As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON TAXI IN WE HAD A DUAL FMC FAILURE (VTK ON BOTH NAV DISPLAYS). ABOUT 30 SECONDS LATER THE PROBLEM CLEARED AND OPS NORMAL. GROUNDED - YES. PERFORMED FIM 34-61 TASK 801, NO FAULTS LOGGED. PERFORMED FIM 34-61 TASK 807 AND FOUND 1 FAULT (FMC-L PGM FAULT). LT AND RT FMC'S OPERATE NORMALLY AT THIS TIME - NO HISTORY IN 30 DAYS. THERE WAS AN INTERMITTENT FAULT THAT HAS CLEARED.