As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
'VTK' ANNUNCIATION ON CAPTAIN'S MAP DISPLAY 3 TIMES DURING CRUISE FLIGHT AT FL380. 'VTK' EXTINGUISHED AFTER 15-20 SECONDS. GROUNDED - YES. FMC L SHOWS PGM FAULT ON LAST FLIGHT LEG. B737-900 FIM 34-61 TASK 807: ONLY THIS FAULT SHOWS. FMC BITE AND ADIRU BITE SHOWS NO FAULTS, REF B737-900 FIM 34-61 TASK 801 AND 34-61 TASK 824. NO HISTORY PAST 30 DAYS.