As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LOST BOTH FMC DURING CRUISE, FOR A FEW MINUTES THEN CAME BACK. LOST BOTH AT THREE DIFFERENT TIMES AND EACH TIME CAME BACK AFTER A FEW MINUTES. ACFT GROUNDED. ACCOMPLISHED FAULT REVIEW ON FMC, APPEARS TO HAVE HAD POWER INTERRUPTIONS. CURRENT STATUS IS GOOD, COULD NOT DUPLICATE PROBLEM ON GROUND. REPLACED THE NR 1 AND 2 FMC TRANSFER RELAYS AS A PRECAUTION. ALL OPS NORMAL IAW AMM 34-61-04-000-801.