SDR 0102149942

Service difficulty report · Control Valve · Doug DC932

Difficulty date: June 13, 2001
Submitted: June 22, 2001
Operation: Air carrier
Aircraft: N3991C
Make and model: Doug DC932
Aircraft serial: 47175
Aircraft time: 80,610 hours, 81,184 cycles
System (JASC): 2130 · Cabin Pressure Control System
Part: Control Valve
Part number: 39613011
Part serial: 02112
Condition: Failed
Location: A/C Bay
Part time: 54,582 hours
Stage of operation: CR
How discovered: O
Nature of condition: J
Precautionary procedure: G, B

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

What was found

AIRCRAFT LOST PRESSURIZATION AT 35,000 FT. MASKS DEPLOYED AND AIRCRAFT INITIATED AN EMERGENCY DESCENT, DIVERTED TO GFK, AND LANDED WITHOUT INCIDENT. REPLACED THE FLOW CONTROL VALVE, PRESSURE REGULATOR VALVE, AND PILOT PRESSURE REGULATOR. OPERATIONAL CHECK GOOD.

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