As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON INITIAL CLIMB GOT A "DISCO" (DISCONNECT OF OUR ROUTE ON BOTH FMC'S) FOLLOWED IMMEDIATELY BY "VTK" ON BOTH ND'S THEN BOTH ND'S WENT BLANK AND BOTH FMCS WENT TO BASIC ACARS/ACMC MENU. THIS LASTED APPROX 10 SECONDS AND THEN EVERYTHING RETURNED TO NORMAL AND WORKED FOR DURATION OF FLIGHT. LT & RT FMC'S LOGGED 1 FAIL ON LAST LEG. BOTH FMC'S TEST GOOD. NO DEFECTS FOUND.