What was found
FLIGHT CREW DIVERTED TO HND DUE TO THE LOSS OF BOTH FMC'S. AS CREW WAS RUNNING THE QRH, THE RIGHT FMC FAILED. AIRCRAFT LOST AUTOPILOT, AND ALL LNAV/VNAV FUNCTIONS. CREW PULLED, RESET CBS AND ATTEMPTED CONTACT WITH MCC VIA SATCOM, DECISION TO DIVERT TO HND. EMERGENCY DECLARED WITH ATC. CREW REPORTED THAT R FMC HAD RETURNED TO OPERATION 10-15 MINUTES AFTER CB RESET. REPLACED THE L FMC AND CROSS LOADED NAV DATA BASE AND VERIFIED SOFTWARE PER AMM 34-61.