As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING LATERAL OFFSET TO AVOID WEATHER, FIRST OFFICER'S MAP DISPLAY VTK AND SCRATCHPAD INDICATED SINGLE FMC OPERATION. FOLLOWED QRC AND RELOAD DUAL FMC OPERATION. GROUNDED - YES. PERFORMED B737-900 FIM 34-61 TASK 836 RESET C/B 6D16 AND 18A6. SYSTEM OPS CHECK OK.