As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING DESCENT EXPERIENCED MOMENTARY LOSS OF BOTH FMC'S FOR APROXIMATELY THIRTY SECONDS WITH VTK FLAGS ON BOTH NAV DISPLAYS. FMC'S SENSOR STATUS SHOWS NO FAULTS AND INFLIGHT FAULTS SHOW PGM MAINTENANCE MESSAGE FOR LEFT AND RIGHT FMC. ACCOMPLISHED FIM 34 61 TASK 801 AND 34 61 TASK 807. BOTH FMC'S RESTORED TO NORMAL.