As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT, RIGHT NAV DISPLAY LOST GUIDANCE AND DISPLAYED VTK MSG FOR APPROX 15 SECONDS. NORMAL OPERATION RESTORED W/OUT CREW INTERVENTION. GROUNDED - YES. PERFORMED FIM 34-61 TASK 836. R/H FMC OP'S NORMAL AND NO OTHER DEFECTS NOTED. A/C OK FOR SERVICE.