKED) ; / [01] NO FOUND ALLOWABLE DAMAGE ON SRM IAW SRM 53-00-53-1A-1; STR 23 R; BS 540 TO BS 420 MUST BE REPAIR IAW SRM 53-00-03-2R-1 REPAIR 1; [02] REMOVED DAMAGE STRINGER 23R; BS 520 TO BS 540; IAW SRM 53-00-03-2R-1 REPAIR 1; [03] VERIFIED NO LIMITS FOUND FOR CRACKS IN SRM 53-00-53-1A-1. REPAIR PER SRM 53-00-03-2R-1 REPAIR 1 <BR><BR>VERIFIED REMOVAL OF DAMAGE FROM STRINGER 23R; BS 520 TO BS 540; IAW SRM 53-00-03-2R-1 REPAIR 1; [04] HFEC INSPECTED TRIMMED EDGE OF DAMAGE CUTOUT PER 737NDT PART 6 51-00-00 PROCEDURE 23. NO CRACKS FOUND. CAL ID IS000450 DUE 12/2021; [05] RECEIVED -7 REPLACEMENT STRINGER SECTION FROM OSS TO HT T6 PO#825903(JOB#540045); [06] VERIFIED RECEIPT OF -7 REPLACEMENT STRINGER SECTION FROM OSS TO HT T6 PO#825903(JOB#540045); [07] TRIMMED THE EDGE OF THE RAM AIR INLET FWD FAIRING BONDED PART(PN#149A7132-24)TO GET ACCESS FOR FASTENER INSTALLATION IAW EA#21-153-01513 REV A; [08] VERIFIED TRIMMING OF THE EDGE OF THE RAM AIR INLET FWD FAIRING BONDED PART(PN#149A7132-24)TO GET ACCESS FOR FASTENER INSTALLATION IAW EA#21-153-01513; WIP1; STEP 3; [09] FABRICATED -7 REPLACEMENT STRINGER SECTION AND APPLIED A CHEMICAL CONVERSION COATING TO REPAIR PART IAW SRM 53-00-03-2R-1 REPAIR 1 AND IAW EA# 21-153-01513 REV A. OK TO PRIME;

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