# SDR AALA202510026255

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 1, 2025
- Submitted: October 2, 2025
- Operation: Air carrier
- Aircraft: [N587UW](https://openairdocs.org/aircraft/N587UW), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6236
- Aircraft time: 35,453 hours, 14,699 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Cooling Fan
- Part serial: 1960
- Condition: Leaking
- Location: Apu
- Part time: 24,186 hours, 10,560 cycles
- Component: Apu, Hnywl, 1319A
- Component part number: 38007081
- Stage of operation: DE
- 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/AALA202510026255

## Discrepancy

AIRCRAFT WAS GROUNDED: SLIGHT DIRTY SOCK ODOR NOTICED DURING TAXI OUT. ODOR DISSIPATED ENROUTE, HOWEVER RETURNED DURING THE DESCENT. VERY STRONG ODOR IN DESCENT CAUSING IRRITATION. MAINTENANCE FOUNDAPU COOLING FAN ASSEMBLY LEAKING OIL

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