Service difficulty report · Sill Drain · Boeing 7377H4

Difficulty date
October 27, 2025
Submitted
December 1, 2025
Operation
Air carrier
Aircraft
N234WN
Make and model
Boeing 7377H4
Aircraft serial
32502
Aircraft time
64,044 hours, 38,686 cycles
Part
Sill Drain
Condition
Corroded
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

CORROSION ON LOWER SILL LOCATED BTW BS794.3 AND BS847 RBL26 AND WL 156 AFT CARGO COMPARTMENT. REPLACED LOWER SILL LOCATED BTW BS794.3 AND BS847 RBL26 AND WL156 AFT CARGO COMPARTMENT IAW SRM 51-10-02; SRM 51-40-02 AND DWG 146A8340 SHEET 28 REV -.

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