What was found
APU FAULT LIGHT OCCURS WHEN PWR IS SUPPLIED VIA EITHER APU START SW OR APU TEST MODE. FOUND MAINT MSG 49-89002 NO INPUT FROM APU ECU. APU WILL NOT START. GROUNDED - YES. ON DEFERRAL.
- Difficulty date
- July 11, 2023
- Submitted
- July 17, 2023
- Operation
- Air carrier
- Aircraft
- N963AK
- Make and model
- Boeing 7379
- Aircraft serial
- 44069
- Aircraft time
- 889 hours, 281 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Unknown
- Part number
- UNKNOWN
- Condition
- Unknown
- Location
- Unknown
- 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.