# SDR AALA20091230ORD02

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: December 30, 2009
- Submitted: June 29, 2010
- Operation: Air carrier
- Aircraft: N966TW
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53616
- Aircraft time: 30,447 hours, 14,626 cycles
- System (JASC): [2150 · Cabin Cooling System](https://openairdocs.org/jasc/2150)
- Part: Control Valve
- Part number: 39613011
- Condition: Failed
- Location: Ac System
- 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/AALA20091230ORD02

## Discrepancy

CREW REPORTED UNABLE TO PRESSURIZE AIRCRAFT.  RETURNED TO ORD AND LANDED WITHOUT INCIDENT.  REPLACED LEFT AIR CONDITIONING FLOW CONTROL VALVE AND RIGHT AIR CONDITIONING PRESSURE REGULATOR SHUT OFF VALVE.

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