What was found
APU NO START. NO MESSAGES FOUND ON BOX. STARTED FIRST TIME AND SEVERAL MORE TIMES, COULD NO DUPLICATE ON GROUND. FOUND NO FAULTS ON ECU & FIRST ATTEMPT FAILED, REPLACED ECU PER MM.
- Difficulty date
- October 12, 2011
- Submitted
- October 21, 2011
- Operation
- Air carrier
- Aircraft
- N551UA
- Make and model
- Boeing 757222
- Aircraft serial
- 25399
- Aircraft time
- 75,734 hours, 21,931 cycles
- Engine
- Pwa PW2037
- System (JASC)
- 4920 · APU Core Engine
- Part
- Ecu
- Part number
- 21734220
- Part serial
- 160
- Condition
- Unknown
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.