# SDR SCNA20200721049

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 18, 2020
- Submitted: July 21, 2020
- Operation: Air carrier
- Aircraft: [N5693A](https://openairdocs.org/aircraft/N5693A), registered now
- Make and model: Boeing 737-8
- Registry model: [Boeing 737-8](https://openairdocs.org/model/boeing-737-8) (OpenAirDocs)
- Aircraft serial: 29947
- Aircraft time: 62,807 hours, 33,222 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Pressure Switch
- Condition: Malfunctioned
- Location: Apu Oil Pressure
- Stage of operation: CL
- 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/SCNA20200721049

## Discrepancy

DURING CLIMB OUT FROM MSP APU LOW OIL PRESSURE LIGHT ILLUMINATED FOLLOWED BY #2 SOURCE OFF LIGHT ILLUMINATING.   DECLARED AN EMERGENCY- AIR RETURN. REMOVED AND REPLACED APU LOW OIL PRESSURE SWITCH IAW AMM 49-94-22.  DPI INDICATOR INSPECTED, OIL LEVEL FULL.  OK FOR SERVICE.

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