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 26. / [01] EVALUATED CRACK AT STRINGER 26R/H B/S 540 WL 153. STRINGER FOUND OUT OF LIMIT IAW SRM 53-00-03-1A-1 PARAGRAPH 4A(2)(A)1;[02] VERIFIED REPAIR APPLICABILITY FOR STR 26 R/H B/S 540 IAW SRM 53-00-03-2R-1 PAR 4 ; FIG 205.;[03] PERFORMED CUT-OUT THE DAMAGE STRINGER 26 R/H LOCATED BTW B/S 500D-520 AND REMOVED FASTENER ON STRINGER SECTION BTW B/S 500D+10 TO B/S 540 IAW SRM 53-00-03-2R-1 REPAIR 1;[04] PARTIAL UPDATE STEP#1 AND #2;[05] UPDATE CORRECTIVE ACTION #3:REMOVED FASTENERS BTW B/S 500D TO B/S 540 AND CUT AND REMOVED STRINGER SECTION AT B/S 500D+10' TO B/S 540 26R/H IAW SRM 53-00-03-2R-1 REPAIR 1;[06] VERIFIED CORRECTIVE ACTIONS 1; 2; AND 5.;[07] COMPLETED STEP 3.;[08] RECEIVED NEW STRINGER SECTION P/N: HFAB53-STR-011 ; LOT: 1493965-1 ; P.O/N: 871101/1 AND NEW HAT SECTION P/N:HFAB53-HS-011; LOT:1493919-1; P.O/N:871098/1.<BR><BR>LOCATED AND DRILLED NEW STRINGER SECTION AND HAT SECTION BTW BS 500D+4' TO BS 536 STR 26R/H AND APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-03-2R-1 REPAIR PAR 4 STEPS D-I FIG 205 ; REQUEST OK TO PRIMER ON REPAIR PARTS.;[15] INSTALLED REPAIR PARTS AT FCB BTW BS 500D+4' TO BS 536 STR 26R/H IAW SRM 53-00-03-2R-1 REPAIR PAR 4. FIG 205

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