As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
APPROX HALF WAY THROUGH THE FLIGHT THE FMC HAD AN ANOMALY THAT RESEMBLED A DUAL FMC FAILURE TO INCLUDE DUAL VTK AND DUAL MENU PAGE PRESENTATION ANOMALY LASTED FOR LESS THAN 2 MINUTES BEFORE RETURNING TO NORMAL OPERATIONS. GROUNDED - YES. PERFORMED B737-900 FIM 34-61TASK 836 CYCLED FMC COMPUTER 1&2 CIRCUT BREAKERS VERIFIED NO FLAGS PRESENT