As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROXIMATELY 20 MINUTES AFTER TOC HAD VTK INDICATED ON THE CAPTAIN'S DISPLAY. QRH COMPLIED WITH FOR FMC FAILURE. FLIGHT CONTINUED WITH BOTH ON RT FMC. ACFT GROUNDED. NO INFLIGHT FAULTS LOGGED IN FMC. NO VTK FLAG. LT FMC, OPS NORMAL REF MM 34-61-00.