As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DUAL FMC FAIL FOR ABOUT 3 MINUTES. HAPPEN JUST BEFORE LEVEL OFF AT CRUISE WHILE ENTERING DIRECT IN THE LEGS PAGE. FOLLOWED QRH AND THE FMCS RESET THEMSELVES. WE HAD TO RELOAD ALL THE INIT DATA AND PERF DATA. THE LANDING ALT FLAG WAS DISPLAYED UNDER THE VSI FOR ANOTHER HOUR THEN CLEARED ITSELF. ACFT GROUNDED. FMC BITE SHOWS LT FMC FAILED ON PREVIOUS FLT & ON GROUND. REPLACED LT FMC REF MM 34-61-02. OPS CKD NORMAL.