Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
March 12, 2025
Submitted
March 31, 2025
Operation
Air carrier
Aircraft
N435WN
Make and model
Boeing 7377H4
Aircraft serial
32455
Aircraft time
72,183 hours, 43,264 cycles
Part
Stiffener
Condition
Corroded
Location
Zone 200
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

CORROSION ON PRESSURE DECK STIFFENER AT STA 708+2; FROM LBL 62 TO 70; WL 200.<[01] FABRICATED A NEW STIFFENER FROM 7075-T0 0.071' LOT 1523843-1 IAW SRM 51-30-01 AND DWG 144A7713 REV: B. REMOVED AND REPLACED THE CORROEDED STIFFENER ON PRESSURE DECK WITH THE STIFFENER AT STA 708+2; FROM LBL 62 TO 70; WL 200. IAW SRM 51-40-02.;[02] CORRECTIVE RII ACTION ITEM 1 VERIFIED; CARD COMPLETE.

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