# SDR AALA20100821DFW02

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: August 20, 2010
- Submitted: August 23, 2010
- Operation: Air carrier
- Aircraft: [N972TW](https://openairdocs.org/aircraft/N972TW), registered now
- Make and model: Doug DC-9-83
- Registry model: [Doug DC-9-83](https://openairdocs.org/model/douglas-dc-9-83) (OpenAirDocs)
- Aircraft serial: 53622
- Aircraft time: 32,030 hours, 15,072 cycles
- System (JASC): [2131 · Cabin Pressure Controller](https://openairdocs.org/jasc/2131)
- Part: Controller
- Part number: 21184904
- Part serial: 109311
- Condition: Failed
- Location: Cabin Pressure
- 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/AALA20100821DFW02

## Discrepancy

DFW - ON CLIMBOUT AUTO PRESSURIZATION CONTROLLER NUMBER 2 FAILED.  NUMBER 1 CONTROLLER ON PLACARD.  FLIGHT RETURNED DFW LANDED WITHOUT INCIDENT.  AIRCRAFT REMOVED FROM SERVICE.  REPLACED THE NUMBER 1 CONTROLLER DUE TO VALVE MOTOR FAULT NOT CLEARING.  SYSTEM GROUND CHECKED NORMAL OPERATION.

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