# SDR ASAA2012092392934

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 2, 2012
- Submitted: September 26, 2012
- Operation: Air carrier
- Aircraft: [N512AS](https://openairdocs.org/aircraft/N512AS), registered now
- Make and model: Boeing 737890
- Aircraft serial: 39043
- Aircraft time: 15,618 hours, 4,951 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Pressure Switch
- Part number: 38762552
- Condition: Faulty
- Location: Apu
- Part time: 20,203 hours, 30,022 cycles
- Stage of operation: TX
- How discovered: O
- Nature of condition: O
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2012092392934

## Discrepancy

AT GATE, APU SHUTDOWN ABRUPTLY FOR NO REASON.  VERIFIED DISCREPANCY. PERFORMED APU BITE.  PERFORMED FIM TASK 49-90 TASK 803. APU OIL LEVEL AND MAGNETIC DRAIN PLUG OK.  R & R APU LOW OIL PRESSURE SWITCH IAW AMM 49-94-22.  GROUND VERIFICATION SUCCESSFUL.  APU OPS NORMAL.

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