As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ENGINE FIRE R RED CAS: DURING TAXING OUT RIGHT ENGINE FIRE CAS MESSAGE CAME ON WITH THE MASTER WARNING. EVACUATE THE AIRCRAFT ON THE TAXIWAY AND CALL FIRE DEPARTMENT TO EVALUATE . NO FIRE SEEN ON THE RIGHT ENGINE NEITHER FUEL LEAKS . CORRECTIVE ACTION: REMOVED AND REPLACED RIGHT ENGINE GEARBOX FIRE SENSOR WITH NEW SENSOR IN REFERENCE TO GKN / AEROSPACE 700 AMM, CH 26-12-13.