Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
July 20, 2026
Submitted
August 5, 2026
Operation
Air carrier
Aircraft
N495WN
Make and model
Boeing 7377H4
Aircraft serial
33869
Aircraft time
70,911 hours, 42,522 cycles
Part
Stiffener
Condition
Corroded
Location
Zone 500
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 FOUND ON LT L/E STIFFNER COMMON TO NR 4 TAI DUCT TAB AT OFSS 308 SS 73. REMOVED LT L/E STIFFNER COMMON TO NR 4 TAI DUCT TAB AT OFSS 308 SS 73 IAW SRM 51-40-02-0G-0. INSTALLED LT L/E STIFFNER COMMON TO NR 4 TAI DUCT TAB AT OF SS 308 SS 73 IAW SRM 51-40-02-0G-0 AND AIPC 57-40-00-17.

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