# SDR AALA201802129051

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 9, 2018
- Submitted: February 13, 2018
- Operation: Air carrier
- Aircraft: [N553UW](https://openairdocs.org/aircraft/N553UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 4960
- Aircraft time: 21,842 hours, 8,082 cycles
- System (JASC): [4900 · Airborne Auxiliary Power Unit (APU) System](https://openairdocs.org/jasc/4900)
- Part: Sensor
- Condition: Leaking
- Location: Apu Pressure
- Stage of operation: NR
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201802129051

## Discrepancy

FLIGHT ATTENDANTS REPORT ELECTRICAL/DIRTY SOCK SMELL ON DESCENT. APU OFF SMELL IN FORWARD GALLEY AND 3 L/R POSITIONS.  THE AIRCRAFT WAS GROUNDED.  APU OIL TEMPERATURE SENSOR REPLACED IAW AMM 49-94-15. NO ODOR NOTED AFTER APU AND ENGINE RUN.

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