# SDR CALA2025081507803

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 15, 2025
- Submitted: August 15, 2025
- Operation: Air carrier
- Aircraft: [N454UA](https://openairdocs.org/aircraft/N454UA), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1104
- Aircraft time: 79,671 hours, 32,577 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Odor
- Location: Zone 200
- 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/CALA2025081507803

## Discrepancy

SECOND HALF OF FLT NOTICED AN ACCRID OR SMELLY GYM SOCKS WITH PACKS ON.  NO SMOKE PRESENT.  PER CREW ODOR CONTINOUS WITH APU RUNNING & IN FLIGHT DECK, REF TSM 05-50-810-831-A.  APU NEEDS INSPECTION  IAW AMM 49-00-00-200-816. NOTED BY MAINT. NO PRIOR HISTORY.  INSPECTED APU AREA IAW AMM 49-00-00-200-816.  RAN BOTH PACKS ON HIGH FOR A SIGNIFICANT PERIOD. COULD NOT DUPLICATE ANY ODOR.  SATISFIED AND AMM REF 05-51-10-200-801-C1.  R & R TWO RECIRCULATING FILTERS (4012HM , 4013HM) IAW AMM 21-21-41-400-001-A.

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