What was found
APU OVERSPEED LIGHT ILLUMINATED, APU RUNNING FOR AT LEAST 4 MINUTES. GROUNDED - YES. PERFORMED APU BITE CHECK REF FIM TASK 49-60-00-810-801 FOUND OVERSPEED FAULT TO BE AN INTERMITTENT FAULT. APU GROUND VERIFICATION CHECKS NORMAL.
- Difficulty date
- July 28, 2018
- Submitted
- July 31, 2018
- Operation
- Air carrier
- Aircraft
- N586AS
- Make and model
- Boeing 737890
- Aircraft serial
- 35189
- Aircraft time
- 41,134 hours, 12,548 cycles
- System (JASC)
- 4970 · APU Indicating System
- Part
- Warning System
- Condition
- False Activation
- Location
- Cockpit
- Stage of operation
- TX
- How discovered
- O
- Nature of condition
- N
- Precautionary procedure
- K
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.