As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENROUTE AT 350, BOTH FMC'S FAILED FOR APPROXIMATELY 2 MINUTES. VTK ON BOTH ND'S LNAV/ VNAV DISENGAGE. BOTH FMC'S RECOVERED AND WORKED NORMALLY FOR REMAINDER OF FLIGHT. GROUNDED - YES. ACCOMPLISHED B737-9 IFIM 34-64-00. RESET BOTH FMC COMPUTERS. BOTH FMC COMPUTERS OPS CHECK NORMAL.