What was found
APU FAULT LIGHT ILLUMINATED AND APU DID NOT START. GROUNDED - YES. CW B737-800 FIM 49-40 TASK 803 APU CHIP DETECTOR HAD NO METAL, BATTERY VOLTAGE IS GOOD AND APU ROTATES FREELY. STARTED APU SEVERAL TIMES WITH NO DEFECTS NOTED.
- Difficulty date
- December 14, 2021
- Submitted
- December 16, 2021
- Operation
- Air carrier
- Aircraft
- N596AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35688
- Aircraft time
- 49,197 hours, 14,636 cycles
- System (JASC)
- 4940 · APU Start/Ignition System
- Part
- Unknown
- Part number
- UNKNOWN
- Condition
- Unknown
- Location
- Unknown
- 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.