# SDR AALA202607287278

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 25, 2026
- Submitted: July 28, 2026
- Operation: Air carrier
- Aircraft: [N730US](https://openairdocs.org/aircraft/N730US), registered now
- Make and model: Airbus A319-112
- Registry model: [Airbus A319-112](https://openairdocs.org/model/airbus-industrie-a319-112) (OpenAirDocs)
- Aircraft serial: 1182
- Aircraft time: 69,122 hours, 41,067 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Valve
- Part number: 746A000006
- Part serial: 0746A00LI004182
- Condition: Fault Message
- Location: Zone 100
- Part time: 51,358 hours, 20,934 cycles
- Stage of operation: CL
- How discovered: O
- Nature of condition: O
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202607287278

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED AND THE AIRCRAFT RETURNED TO PHX DUE TO THE FLIGHT CREW REPORTING AT 14K PACK OUTPUT WAS AROUND 10C IN ALL ZONES AND CABIN TEMPS WERE 95-100 DEGREES. FLIGHT DECK HAD ZERO AIRFLOW FELT LIKE 120 DEGREES AND SUFFOCATING. CABIN WAS DESCRIBED AS EXTREMELY COLD WITH ICE PARTICLES FALLING AND SOUNDED LIKE A WINDOW WAS OPEN. THE AIRCRAFT LANDED SAFELY AT PHX WITHOUT FURTHER INCIDENT. MAINTENANCE REPLACED TRIM AIR PRESSURE VALVE 14HK PER AMM 21-63-52 AND ACCOMPLISHED A SATISFACTORY LEAK / OPERATIONAL CHECK WITH NO FAULTS NOTED.

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