As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT#41, FLL-MDE. (AIRCRAFT PERFORMED AN AIR TURN BACK TO FLL) ' IN-FLIGHT FMGC 1 FAILED AND BLANKED CAUSING AP1 TO TRIP. CAME BACK AND THEN FAILED WITH 2FD2 DISPLAYED ON PFD PATCH WITH DISPATCH AND MTC MADE JOINT DECISION TO RETURN TO FLL; REMOVED AND REPLACED FMGC #1 IAW AMM22-83-34. BITE CHECK GOOD SEE LG3432654-1 FOR CAT 3 TEST.