As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
HAD WHAT APPEARED TO BE AN INTERMITTENT L FMC FAILURE. HAD "VTK" ANNUNCIATED ON CAPTAINS SIDE, 2ND MAP FAILURE FLAG ON BOTH CA AND FO NDS. SITUATION CORRECTED ITSELF BEFORE WE COULD EVEN PICK UP THE QRH. AIRCRAFT WAS APPROX 80 MILES WEST OF JOT VOR FL350. GROUNDED - YES. PERFORMED FIM 34-61 TASK 836 SYS OPS CK NORMAL.