# SDR AALA202511057295

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: November 2, 2025
- Submitted: November 5, 2025
- Operation: Air carrier
- Aircraft: [N916US](https://openairdocs.org/aircraft/N916US), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6420
- Aircraft time: 35,013 hours, 14,337 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Oil System
- Condition: Leaking
- Location: Apu
- Component: Apu, Hnywl
- Component part number: 38007081
- Stage of operation: CL
- How discovered: O
- Nature of condition: K, B
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202511057295

## Discrepancy

AIRCRAFT WAS GROUNDED: THE AIRCRAFT DIVERTED TO MIA DUE TO THE FLIGHT CREW REPORTING A DIRTY SOCK SMELL AT THE GATE, TAXI OUT AND TAKEOFF. AT FL 240 FLIGHT CREW SECURED PACK 2 PER QRH MISC PROCEDURE, THE SMELL DISSIPATED AND WAS MILD. THE AIRCRAFT LANDED SAFELY AT MIA WITHOUT FURTHER INCIIDENT. MAINTENANCE FOUND OIL LEAKING FROM THE APU V BAND AREA AND REPLACED THE APU PER TASK CARD 26L31049003. A SATISFACTORY LEAK / OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.

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