SDR CALA2025122412435

Service difficulty report · Bulkhead · Boeing 737824

Difficulty date: December 15, 2025
Submitted: December 24, 2025
Operation: Air carrier
Aircraft: N14242
Make and model: Boeing 737824
Aircraft serial: 28805
Aircraft time: 79,081 hours, 29,500 cycles
System (JASC): 5312 · Fuselage Main, Bulkhead
Part: Bulkhead
Part number: 148A24412
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

APU AIR INLET PLENUM TRANSITION DUCT MATING SURFACE AT APU BAY BULKHEAD WAS CORRODED. ACCOMPLISHED A REPAIR AT APU AIR INLET PLENUM DUCT BULKHEAD AT BS 1088 IAW SRM 51-40-02-0G-0, ESR 29-13201, REV P1, DWG 148A0924, DWG 148A1684, AND DWG 148A3800.