What was found
APU HAS HISTORY OF CSS FAILED ON FIRST ATTEMPT. ACFT GROUNDED. ACCOMPLISHED APU BITE TEST. ACCOMPLISHED FIM TASK 49-40, TASK 801.
- Difficulty date
- January 29, 2016
- Submitted
- February 2, 2016
- Operation
- Air carrier
- Aircraft
- N409AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 41733
- Aircraft time
- 12,002 hours, 3,901 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Apu
- Condition
- Unknown
- Stage of operation
- CR
- How discovered
- 9
- Nature of condition
- O
- Precautionary procedure
- O
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.