As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT AT 21,000 DUAL FMC FAILURE WITH VTK AND MAP FLAGS ON CAPTAIN'S SIDE. RESTORED AFTER 1 MINUTE WITHOUT CREW ACTION. GROUNDED - YES. LT FMC SHOWED L-DATE FAULT CAUSED REBOOT IN FLIGHT. REF FIM 34-61 TSK 801 & 829 REBOOTED LT FMC NORM OPS RESTORED & NO CURRENT FAULTS. FMC BITE TEST OK.