As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON APPROACH CAPTAINS MCDU BLANKED FOR ABOUT 20 SEC THEN IT RESTARTED TO THE MENU, BUT WITHOUT THE ACARS OPTION. ALSO INTL REQ AT BOTTOM SCREEN AND ACARS NO COM MESSAGE. GROUNDED - YES. ACCOMPLISHED FMC BITE REF B737-900 FIM 34-61 TASK 801 NO INFLIGHT FAULTS NOTED. SENSOR TEST PASSED.