What was found
APPROXIMATELY 20 NAUTICAL MILES PRIOR TO TOD, LT FMC FAILED WITH VTK ON CAPTAIN`S MAP DISPLAY. FMC BOTH ON RT IAW QRH. ACFT GROUNDED. LT FMC WAS INOPERATIVE ON ARRIVAL, CYCLED CIRCUIT BREAKER, OPS RESTORED. ACCOMPLISHED FMC OPS TEST IAW 34-61-00, SYS CHECKED NORMAL.