# SDR YENA20110517254

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: May 17, 2011
- Submitted: May 18, 2011
- Operation: Air carrier
- Aircraft: [N535JB](https://openairdocs.org/aircraft/N535JB), registered now
- Make and model: Airbus A320-232
- Registry model: [Airbus A320-232](https://openairdocs.org/model/airbus-a320-232) (OpenAirDocs)
- Aircraft serial: 1739
- Aircraft time: 36,458 hours, 13,135 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 1303A000004
- Part serial: 130303652
- Condition: Failed
- Location: Nr 2
- Part time: 22,213 hours, 7,865 cycles
- Stage of operation: CR
- How discovered: O
- Nature of condition: O
- Precautionary procedure: B
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/YENA20110517254

## Discrepancy

FLT 180 PHX-JFK, CREW QUICKLY DONNED OXYGEN MASKS AND REQUESTED AN EXPEDITED DESCENT DUE TO PRESSURIZATION PROBLEMS.  CABIN V/S FLUX BETWEEN +- 1700 FT/MIN ABOVE FL 300.  BOTH PACK FLOWS WERE HIGH WITH RIGHT PACK FLUX BETWEEN HIGH AND LOW SLOWLY BLEED PSI AND OTHER INDICATIONS NORMAL.  REMOVED AND REPLACED NR 2 PACK FLOW CONTROL VALVE IAW MM 21-51-51.  OPS AND LEAK CHECK OK.

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