As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
NO FMC DATA ON CA NAV DISPLAY MAP MODE AND NO FMC DATA ON BOTH CDU'S. VTK FOLLOWED BY MAP FAILURE FLAGS ON CA NAV DISPLAY (REPEATED 4-5 TIMES). GROUNDED - YES. ACCOMPLISHED FIM 34-61 TASK 836 FMC DOES NOT OPERATE. RESET BOTH FMC COMPUTERS OPS CHECK NORMAL.