SDR USAAD97071

Service difficulty report · Outflow Valve · Doug DC931

Difficulty date: April 22, 1997
Submitted: March 26, 2000
Operation: Air carrier
Aircraft: N986VJ
Make and model: Doug DC931
Aircraft serial: 47209
System (JASC): 2133 · Pressure Regulator/Outflow Valve
Part: Outflow Valve
Part number: 54447222
Condition: Failed
Location: Cabin
Stage of operation: CR
Nature of condition: J
Precautionary procedure: B, A

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

What was found

CLT/DTW - FLT 998 - WHILE AT CRUISE, CABIN ALTITUDE (RED ANNUNCIATOR) LIGHT ILLUMINATED. ACCOMPLISHED EMERGENCY DESCENT. WHILE DESCENDING, RETAINED CONTROL OF CABIN ALTITUDE IN MANUAL. ON APPROACH, CABIN PRESSURE WAS LOST AT 2,500 FEET AGL. DIVERTED TO PIT. REPLACED OUTFLOW VALVE ACTUATOR. (X)

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