# SDR ASAA2023071043977

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 10, 2023
- Submitted: July 12, 2023
- Operation: Air carrier
- Aircraft: [N478AS](https://openairdocs.org/aircraft/N478AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 44105
- Aircraft time: 29,544 hours, 9,309 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Unknown
- Part number: UNKNOWN
- Condition: Unknown
- Location: Unknown
- Stage of operation: NR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2023071043977

## Discrepancy

APU MAINT LIGHT ILLUMINATES INTERMITENTLY. GROUNDED - YES. PERFORMED APU BITE TEST PER FIM 49-60 TASK 801 NO FAULT FOUND APU MAINT LIGHT IS OFF SEAMC DAN NOTIFIED.

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