Europa-List: PROP CONTROL

[ROBERT LINDSAY <rlindsa2@san.rr.com>]

I have a Czech made (Woodward type) governor which works fine in the air 
controlling my C/S Whirlwind prop on a Rotax 914 (almost 600 hrs).  But 
recently I have not been able to get an rpm drop during a pre-TO check 
at 4000 rpm.  Oil is clean and warm.  Even a post flight check results 
in no rpm drop when cockpit control is fully retarded.
    Any ideas before I start de-cowl and disassemble?