# SDR AALA201810019008

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 27, 2018
- Submitted: October 1, 2018
- Operation: Air carrier
- Aircraft: [N9628W](https://openairdocs.org/aircraft/N9628W), registered now
- Make and model: Doug MD 83
- Registry model: [Doug MD 83](https://openairdocs.org/model/mcdonnell-douglas-md-83) (OpenAirDocs)
- Aircraft serial: 53598
- Aircraft time: 55,059 hours, 27,578 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Motor
- Part number: 20220142
- Part serial: 1092719
- Condition: Defective
- Location: Nr 1 Outflow Vlv
- Stage of operation: CL
- How discovered: V
- Nature of condition: J
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA201810019008

## Discrepancy

THE AIRCRAFT WOULD NOT PRESSURIZE AFTER TAKEOFF,  A FEW MINUTES AFTER LEVELING AT 9000 FEET THE AFT GALLEY DOOR LIGHT ILLUMINATED. THE AIRCRAFT WAS GROUNDED.  PERFORMED PRESSURIZATION CONTROLLER BITE TEST, FOUND A FAULT IN OUTFLOW VALVE.  REPLACED BOTH CONTROLLERS AND THE OUTFLOW VALVE DRIVE MOTORS IAW MM 21-32-03 AND 21-32-05.

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