Autopilot failure modes are a bit of a mystery, but I can tell you
from first hand experience, some failure modes would be very bad
indeed. One absolutely needs to keep an eye on the gyros the autopilot
DOES NOT use and turn the autopilot off if there is disagreement.

My answers below:
john smith wrote in message ...
I am interested in learning from everyone...
a. What autopilot your aircraft is equipped with?
Century I
b. What aircraft your autopilot is installed in?
Aviat Husky
c. What does your autopilot use for heading/altitude/attitude reference?
Uses both the electric TC, and if coupled then either the GPS obs
indicator or the VOR for right and left
d. What does your autopilot use for loc/gs reference?
It uses the VOR indicator for right and left, no altitude
e. If your heading/altitude/attitude reference fails, what functions
I am not sure of this failure mode. The autopilot uses both the TC and
the GPS for it's right and left.
does you autopilot still provide?
f. With failed heading/altitude/attitude reference, does the loc/gs
still function?
Yes, it still functions