What was found
FAULT LIGHT ILLUMINATED WHEN WE TRY TO START APU. ACFT GROUNDED. REPLACED APU IGN UNIT REF AMM TASK 49-41-31/401. RAN APU 3 TIMES NO FAULTS NOTED.
- Difficulty date
- December 6, 2013
- Submitted
- December 9, 2013
- Operation
- Air carrier
- Aircraft
- N402AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41189
- Aircraft time
- 4,401 hours, 1,409 cycles
- Engine
- Cfmint CFM567B27
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Exciter
- Part number
- 38880587
- Part serial
- 120936
- Condition
- Failed
- Location
- Apu
- Part time
- 1,024 hours, 2,038 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.