Service difficulty report · Nut Plate · Boeing 7377H4

Difficulty date
September 9, 2025
Submitted
October 14, 2025
Operation
Air carrier
Aircraft
N227WN
Make and model
Boeing 7377H4
Aircraft serial
34450
Aircraft time
65,042 hours, 39,022 cycles
Part
Nut Plate
Condition
Corroded
Location
Zone 600
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 RAIL NUT PLATE LOCATED OFSS308 INTERNAL CAVITY LEADING EDGE AT RT WING. EVALUATED RAIL NUT PLATE AND NOT FOUND ALLOWABLE DAMAGE ON SRM IAW SRM 57-20-01-1A-1 ALLOWABLE DAMAGE. REPLACED RAIL NUT PLATE LOCATED OF SS308 INTERNAL CAVITY LEADING EDGE AT RT WING IAW SRM 51-40-02 AND MEASURES OF CORROSION ARE : L: 1.741 INCH W: 0.288 INCH.

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