# SDR AALA2019031859002

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: March 14, 2019
- Submitted: March 18, 2019
- Operation: Air carrier
- Aircraft: [N9618A](https://openairdocs.org/aircraft/N9618A), registered now
- Make and model: Doug MD 83
- Registry model: [Doug MD 83](https://openairdocs.org/model/mcdonnell-douglas-md-83) (OpenAirDocs)
- Aircraft serial: 53565
- Aircraft time: 59,256 hours, 29,686 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Actuator
- Part number: 20219742
- Part serial: 116710
- Condition: Faulty
- Location: Outflow Valve
- Stage of operation: NR
- How discovered: V
- Nature of condition: O
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA2019031859002

## Discrepancy

THE PILOT REPORTED THAT THE AUTO 1 PRESSURE CONTROLLER WAS INOPERATIVE,  LIGHT ILLUMINATED, PRESSURIZATION SYSTEM FAILED.  THE AIRCRAFT WAS GROUNDED.  MAINTENANCE PERFORMED A BITE TEST, AND FOUND THE NR 1 CONTROLLER HAD FAULTED.  DETERMINED THAT IT WAS THE MOTOR.  REMOVED AND REPLACED THE OUTFLOW VALVE ACTUATOR AND VALVE NOZZLE IAW AMM 21-35-05. OPS CHECKED GOOD.

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