roll servo location in Aztec

Wondering if anybody knows the normal location of the roll servo for an
S-Tec autopilot in an Aztec. We're having some roll oscillation problems
and we'd like to examine the electrical connections and the motor brushes if
possible.

Thanks
Jim

Roll servo is likely under your left foot, but can be elsewhere... Had
a newly installed S-Tec 50 in an Aztec that had all kinds of teething
problems with oscillations... Finally solved after months of struggle
when S-Tec physically changed out the components on the amplifier
board... My suggestion is to take it back to the installer or to a
radio shop that is familiar with S-tecs...

Denny

Looking at the Piper parts manual, it looks like they put them either under
the pilots side cabin floor, co-pilots cabin floor, or the right engine
nacelle. I'll turn it on and give a listen. Right now everything is
pointing to the brushes being glazed over, from what I can find in the logs
the roll servo hasn't been touched since it was installed 9 years ago and
S-Tec recommends cleaning up the brushes every 3-4 years to prevent roll
oscillations due to a higher required starting voltage.
Thanks
Jim

Mine was located in the right engine nacelle, I believe in the area
behind the firewall.


Jim Burns wrote:
Looking at the Piper parts manual, it looks like they put them either under
the pilots side cabin floor, co-pilots cabin floor, or the right engine
nacelle. I'll turn it on and give a listen. Right now everything is
pointing to the brushes being glazed over, from what I can find in the logs
the roll servo hasn't been touched since it was installed 9 years ago and
S-Tec recommends cleaning up the brushes every 3-4 years to prevent roll
oscillations due to a higher required starting voltage.
Thanks
Jim

Which Aztec model? year? and autopilot?
thanks
Jim