SDR ABXA070025

Service difficulty report · Outflow Valve · Doug DC931

Difficulty date: January 25, 2007
Submitted: January 29, 2007
Operation: Air carrier
Aircraft: N906AX
Make and model: Doug DC931
Aircraft serial: 47072
Aircraft time: 57,902 hours, 58,804 cycles
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Condition: Frozen
Location: Cabin Pressure
Stage of operation: CL
How discovered: O
Nature of condition: O
Precautionary procedure: A

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING CLIMB, CABIN WOULD NOT PRESSURIZE, DID ABNORMAL. COULD NOT PRESSURIZE MANUALLY EITHER. CABIN PRESSURE CONTROL WHEEL JAMMED. DUE TO COLD WEATHER, SUSPECT OUTFLOW VALVE FROZEN. HEATED AND LUBRICATED VALVE. PRESSURIZED AIRCRAFT ON GROUND, OPS CHECKED GOOD.

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