SDR 0401919621

Service difficulty report · Relief Valve · Doug DC932

Difficulty date
October 19, 2004
Submitted
October 25, 2004
Operation
Air carrier
Aircraft
N621NW
Make and model
Doug DC932
Aircraft serial
47544
Aircraft time
63,537 hours, 73,066 cycles
Part
Relief Valve
Part number
39181655501
Condition
Malfunctioned
Location
Elevator
Stage of operation
CL
How discovered
O
Nature of condition
F
Precautionary procedure
O

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

What was found

CREW REPORTED ELEVATOR BINDING AT THE HALFWAY POINT OF DEFLECTION. THIS OCCURRED DURING TAKEOFF ROTATION, CLIMB, AND LANDING. MAINTENANCE ADJUSTED A FAIRING FOR THE UPPER CONTROL TAB ARM TO RELIEVE PRESSURE ON UPPER ELEVATOR SKIN FOR CLEARANCE OF LEADING EDGE OF CONTROL TAB. FUNCTION CHECK WAS GOOD BUT PROBLEM RE-OCCURRED DURING PREFLIGHT FOR DEPARTURE. MAINTENANCE REPLACED THE POWER RETURN RELIEF VALVE AND THE ELEVATOR LOAD FEEL AND CENTERING MECHANISM.

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