Service difficulty report · Stringer · Boeing 7377H4

Difficulty date
April 3, 2021
Submitted
April 26, 2021
Operation
Air carrier
Aircraft
N221WN
Make and model
Boeing 7377H4
Aircraft serial
34259
Aircraft time
53,548 hours, 31,478 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 26R AT BS 540 FWD CARGO COMPARTMENT. EVALUATED ALLOWABLE DAMAGE LIMITS OF STR-26R AND FOUND OUT OF LIMITS DUE TO CRACK IS NOT PERMITTED FABRICATE REPAIR PARTS OF MATERIAL ALUMINUM SHEET PN 70750.045' PO: 2021 113097 AND PN 7075 TO 0.050' PO 2021 121145 HEAT TREATED AND CONVERTED FROM TO TO CONDITION T6 AND PERFORMED PERMANENT REPAIR ON STR26R LOC BS540 TO BS500D +100' IAW B737700 SRM 5300032R1 REPAIR 1

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