# SDR CALA2025022602474

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 24, 2025
- Submitted: February 26, 2025
- Operation: Air carrier
- Aircraft: [N824UA](https://openairdocs.org/aircraft/N824UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 965
- Aircraft time: 79,643 hours, 34,517 cycles
- System (JASC): [2120 · Air Distribution System](https://openairdocs.org/jasc/2120)
- Part: Filter
- Condition: Odor
- Location: Zone 200
- Stage of operation: IN
- How discovered: 9
- Nature of condition: B
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025022602474

## Discrepancy

AIR CONDITIONING DIRTY SOCK SMELL BELOW 13000 ON DEPARTURE AND A RRIVAL NEED TO DF PACK 1 APPROVED FOR MEL 3152W CREW DID SAY THE SMELL WAS FROM PACK 1 COMPLYED WITH MEL 2152W . DUE TO PREVIOUS HISTORY NEED POSITIVE FIX, NOT JUST AN OPS CHECK *DM* UPDATED M/L WITH AIR RECIRCULATION HEPA FILTER 4012HM IN CASE NEEDED... ONLY SMELT IN COCKPIT, NO ODOR IN CABIN UNLOCKING FOR SIGN OFF ACP LEVEL ( A)  DECONTAMINATION OF ENVIRONMENT CONTROL SYSTEM PER MM21-00-00-615-802-A USING APU AND ENGINE PNEUMATICS TO SUPPLY PACKS WITH VERY FAINT SMELL WHEN #1 PACK WAS RUNNING. REPLACED RECIRC FAN FILTERS PER MM21-21-41. ACP DECONTAMINATION OF ENVIRONMENT CONTROL SYSTEM AGAIN WITH NO SMELLS NOTED.

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