Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
March 6, 2021
Submitted
March 31, 2021
Operation
Air carrier
Aircraft
N748SW
Make and model
Boeing 7377H4
Aircraft serial
29800
Aircraft time
73,763 hours, 43,887 cycles
Part
Stringer
Condition
Cracked
Location
Fwd Cargo
Stage of operation
IN
How discovered
V
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 STRINGER 25L LOCATED BS 540 FWD CARGO COMPARTMENT. REPAIRED STRINGER 25L LOC BTW 500D TO BS 540 FWD CARGO COMPARTMENT IAW B737-700 SRM 53-00-03-2R-1 REPAIR 1 DWG 143A3230 REV A MATERIAL USED 7075-T0 0.050' PO NR 202021328900101; 7075 TO 0.045' PO#2021 11309700101 AND HEAT TREATMENT AND CONVERTED TO TG AND MEASURE OF CRACK L=0.605' TOOL USED CALIPER PN 500-752-20 SN B16101278 DUE DATE 14-SEP-21 NDT USED PN NORTEC 500D SN NSWX22101V022237 DUE DATE 24-AUG-21 ULTRASONIC GAUGE PN 45MG SN 130064101 DUE DATE 08-APR-21.

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