SDR ASAA2026020364520

Service difficulty report · Transition Panel · Boeing 737990ER

Difficulty date: February 3, 2026
Submitted: February 25, 2026
Operation: Air carrier
Aircraft: N494AS
Make and model: Boeing 737990ER
Aircraft serial: 41729
Aircraft time: 8 hours, 7 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Transition Panel
Part number: 146A750236
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

AFT CARGO RT SIDEPLATE (TRANSITION PANEL) IS CORRODED MULTIPLE SPOTS STA 727-787. GROUNDED - YES. REMOVED CORROSION, DUE TO 100% MAT LASS, FOUND TO BE OUT OF LIMITS IAW B737-900ER SRM 53-00-53-1A-2, FABRICATED, LOCATED, DRILLED & INSTALLED NEW TRANSITION PANEL SIDE PLATE IAW B737-900ER SRM 53-00-53-2R-5 STEPS 4.B-LW= 2.0" O= .040 R= .000 L= 3.0" D= .040.