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400A Autopilot--
The 400A is a very good autopilot, but like everything requires some TLC.
The problem with the turn control is the micro- switch that needs adjusting so that it goes into the recess on the cam attached to the turn control.
Your ALT hold problem is either the Autotrim is not working or the pitch servo is not working.
Does the A/P pitch sync ok when switched (ie does the white pitch wheel run and then stop and the pitch should eng ).
The ALT hold should work from a climb or descent, as long as the autotrim and pitch servos are servicable.
Spares units are avialable from Airwich Avionics, at Wichita.
Let me know if you need any help.
Pete Somers
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