SDR SWAA2026021269501

Service difficulty report · Winglet · Boeing 7377H4

Difficulty date: February 10, 2026
Submitted: February 12, 2026
Operation: Air carrier
Aircraft: N903WN
Make and model: Boeing 7377H4
Aircraft serial: 32457
Aircraft time: 58,622 hours, 35,557 cycles
System (JASC): 5730 · Wing, Plate/Skin
Part: Winglet
Condition: Delaminated
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

BULGE FOUND ON LT WINGLET, BLENDED THE WINGLET SKIN DELAMINATION, 36 INCHES FROM TOP EDGE AND 6 INCHES FROM L/E, MEASURES 12 IN X 4 IN; PROTRUDING 0.031 INCH. LOCATED IN HONEYCOMB SKIN PANEL ZONE 3, EXCEEDS ALLOWABLE DELAMINATION LIMITS IAW AP37.1-0632, SRM 57-30-01, & C/W EA 26-157-00396.

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