What was found
ATTEMPTED APU START 2X FAILED, EICAS MESSAGE "APU FAULT". PERFORMED BITE TEST ON APU ECU - FAULTED ECU. REMOVED AND REPLACED APU CONTROL UNIT. OPS CHECK OK PER AMM 49-61-05.
- Difficulty date
- May 30, 2020
- Submitted
- June 2, 2020
- Operation
- Air carrier
- Aircraft
- N640GT
- Make and model
- Boeing 7673S1
- Aircraft serial
- 25221
- Aircraft time
- 91,078 hours, 19,396 cycles
- System (JASC)
- 4960 · APU Controls
- Part
- Ecu
- Part number
- 211734220
- Part serial
- 59B0169
- Condition
- Faulty
- Location
- Apu
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.