Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
November 5, 2025
Submitted
December 15, 2025
Operation
Air carrier
Aircraft
N917WN
Make and model
Boeing 7377H4
Aircraft serial
36624
Aircraft time
57,012 hours, 34,522 cycles
Part
Stiffener
Condition
Cracked
Location
Zone 100
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 ON VERTICAL STIFFENER, BS 540, BL 0, BULKHEAD AREA IN THE FWD CARGO BAY. REPLACED THE VERTICAL STIFFENER IAW SRM 51-10-02; SRM 51-40-02, DWG 111A2001, SHEET 113, REV B, AND DWG 111A2001, SHEET 114, REV B.

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