As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AUTO-PILOT DISENGAGED AT CRUISE FLIGHT AS WELL AS THE YAW DAMPER DISCONNECTED. COMPLIED WITH CHECKLIST AND UNABLE TO RESET YAW DAMPER OR AUTOPILOT. REMOVED AND REPLACED YAW DAMPER ACTUATOR. OPERATIONAL CHECKS GOOD. AIRCRAFT RETURNED TO SERVICE.