What was found
ON APU START, A FAULT LIGHT ILLUMINATED. APU ECU INOPERATIVE. ACFT GROUNDED. ACCOMPLISHED APU BITE IAW TASK 49-60, TASK 801. LOGGED ECU FAILED. REMOVED AND REPLACED THE APU ECU IAW AMM 49-61-12 . GROUND VERIFICATION CHECKED OK.
- Difficulty date
- May 17, 2017
- Submitted
- May 19, 2017
- Operation
- Air carrier
- Aircraft
- N477AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 40716
- Aircraft time
- 7,552 hours, 2,484 cycles
- System (JASC)
- 4960 · APU Controls
- Part
- Ecu
- Part number
- 707208601
- Part serial
- 6505150201379
- Condition
- Failed
- Location
- Apu
- Part time
- 7,541 hours, 2,481 cycles
- Stage of operation
- NR
- How discovered
- 9
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.