Service difficulty report · Nut · Diamon DA20C1

Difficulty date
February 1, 2013
Submitted
February 1, 2013
Operation
General aviation
Aircraft
N919DA
Make and model
Diamon DA20C1
Aircraft serial
C0393
Aircraft time
3,950 hours
Engine
Cont IO240B
Engine time
1,981 hours
Propeller
Snsnch W69EK63
Part
Nut
Condition
Backed Out
Location
Shutoff Valve
Part time
3,950 hours
Component
Shutoff Valve
Component part number
171N14
Stage of operation
IN
How discovered
V
Nature of condition
K
Precautionary procedure
K

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

What was found

DURING A MFG 1000 HR INSPECTION, THE EMERGENCY FUEL SHUTOFF ARM WAS REMOVED TO INSPECT A VALVE KNOWN TO LOOSEN UP AND PRODUCE LEAKS. THE JAM NUT WAS LESS THAN FINGER TIGHT. THERE WAS NO LOCTITE OR SELF-LOCKING MECHANISM APPARENTLY BY DESIGN. THE NUT WAS REMOVED, SHAFT CLEANED, AND REASSEMBLED WITH LOCTITE BLUE.

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