As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH, BOTH VTK FLAGS ON PILOTS AND F/O'S NAV DISPLAYS AND BOTH PILOTS AND F/O'S FMC SCREENS DEFAULTED TO MENU. ACFT GROUNDED. BOTH FMC COMPUTERS SHOW "PGM FAULT" FLT 1 IAW FIM 34-61, TASK 807. NO OTHER FAULTS SHOWN. HAS NO OTHER HISTORY IN TRAX BOTH FMC'S APPEAR NORMAL AT THIS TIME.