As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT PITCH CONTROL IS ERRATIC IN CLIMB AND TURNS JERKS CONTROL YOKE BACK AND FORTH. FOUND JAMMED LINKAGE ABOVE SERVO MICRO-SWITCH. REMOVED AND PROPERLY REPOSITIONED LINKAGE. CLEANED CONNECTOR TO MICROSWITCH AND SERVO. OPS CK''D OK IAW MM 22-20-0.