# SDR QXEA200701413

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: September 12, 2007
- Submitted: September 14, 2007
- Operation: Air carrier
- Aircraft: [N429QX](https://openairdocs.org/aircraft/N429QX), registered now
- Make and model: Bombdr DHC8402
- Aircraft serial: 4161
- Aircraft time: 674 hours, 633 cycles
- System (JASC): [2133 · Pressure Regulator/Outflow Valve](https://openairdocs.org/jasc/2133)
- Part: Outflow Valve
- Part number: 88060B010003
- Part serial: 002999
- Condition: Malfunctioned
- Location: Cabin Pressure
- Part time: 673 hours, 632 cycles
- 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/QXEA200701413

## Discrepancy

SEA FLIGHT NR 2232: AFTER TAKEOFF, THE A/C DID NOT PRESSURIZE AND CNT FAULT LIGHT ILLUMINATED.  AFTER A FEW SECONDS, FAULT LIGHT EXTINGUISHED AND A/C DID PRESSURIZE.  AIRCRAFT RETURNED TO FIELD.  MAINTENANCE REMOVED AND REPLACED FWD SAFETY VALVE, AFT OUTFLOW VALVE AND PRESSURE CONTROLLER.  C/W FUNCTIONAL TEST OF THE PRESSURIZATION CONTROL IAW Q400 AMM 21-31-00, TR 21-061, TASK 21-30-00-720-801.  OPS CHECKED GOOD IN MANUAL AND AUTO MODE.  AIRCRAFT RETURNED TO SERVICE.

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