As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: WHEN EITHER AUTOPILOT A OR B IS ENGAGED THE CONTROL COLUMN AILERON CONTROL JERKS MOMENTARILY IN A LEFT ROLLING MOTION. MAINTENANCE FOUND AUTOPILOT SYSTEM A AILERON ACTUATOR ROD ASSEMBLY OUT OF RIG. ACCOMPLISHED ACTUATOR ADJUSTMENT PER AMM 22-11-25-820-801. OPERATIONAL CHECK GOOD BOTH SYSTEMS PASS PER AMM 22-11-25-710-801.