What was found
APU START FAULT DURING START. GROUNDED - YES. REPLACED THE APU IGNITION UNIT, APU STARTS AND OPERATES NORMALLY, REF B737-900 AMM 49-41-31-000-801.
- Difficulty date
- August 27, 2022
- Submitted
- August 31, 2022
- Operation
- Air carrier
- Aircraft
- N442AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43293
- Aircraft time
- 32,825 hours, 10,386 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Ignition Unit
- Part number
- 38880587
- Part serial
- 131522
- Condition
- Faulty
- Location
- Apu
- Part time
- 3,218 hours, 5,321 cycles
- Stage of operation
- NR
- How discovered
- V
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.