Service difficulty report · Stringer · Boeing 737790

Difficulty date
August 9, 2022
Submitted
August 26, 2022
Operation
Air carrier
Aircraft
N560WN
Make and model
Boeing 737790
Aircraft serial
30542
Aircraft time
70,697 hours, 34,642 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 STRINGER END AT BS 540 R/H STRINGER 26. / [01] SRM 53-00-03-1A-1 ALLOWABLE DAMAGE 1 AND SRM 53-00-03-2R-1 REPAIR 1 ARE APPLICABLE TO THIS A/C [09] RECIVED NEW STRINGER SECTION FORMED FROM OSS PO NUMBER 878535 /1 DYE PENETRANT INSPECTED IAW BAC5423 AND COSTUMER RO NO 878535-SWA.;[10] FABRICATED REPAIR PARTS NEW REPLACEMENT STRINGER SECTION FROM HFAB53-STS-011 PO NUMBER 878535 /1; -1 HAT SECTION SPLICE FROM MATERIAL 69-78188-14 LOT# 1460965-1 LOCATED AND DRILLED REPAIR PARTS AND APPLIED CHEMICAL CONVERSION COATING IAW SRM 53-00-03-2R-1 REPAIR 1 OK TO PRIMER;[11] VERIFIED CORRECTIVE ACTION 10.<BR>OK TO PRIME;[12] APPLIED PRIMER AT REPAIR PARTS STRINGER SECTION AND SPLICE PER SRM 53-00-03-2R-1 REP.1.<BR>OK TO INSTALL REPAIR PARTS;[13] VERIFIED CORRECTIVE ACTION 12.<BR>OK TO INSTALL;[14] INSTALLED STRINGER SECTION AND HAT SECTION SPLICE AT STR 26R BETWEEN BS 500D + 11 TO BS 540 PER SRM 53-00-03-2R-1 REPAIR 1;[15] VERIFIED CORRECTIVE ACTION 14;[16] COMPLETED STEPS 1-2;[17] APPLIED FILLET SEALANT AND CORROSION INHIBITING COMPOUND TO THE REWORKED AREAS IAW SRM 53-00-03-2R-1 REPAIR 1 STEPS K & L;[18] COMPLETED STEPS 1 AND 2;[19] VERIFIED CORRECTIVE ACTION 17.<BR>VERIFIED MEASUREMENT TABLE