What was found
APU FAULT LIGHT, RAN QRH AFTER LIGHT EXTINGUISHED, ATTEMPTED START, FAULT LIGHT AGAIN. ACFT GROUNDED. REPLACED THE IGNITER PLUG IAW AMM 49-41-51. REPLACED IGNITION UNIT IAW AMM 49-41-31. APU OPS CHECKED GOOD.
- Difficulty date
- September 27, 2017
- Submitted
- October 2, 2017
- Operation
- Air carrier
- Aircraft
- N433AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41704
- Aircraft time
- 15,668 hours, 5,111 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Igniter
- Part number
- 38880587
- Part serial
- 1016250400466
- Condition
- Faulted
- Location
- Apu
- Part time
- 250 hours, 477 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.