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 25. / [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;[13] FABRICATED/LOCATED AND DRILLED -7 REPLACEMENT STRINGER SECTION. TREATED; IAW SRM 53-00-03-2R-1 REPAIR 1 AND IAW EA#22-153-02453-WIP1... OK TO PRIME;[14] VERIFIED CORRECTIVE ACTIONS 12 AND 13. OK TO PRIME;[15] PRIMED -7 REPLACEMENT STRINGER SECTIONT AND REWORKED AREA. <BR>IAW SRM 53-00-03-2R-1 REPAIR 1 AND IAW EA#22-153-02453-WIP1... OK TO INSTALL;[16] VERIFIED PRIMER APPLICATION TO REPLACEMENT STRINGER SECTION. OK TO INSTALL REPLACEMENT STRINGER SECTION ONLY.;[17] RECIEVED (3EA) -2 ANGLES AND (3EA) -3 CHANNELS FROM OSS TO HT T6 IAW SR 53-00-03-2R-1 REPAIR 1. CUSTOMER RO#878780-SWA/JOB# 552154 AND CUSTOMER RO#878781-SWA/JOB#552155;[18] FABRICATED/LOCATED AND DRILLED A -2 CHANNEL AND (2EA) -3 ANGLES AND EXTENDED THE -3 ANGLES MINIMUM 0.1 INCH PAST THE STRINGER FLANGE LIP. TREATED; IAW SRM 53-00-03-2R-1 REPAIR 1 AND IAW EA#22-153-02453-WIP1. OK TO PRIME[22] INSTALLED REPAIR PARTS -7 REPLACEMENT STRINGER SECTION; -2 CHANNEL AND -3 (2EA) ANGLES IAW SRM 53-00-03-2R-1 REPAIR 1 AND PER EA#22-153-02453-WIP1.<BR><BR>COMPLETED PARTIAL STEPS 1 AND 2;[23] VERIFIED CORRECTIVE ACTION 22.<BR>COMPLETED STEPS 1 AND 2;[24] CRACK ON FORWARD CARGO BAY STRINGER END AT BS 540 RH STRINGER 25 WAS REPAIRED IAW EA 22-153-02453;[25] VERIFIED ALL STEPS COMPLETE.<BR>VERIFIED MEASUREMENTS.