# SDR AALA202610102521

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: October 7, 2026
- Submitted: October 11, 2026
- Operation: Air carrier
- Aircraft: [N134AN](https://openairdocs.org/aircraft/N134AN), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 6495
- Aircraft time: 35,628 hours, 13,714 cycles
- System (JASC): [4990 · APU Oil System](https://openairdocs.org/jasc/4990)
- Part: Valve
- Condition: Leaking
- Location: Zone 100
- 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/AALA202610102521

## Discrepancy

AIRCRAFT WAS GROUNDED: DIRTY SOCK ODOR DURING CLIMB THEN AGAIN DURING DESCENT - MAINTENANCE FOUND THE APU OIL LUBE UNIT VALVE ASSEMBLY LEAKING OIL AND REPLACED THE O-RINGS ON THE VALVE ASSEMBLY - A DECONTAMINATION OF THE ENVIRONMENTAL CONTROL SYSTEM WAS ACCOMPLISHED PER JOB CARD 26L00021014

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