What was found
DURING START ATTEMPT OF APU, THE FAULT LIGHT ILLUMINATED. GROUNDED - YES. REMOVED AND REPLACED IGNITION EXCITER BOX AND IGNITER PLUG LEAD ON APU WITH REF B737-900 AMM 49-41-31, AND AMM 49-41-52.
- Difficulty date
- March 15, 2023
- Submitted
- March 20, 2023
- Operation
- Air carrier
- Aircraft
- N469AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41702
- Aircraft time
- 32,328 hours, 10,274 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Exciter
- Part number
- 38880585
- Part serial
- J19410627
- Condition
- Faulty
- Location
- Apu
- Part time
- 3,573 hours, 4,708 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.