What was found
CSS START ATTEMPT FAILED AT FL400. FAULT LIGHT ILLUMINATED QRH COMPLIED WITH NO OTHER ATTEMPT. GROUNDED - YES. ON DEFERRAL.
- Difficulty date
- May 19, 2020
- Submitted
- May 27, 2020
- Operation
- Air carrier
- Aircraft
- N487AS
- Make and model
- Boeing 737990ER
- Aircraft serial
- 44108
- Aircraft time
- 17,998 hours, 5,617 cycles
- System (JASC)
- 4900 · Airborne Auxiliary Power Unit (APU) System
- Part
- Unknown
- Condition
- Malfunctioned
- Location
- Apu
- Stage of operation
- NR
- How discovered
- O
- Nature of condition
- J
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.