What was found
APU DID NOT START ON FIRST ATTEMPT, OVERSPEED LIGHT ILLUMINATED. GROUNDED - YES. VERIFIED NO OTHER FAULTS FOUND PER B737-900 FIM 49-30 TASK 802. SECOND START OPS NORMAL.
- Difficulty date
- December 2, 2017
- Submitted
- December 4, 2017
- Operation
- Air carrier
- Aircraft
- N491AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44109
- Aircraft time
- 8,095 hours, 2,745 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Warning Light
- Condition
- Illuminated
- Location
- Apu
- 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.