KAP 200 disengage causes

[preinke]

KAP 200 engaging has become unreliable. All the servos have been overhauled fairly recently . When it does engage it operates the roll and pitch servos but will sometimes disengage when Alt mode is selected. Disconnected the pitch servo and that seems to fix the latching problem. I will send the pitch servo off to Aerolab but would like to understand the latch circuit and disengage causes ( ie yoke trim switch ) What in the pitch servo could cause this ?  Current draw ,trim switches , or short ? Garmin get going on the AP STC !

Paul '77J KIKV

[Oldguy]

Might be worth a quick call to Autopilots Central in Tulsa to see what their thoughts are. They seem to be the go-to folks for King A/P problems.

[LANCECASPER]

Central Texas Avionics in Georgetown TX and Sarasota Avionics in FL are also excellent on King.

[preinke]

Does anyone have schematic of the latch circuit in the KC 295 ? There is  mention of the switch plate maybe being the culprit as it maybe isn't kept captive by the plastic on back of the switch. It seems more abrupt when it unlatches  so I think it is a break in the circuit.