# SDR AALA202206284402

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: June 26, 2022
- Submitted: June 28, 2022
- Operation: Air carrier
- Aircraft: [N872NN](https://openairdocs.org/aircraft/N872NN), registered now
- Make and model: Boeing 737
- Aircraft serial: 33219
- Aircraft time: 32,277 hours, 13,458 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Switch
- Part number: 38762552
- Condition: Unserviceable
- Location: Zone 300 - Stabs
- Stage of operation: CR
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202206284402

## Discrepancy

AIRCRAFT WAS GROUNDED: IN CRUISE THE APU LOW OIL PRESSURE LIGHT ILLUMINATED, AND APU AUTO SHUTDOWN OCCURRED. FLIGHT DIVERTED BACK TO MSP, LANDING SAFELY. REPLACED APU OIL PRESSURE SWITCH PER AMM 49-94-22. SERVICED APU PER AMM 12-13-31. ACCOMPLISHED SATISFACTORY OPERATIONAL CHECK.

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