Service difficulty report · Fitting · Boeing 7377H4

Difficulty date
June 21, 2025
Submitted
June 24, 2025
Operation
Air carrier
Aircraft
N489WN
Make and model
Boeing 7377H4
Aircraft serial
33855
Aircraft time
65,959 hours, 39,487 cycles
Part
Fitting
Condition
Corroded
Location
Zone 400
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

STRAKELET BOX ASSY - STUB FITTING DAMAGED BEYOND SRM REPAIR. #1 ENGINE PYLON O/B BONDING STRAP UPPER ATTACH POINT CORRODED UNDER PANEL 431CL AFT END OF PANEL<[01] REMOVED AND THEN RE-INSTALLED BACK 4 EA. FASTENERS TO F.O.M IAW SRM 51-40-02;[02] ORIGINAL THICKNESS OF SUPPORT FITTING 0.100'. CENTER OF HOLE TO EDGE OF BLENDED AREA 0.500'. LENGTH OF PART EDGE BLEND 0.750'. WIDTH OF DAMAGE REMOVED FROM BLENDED EDGE 0.375';[03] ACCOMPLISHED PERMANANT REPAIR PER. 25-157-01651 (N489WN - SWA - MINOR ACTION - CORROSION LH WING LEADING EDGE STRAKELET BOX ASSY - STUB FITTING REPAIR) [TTG8Q013AG6R;[04] INSPECTION VERIFIED CORRECTIVE ACTION TAKEN IN STEPS 1 THRU 3.

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