msrf Posted April 11, 2011 Share Posted April 11, 2011 During aircraft decent (landing)rpm fluctuate 99%-102%.normal flight rpm no fluctuate.td valve null,propeller mec gov position also fluctuate.tit,fuel flow,torque normal. Anyone can give solution. Quote Link to comment Share on other sites More sharing options...
Lkuest Posted April 11, 2011 Share Posted April 11, 2011 I'd start with the NTS gap and the gap in the torque retainer lug on the back of the pump housing. Quote Link to comment Share on other sites More sharing options...
pjvr99 Posted April 11, 2011 Share Posted April 11, 2011 During aircraft decent (landing)rpm fluctuate 99%-102%.normal flight rpm no fluctuate.td valve null,propeller mec gov position also fluctuate.tit,fuel flow,torque normal. Anyone can give solution. I'd hazzard a guess and go with NTS'ing. However, you're at flight idle/low pitch stop, so rpm will be below 100% (out of prop governing). Alternately, if there is no other indication, it may just be a bad tach generator .... Quote Link to comment Share on other sites More sharing options...
NATOPS1 Posted April 11, 2011 Share Posted April 11, 2011 Is your generator frequency moving as well? Quote Link to comment Share on other sites More sharing options...
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