# SDR AALA202201187782

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 13, 2022
- Submitted: January 18, 2022
- Operation: Air carrier
- Aircraft: [N105UW](https://openairdocs.org/aircraft/N105UW), registered now
- Make and model: Airbus A320-214
- Registry model: [Airbus A320-214](https://openairdocs.org/model/airbus-a320-214) (OpenAirDocs)
- Aircraft serial: 868
- Aircraft time: 60,090 hours, 34,629 cycles
- Engine time: 18,288 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: O-Ring
- Condition: Leaking
- Location: Apu Oil Cooler
- Component: Apu, Hnywl, 1319A
- Component part number: 38007081
- Stage of operation: CL
- 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/AALA202201187782

## Discrepancy

AIRCRAFT WAS GROUNDED: ON CLIMB AND DESCENT WHEN GOING THROUGH MOISTURE THERE WAS A MUSTY SMELL THROUGHOUT THE CABIN. MAINTENANCE IDENTIFIED AIR OIL COOLER TUBE LEAKING OIL.  REPLACED APU OIL COOLING FAN O-RING AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK PER AMM 49-52-51.

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