What was found
APU FAILED TO START WITH A FAULT LIGHT. ACFT GROUNDED. ACCOMPLISHED AMM 49-40, TASK 802. REMOVED AND REPLACED THE IGNITION UNIT IAW AMM 49-41-31 AND IGNITER PLUG IAW AMM 49-41-51 OPS CHECKED GOOD.
- Difficulty date
- May 18, 2017
- Submitted
- May 22, 2017
- Operation
- Air carrier
- Aircraft
- N419AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41734
- Aircraft time
- 16,505 hours, 5,430 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Ignition Sys
- Part number
- 38880587
- Part serial
- 130062
- Condition
- Failed
- Location
- Apu
- Part time
- 4,102 hours, 8,414 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.