As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER LANDING, CAPT'S ND DISPLAYED "VTK". FOLLOWED BY A LOSS OF ALL DATA ON BOTH FMC'S. GROUNDED - YES. L FMC LOGGED "PGM FAULT" LAST FLIGHT LEG. PERFORMED FIM 34-61 TASK 807, FAULT WAS AN INTERMITTENT FAULT. AC OK FOR CONTINUED FLIGHT. ETOPS GRD VERIFICATION NML.