As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIRCRAFT WAS GROUNDED: UNCOMMANDED RIGHT ELEVATOR INPUT WITH AUTOPILOT ON. FELT AS RHYTHMIC PITCHING MOVEMENT IN MULTIPLE PHASES OF FLIGHT. MOVEMENT VISIBLE ON FLIGHT PAGE. MAINTENANCE REPLACED ELEVATOR AND AILERON COMPUTER #2 (ELAC) AND ACCOMPLISHED A SATISFACTORY OPERATIONAL CHECK.