As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTOPILOT PORPOISES DEFECT. FOUND WEAK SERVO, REPLACED SWITCH REPAIRED UNIT. CONTINUED MALFUNCTION WITH AUTOPILOT. LENGTHY TROUBLESHOOTING FOUND REPAIRED SERVO FAULT HAD BLOWN FUSE IN MODE SELECTOR DUE TO AP ELECTRICAL BOX FEEDBACK TO AP. ALL DEFECTIVE COMPONENTS REPLACED WHICH CORRECTED PROBLEM.