# SDR AALA202104049005

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: April 2, 2021
- Submitted: April 6, 2021
- Operation: Air carrier
- Aircraft: [N914UY](https://openairdocs.org/aircraft/N914UY), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6337
- Aircraft time: 21,055 hours, 8,187 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Pressure Switch
- Condition: Inoperative
- Location: Apu Oil
- Stage of operation: NR
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202104049005

## Discrepancy

AIRCRAFT WAS GROUNDED: APU AUTO SHUTDOWN AT FL 310 WITH ONE GENERATOR ALREADY PLACARDED; FLIGHT DECLARED EMERGENCY, RETURNED TO FIELD, AND LANDED WITHOUT FURTHER INCIDENT. REPLACED LOW OIL PRESSURE SWITCH WITH NEW IAW AMM 49-94-14, OPS CHECK GOOD.

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