# SDR ASAA2014112209725

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 22, 2014
- Submitted: November 25, 2014
- Operation: Air carrier
- Aircraft: [N592AS](https://openairdocs.org/aircraft/N592AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 35190
- Aircraft time: 26,147 hours, 8,148 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Warning Message
- Condition: False Activation
- Location: Apu Oil
- Stage of operation: TX
- How discovered: O
- Nature of condition: N
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2014112209725

## Discrepancy

APU MAINT LIGHT ILLUMINATED AFTER APU START.  ACFT GROUNDED.  PERFORMED APU BITE AND FOUND ERROR MSG 49-91227, LOW OIL QTY. INSPECTED APU AND FOUND OIL LEVEL ON THE FULL POSITION ON SIGHT GLASS, IAW AMM 12-13-31. PERFORMED LOW OIL QTY FAULT ISOLATION REF TASK 49-90, TASK 804, APU OPS CHECKED GOOD, NO MORE FAULTS.

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