As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE CREW REPORTED THE AUTO PILOT KICKED OFF WHEN GOING TO FLAPS 20, WENT BACK TO FLAPS 8 AND RE-ENGAGED AUTO PILOT, TRIED AGAIN WITH SAME RESULT. MAINTENANCE OPERATIONALLY CHECKED THE AUTO PILOT SYSTEM. OPS CHECKS GOOD. COULD NOT DUPLICATE ON THE GROUND. THE AIRCRAFT WAS RELEASED FOR SERVICE.