TT Aileron servo question - Andrew?

[Tankerpilot75]

I’ve got the TruTrac Vizion 385 autopilot in my aircraft and for the second time I’ve noticed my heading drifting unexpectedly. I moved the stick left and right and there wasn’t any resistance however there was resistance and control in pitch. Recycled the A/P engagement several times and after the third recycling it appeared to regain heading/aileron control with left right stick resistance.

Question: does this sound like an aileron servo issue or a control head problem? Any ideas on how to better identify/isolate the problem?

Andrew please chime in!

 

[TruTrakAndrew]

Hmmmm, usually when a servo or controller gives up it doesn't come back.

How old is the roll servo? some VERY early servos could overheat and quit when run at 28V, but I doubt that is the case here.

Check the connector at both ends, make sure it's not partially seated or has a broken wire or something that could make intermittent connection.

email me directly if you wish...happy to help!

 

[BobTurner]

Always check easy things first. Check that the shear pin has't sheared. Sometimes the break is uneven and the pin can actually sort of re-engage as if it was okay (but a strong left-right on the stick will unstick a broken pin).