SDR DALA2025122209325

Service difficulty report · Transition Panel · Boeing 757251

Difficulty date: December 21, 2025
Submitted: December 22, 2025
Operation: Air carrier
Aircraft: N555NW
Make and model: Boeing 757251
Aircraft serial: 33391
Aircraft time: 63,261 hours, 28,684 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Transition Panel
Condition: Corroded
Location: Zone 100
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

FLC LEFT SIDE TRANSITION PANEL, BS 500 - 640, UNDERSIDE OF PANEL CORROSION NOTED UNDER NUTPLATES WITH 20 OR MORE MOUNTED ON BARE METAL WITH POSSIBLE CORROSION UNDER THEM. REMOVED CORROSION FROM UNDER NUTPLATES AT 20 LOCATIONS, FOUND TO BE OUT OF LIMITS IAW SRM 53-00-53- 1A-1. REMOVED, AND INSTALLED A NEW TRANSITION PANEL. (1362547)