What was found
CENTER AUTOPILOT DISCONNECTED AT FL340 .79M LOST CAPT FLT DIRECTOR. LEFT A-P SELECTED. SAMC TEXT: CREW REPORTED CENTER AUTOPILOT DISENGAGED AND CAPTS FD BARS BIASED OUT OF VIEW SIMULTANEOUSLY. ENGAGED LEFT AUTOPILOT. MAINT TEXT: CREW REPORTED WHEN CTR AUTOPILOT DISENGAGED CAPTAIN LOST FLIGHT DIRECTOR BAR COMMANDED FROM LEFT AUTOPILOT. WHEN LEFT AUTOPILOT ENGAGED AND CAPTAIN FLIGHT DIRECTOR TO CTR, FLIGHT DIRECTOR BAR RETURNED TO CAPTAIN'S INSTRUMENT. PERFORMED APFD GRD TEST AS PER MM. ALL TEST AND IND NORMAL. FLT DIRECTOR DISPLAY NORMAL.