Service difficulty report · Stringer · Boeing 7377Q8

Difficulty date
June 3, 2022
Submitted
June 30, 2022
Operation
Air carrier
Aircraft
N7850B
Make and model
Boeing 7377Q8
Aircraft serial
28238
Aircraft time
59,194 hours, 39,098 cycles
Part
Stringer
Condition
Cracked
Location
Fwd Cargo
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

CRACK ON FWD CARGO BAY BS 540 R/H STRINGER 25. / [01] PARTIAL UPDATE STEP 1-2;[02] EVALUATED CRACK AT STRINGER 25 R/H BS 540 STRINGER FOUND OUT OF LIMIT IAW SRM 53-00-03-1A-1 PARAGRAPH 4A(2)(A)1;[03] VERIFIED APPLICABILITY FOR STR 25 R/H IAW SRM 53-00-03-2R-1 <BR> PAR 4 ; FIG 206.<BR><BR>REMOVED FASTENERS BTW B/S 500D TO B/S 540 AND REMOVED DAMAGE BY TRIMMING OUT STRINGER SECTION BTW B/S 500D+12' AT STR 25 R/H IAW SRM 53-00-03-2R-1 <BR> PAR 4 ; FIG 206.;[04] PARTIAL UPDATE STEP 4-5.;[05] VERIFIED CORRECTIVE ACTION 2-3; AND UPDATED PARTIAL FOR FOR STEP 3.;[06] COMPLETED STEPS 6 AND 7.;[07] PARTIAL UPDATE STEP 8- SHEAR TIE REMOVAL;[08] RECEIVED NEW STRINGER SECTION P/N: HFAB53-STS-011 ; P.O/N: 871251/1 ; NEW J-ANGLE (2 EA) P/N:HFAB53-JA-011 ; LOT: 1493979-1 ; P.O/N:871249/1 ; NEW U-CHANEL P/N: HFAB53-UC-011 ; LOT : 1493980-1; P.O/N: 871252/1.<BR><BR>LOCATED AND DRILLED REPAIR PARTS AT FCB STR 25 R/H BTW BS 500D+6' TO BS 536 AND APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-03-2R-1 PAR 4 STEPS D - I FIG 206 AND EA NO.: 22-153-01692 REV. A. REQUEST OK TO PRIMER.16] INSTALLED REPAIR PARTS AT FCB STR 25 R/H BTW BS 500D+6' TO BS 536 IAW SRM 53-00-03-2R-1 PAR 4 ; FIG 206 AND EA NO.: 22-153-01692 REV. A.;[28] 'REPAIRED PER EA 22-153-01692.'

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