# SDR ASAA2022103040549

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 30, 2022
- Submitted: November 2, 2022
- Operation: Air carrier
- Aircraft: [N924AK](https://openairdocs.org/aircraft/N924AK), registered now
- Make and model: Boeing 737-9
- Registry model: [Boeing 737-9](https://openairdocs.org/model/boeing-737-9) (OpenAirDocs)
- Aircraft serial: 43333
- Aircraft time: 3,689 hours, 1,034 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Pressure Switch
- Part number: 38762552
- Condition: Faulty
- Location: Apu Oil Sys
- Stage of operation: TX
- How discovered: V
- Nature of condition: J
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/ASAA2022103040549

## Discrepancy

APU WAS STARTING AND PUT ON BUS TAXIING IN THEN AUTO SHUTDOWN. GROUNDED - YES. REMOVED AND REPLACED APU LOW OIL PRESSURE SWITCH IAW B737-9 AMM 49-94-22.

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