As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ALL AUTO PILOTS DISCONNECTED & NO LAND 3 STATUS MSG. CMC FAULT DOWNLINKED AUTOPILOT BACKDRIVE RT. BACKDRIVE SYS INOPERATIVE OR DEGRADED DUE TO FAILURE IN RT COLUMN. CREW CYCLED CB AS NO AUTOPILOTS WOULD ENGAGE. THE CYCLING OF THE BREAKER ALLOWED THE AUTOPILOT TO RE-ENGAGE BUT CREW COULD NOT CLEAR THE EICAS STATUS MSG OR THE NO LAND 3 MSG & DECIDED TO RETURN TO THE FIELD. FUEL DUMPED.