As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FIRST OFFICER`S CDU BLANKED OUT SEVERAL TIMES DURING FLIGHT, BUT ALWAYS RETURNED TO NORMAL OPS. AFTER LANDING, THE FIRST OFFICER HAD A VTK FLAG FOR SEVERAL SECONDS THEN WENT AWAY. ACFT GROUNDED. ACCOMPLISHED FIM 34-61 TASK 804. RESET THE POWER TO FMCS AND MCDUS. FOUR CIRCUIT BREAKERS OPENED AND RESET. REPAIR CONFIRMATION CORRECTED FAULT.