Service difficulty report · Stiffener · Boeing 7377H4

Difficulty date
October 8, 2021
Submitted
November 11, 2021
Operation
Air carrier
Aircraft
N450WN
Make and model
Boeing 7377H4
Aircraft serial
32470
Aircraft time
58,641 hours, 34,716 cycles
Part
Stiffener
Condition
Corroded
Location
Fuselage
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 SUPPORT STIFFENER AT STA 721; LBL 68; WL 202. FOUND TO BE OUT OF LIMITS. DUE TO HAVING NO ALLOWABLE DAMAGE FOUND IN SRM. REPAIR BY REPLACEMENT. INSTALLED NEW STIFFENER AT BS 721 LBL 68 WL 202 IAW SRM 51-40-02-0G-0 AND DWG 144A7713 APPLIED FILLET SEAL IAW AMM 51-31-00-390-604 AND APPLIED CIC IAW AMM 51-21-91-620-802.

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