# SDR AALA202603253282

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 22, 2026
- Submitted: March 25, 2026
- Operation: Air carrier
- Aircraft: [N905AU](https://openairdocs.org/aircraft/N905AU), registered now
- Make and model: Airbus A321-231
- Registry model: [Airbus A321-231](https://openairdocs.org/model/airbus-a321-231) (OpenAirDocs)
- Aircraft serial: 7700
- Aircraft time: 27,447 hours, 11,016 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Contaminated
- Location: Zone 100
- 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/AALA202603253282

## Discrepancy

AIRCRAFT WAS GROUNDED: DURING DESCENT PASSING 13,000 FT, HAD A MILD ODOR OF DIRTY SOCKS.  LASTED APPROXIMATELY 1 MINUTE. ODOR WAS CONTAINED TO THE COCKPIT AND FORWARD GALLEY. MAINTENANCE ACCOMPLISHED JOB CARD 26L00021001 SMOKE / ODOR / FUME TROUBLSHOOTING AND FOUND THE RECIRCULATION FILTERS TO BE THE SOURCE OF THE ODOR AND REPLACED THEM PER AMM 21-21-41. A SATISFACTORY OPERATIONAL CHECK WAS ACCOMPLISHED WITH NO ODORS NOTED.

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