# SDR ASAA2018012223246

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 22, 2018
- Submitted: January 23, 2018
- Operation: Air carrier
- Aircraft: [N459AS](https://openairdocs.org/aircraft/N459AS), registered now
- Make and model: Boeing 737990ER
- Aircraft serial: 36352
- Aircraft time: 15,564 hours, 5,149 cycles
- System (JASC): [4970 · APU Indicating System](https://openairdocs.org/jasc/4970)
- Part: Warning System
- Condition: False Activation
- Location: Cockpit
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2018012223246

## Discrepancy

APU MAINT LIGHT CAME ON AT GATE. GROUNDED - YES. BITE SHOWS FAULT 49-91227, LOW OIL QTY. SHUTDOWN APU, VERIFIED OIL LEVEL IS FULL. DETERMINED TO BE INTERMITTENT FAULT. STARTED APU, MAINT LIGHT IS OFF.

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