# SDR CALA2025021302311

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: February 12, 2025
- Submitted: February 13, 2025
- Operation: Air carrier
- Aircraft: [N844UA](https://openairdocs.org/aircraft/N844UA), registered now
- Make and model: Airbus A319-131
- Registry model: [Airbus A319-131](https://openairdocs.org/model/airbus-industrie-a319-131) (OpenAirDocs)
- Aircraft serial: 1581
- Aircraft time: 71,187 hours, 31,754 cycles
- System (JASC): [2160 · Cabin Temperature Control System](https://openairdocs.org/jasc/2160)
- Part: Filter
- Part number: WF344855
- Condition: Faulted
- Location: Zone 200
- Stage of operation: CL
- How discovered: O
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/CALA2025021302311

## Discrepancy

HOT AIR FAULT TURNED OFF HOT AIR PER ECAM POST FLIGHT REPORT FAULTED TRIM AIR PRESS VALVE FAILURE, PER TSM TASK 21-63-00-810-805-A STEP 4A (1) REPLACED TRIM AIR PRESSURE-REGULATING VALVE FILTER (REF. AMM 21-63-00-920-001). PERFORMED OPS CHECK TEST OF CAB TEMP CONTROL SYSTEM WITH NO FAULTS. RAN PACKS FOR A COUPLE HOURS WITH NORMAL OPERATION AT THIS TIME. NO OTHER FAULTS NOTED. OK FOR SERVICE. PARTS USED:  18-2151-3-0009,QTY :1

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