What was found
APU FAULT LIGHT ON DURING START. DID NOT EXTINGUISH. ACFT GROUNDED. REPLACED APU IGNITION UNIT IAW AMM 49-41-31-400-801. OPS CHECKED GOOD.
- Difficulty date
- April 26, 2017
- Submitted
- April 28, 2017
- Operation
- Air carrier
- Aircraft
- N442AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 43293
- Aircraft time
- 13,634 hours, 4,474 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Exciter
- Part number
- 38880587
- Part serial
- 100482
- Condition
- Failed
- Location
- Apu
- Part time
- 6,317 hours, 10,164 cycles
- 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.