AN A300 AT FL300 HAD BOTH FLT MGMNT SCREENS GO BLANK AND #1 AUTOPLT DISCONNECTED. WHEN #1 AUTOPLT ENGAGED; YOKE MOVED FORWARD THEN DISCONNECTED.

Narrative

WHILE ENRTE AT FL300; APPROX 60 MI E OF SLT WITH AUTOPLT #1 ENGAGED; ATC CLRED US DIRECT TO APE. CAPT WAS FLYING. FO ON THE RADIO. THE #1 FMC WAS USED TO ENTER DIRECT TO APE. AFTER APE WAS EXECUTED; BOTH FMC SCREENS BLANKED AND THE #1 AUTOPLT DISCONNECTED AND THE ACFT STARTED AN IMMEDIATE CLB. FMC SCREENS CAME BACK UP WITH A 'PLEASE WAIT' MESSAGE IN THE SCRATCH PAD. CAPT LEVELED OFF BACK AT FL300 AFTER A CLB TO FL302.9. AFTER THE RE-LEVEL AT FL300; #2 FLT DIRECTOR FAIL MESSAGE APPEARED WITH LOSS OF FLT DIRECTOR ON FO SIDE; MESSAGE REMAINED FOR SEVERAL SECONDS. WHEN ACFT WAS LEVEL AND IN TRIM; #1 AUTOPLT WAS RE-ENGAGED. THE YOKE IMMEDIATELY MOVED FORWARD WITH FORCE AND AUTOPLT #1 DISCONNECTED AGAIN. AFTER ACFT WAS STABILIZED; #2 AUTOPLT WAS ENGAGED WITHOUT FURTHER INCIDENT. UPON LNDG; THOROUGH DEBRIEF WITH MAINT TOOK PLACE. WE NOTED A FAILURE LIGHT FOR AN EVENT INFLT WAS RECORDED ON THE MAINT PANEL. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: THE RPTR STATED THE CAUSE OF THE DUAL FMS FAILURE AND THE #1 AUTOPLT FAILURE IS UNKNOWN. #2 AUTOPLT FUNCTIONED NORMALLY AND WAS USED THE REMAINDER OF THE FLT. MAINT HAS RELEASED NO INFO ON THE ACTION TAKEN.