# SDR AALA202407221663

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 17, 2024
- Submitted: July 22, 2024
- Operation: Air carrier
- Aircraft: [N110AN](https://openairdocs.org/aircraft/N110AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 5975
- Aircraft time: 35,598 hours, 7,240 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil Cooler
- Part number: 1604941
- Part serial: 1686
- Condition: Leaking
- Location: Apu
- Part time: 42,344 hours, 22,060 cycles
- Component: Apu, Hnywl, 1319A
- Component part number: 38007081
- Stage of operation: NR
- How discovered: O
- Nature of condition: B
- Precautionary procedure: O
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202407221663

## Discrepancy

AIRCRAFT WAS GROUNDED: FLIGHT CREW REPORTED WEIRD SMELL THROUGHOUT THE CABIN. MAINTENANCE FOUND THE APU LEAKING OIL FROM THE APU OIL COOLING FAN AND THE APU OIL COOLER. MAINTENANCE REPLACED THE THE APU OIL COOLER PER AMM 49-91-44 (AALA202407221663) AND THE APU OIL COOLING FAN PER AMM 49-52-51. (AALA202407226528). A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.

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