What was found
ON ARRIVAL FMC DUMPED ROUTE AT 8000-A/P WENT TO CWS ROLL AND PITCH. RELOADED FMC OPS NORMAL AFTER THAT. EARLIER THERE WAS LAG BETWEEN NAV DISPLAYS WHEN CHANGING LEGS PAGE AND DESCENTS- F/O NAV DISPLAY WAS LAGGING. GROUNDED - YES. COULD NOT DUPLICATE DISCREPANCY. ACCOMPLISHED FMC BITE PROCEDURE NO CURRENT FAULTS AND NO FAULTS LAST FLIGHT LEG REF FIM 34-61 TASK 801 A/C OK FOR SERVICE, NO HISTORY 30 DAYS.