Service difficulty report · Outflow Valve · Cessna 550

Difficulty date
November 14, 2008
Submitted
November 24, 2008
Operation
Air carrier
Aircraft
N304CS
Make and model
Cessna 550
Aircraft serial
5500847
Aircraft time
6,862 hours, 5,252 cycles
Part
Outflow Valve
Condition
Malfunctioned
Location
Cabin Pressure
Stage of operation
CR
How discovered
O
Nature of condition
J
Precautionary procedure
B

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

What was found

AT FL 370 CABIN STARTED TO CLIMB AT 2000 FPM. CREW DECLARED AND EMERGENCY AND DIVERTED TO KBUR. PRESSURIZATION SYSTEM WAS DIFFERED PER MEL AND AIRCRAFT REPOSITIONED TO KLGB (CITATION SERVICE CENTER) FOR PRESSURIZATION MEL MAINTENANCE. FOUND HARDWARE CONNECTING AIR LINES TO OUTFLOW VALVE STRIPPED. REPLACED ASSOCIATED HARDWARE, PRESSURE, LEAK AND OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.

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