Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
July 4, 2023
Submitted
August 9, 2023
Operation
Air carrier
Aircraft
N965WN
Make and model
Boeing 7377H4
Aircraft serial
36677
Aircraft time
38,362 hours, 23,630 cycles
Part
Stringer
Part number
UNKNOWN
Condition
Cracked
Location
Zn 100 Fus Lower
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

AREA AFT OF FWD CARGO BAY HAS A CRACKED STRINGER AT THE AFT FASTENER; STR. 24R BS 520-540 WL 156<[01] EVALUATED CRACK AT FCB STRINGER 24R/H BS 539 DAMAGE FOUND TO BE OUT LIMITS IAW SRM 53-00-03-1A FIG 103 DETAIL A.;[02] VERIFIED APPLICABILITY FOR STR 24R/H AT FCB IAW SRM 53-00-03-2R-1 PAR 4. FIG 205;[03] CUTOUT AND REMOVED DAMAGE AT STRINGER SECTION 24R/H BETWEEN BS 500D+11' TO BS 539 IAW SRM 53-00-03-2R-1 PAR 4 STEPS A-B.;[04] UPDATE STEP 1 AND 2.RECEIVED NEW STRINGER SECTION P/N:HFAB53-STR-011;LOT:1533645-1;PO/N:927987/1 AND LOCATED AND DRILLED AT FCB STR 24R/H BETWEEN BS 500D+11' TO BS 539 AND APPLIED CHEMICAL CONVERISON COATING ON STRINGER SECTION IAW SRM 53-00-03-2R-1 FIG 205. REQUEST OK TO PRIME STRINGER SECTION.;[11] RECEIVED NEW STRINGER SECTION P/N:HFAB53-STR-011;LOT:1533645-1;PO/N:927987/1 ANDLOCATED AND DRILLED NEW PART IAW SRM 53-00-03-2R-1 REPAIR 1 AND SRM 51-40-05-0G-0.<BR>APPLIED CONVERSION COATING IAW AMM 51-21-41-370-803.<BR>APPLIED PRIMER IAW AMM 51-21-72-370-804.;[16] VERIFIED CORRECTION ACTION ITEM 15.;] INSTALLED REPAIR PARTS AT FCB BETWEEN BS 500D+5' TO BS 539 STRINGER 24 R/H IAW SRM 53-00-03-2R-1 REPAIR 1; FIG 205.

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