Service difficulty report · Vernatherm · Mooney M20K

Difficulty date
October 17, 2000
Submitted
November 9, 2000
Operation
General aviation
Aircraft
N252DX
Make and model
Mooney M20K
Aircraft serial
250580
Engine
Cont TSIO360MB
Part
Vernatherm
Part number
639305
Part serial
VD210195117844
Condition
Bent
Location
Oil Temp Valve
Part time
1,088 hours
Stage of operation
IN
How discovered
C
Nature of condition
O
Precautionary procedure
K

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

What was found

RETAINING NUT ROLL PIN TO SECURE THE NUT. THE SHAFT ON WHICH THE NUT IS INSTALLED WAS BENT JUST BEHIND THE NUT. SUBMITTER HAS SEEN SEVERAL NOW WITH THIS CONDITION AND THEY ARE ALL FROM FACTORY REMAINS OR NEW ENGINES FROM RECENT YEARS. THIS ONE REBUILT 2-8-95. THE BEND IS IN THE DIRECTION OF THE ROLL PIN. IT COULD BE CAUSED AT MANUFACTURE WHEN THE PIN IS INSTALLED. IT APPEARED THE END OF THE BRASS SHAFT WAS MACHINED. IT COULD OCCUR AT THAT TIME, IF SHAFT IS NOT SUPPORTED. SUBMITTER HAS ADVISED TCM. (X)

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