What was found
APU FAILS TO START - TWO ATEMPTS FAILED. GROUNDED - YES. INTERROGATED APU VIA OMF FOUND FAULT CODE MX MESSAGE 49-61144. ECU INTERNAL FAILURE. REMOVED AND REPLACED APU ECU REF B737-9 AMM 49-61-12.
- Difficulty date
- June 5, 2022
- Submitted
- June 8, 2022
- Operation
- Air carrier
- Aircraft
- N920AK
- Make and model
- Boeing 7379
- Aircraft serial
- 44086
- Aircraft time
- 2,368 hours, 717 cycles
- System (JASC)
- 4960 · APU Controls
- Part
- Ecu
- Part number
- 7072086010
- Part serial
- 6505150206147
- Condition
- Failed
- Location
- Aft Cargo Compar
- Part time
- 1,806 hours, 535 cycles
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- O
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.