SDR ASAA2025110462413

Service difficulty report · Transition Panel · Boeing 737890

Difficulty date: November 4, 2025
Submitted: November 20, 2025
Operation: Air carrier
Aircraft: N557AS
Make and model: Boeing 737890
Aircraft serial: 35176
Aircraft time: 70,079 hours, 20,914 cycles
System (JASC): 5320 · Fuselage Miscellaneous Structure
Part: Transition Panel
Part number: 146A750250
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 COMPARTMENT-STA 727G-727H-RIGHT SIDEPLATE WITH CORROSION. GROUNDED - YES. REMOVED CORROSION FROM THE AFT PIT, R/H TRANSITION PANEL AT STA 727G-727H IAW B737-800 SRM 53-00-53-1A-2.2.D. ORIG THICKNESS IS .040" IAW B737-800 SRM 53-00-53-1A-2. TABLE 2. REMOVED .005" REMAINING THICKNESS IS .035" AND IS FOUND TO OUT OF LIMITS IAW B737-800 SRM 53-00-53-1A-2.4.(2). REPAIRED AFT PIT R/H TRANSITION PANEL AT STA 727F+10 TO 727H+10 USING PN:BAC1496-377 7075-T62 PO:1130861.1 IAW B737-800 SRM 53-00-53-2R-5.