As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
RIGHT FMC FAIL ON VECTORS IN TERMINAL AREA. FAULT RESOLVED ITSELF WITHOUT FURTHER ACTION. GROUNDED-YES. PERFORMED B737-900 FIM 34-61 TASK 836. LAST LEG RT FMC FAILED FOR WATCHDOG TIMER. OPENED, RESET FMC 2 C/B ON P6-1. RT FMC OPERATIONS NORMAL, REF B737-900 AMM 34-61-00. ETOPS GND VERIFICATION TEST SUCCESSFUL.