As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAXI IN, BOTH FMC S SHOWED VTK AND FMC WAS REMOVED FROM CDU MENU. AFTER SEVERAL SECONDS ALL FUNCTIONS RETURNED TO NORMAL. ACFT GROUNDED. FMC LANDING & TAXI VTK MAP NUISANCE ERROR, IAW AMM 34-51-00. AIRCRAFT OKAY FOR CONTINUED SERVICE.