As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) AFTER TAKE-OFF, RT ENGINE FIRE ANNUNCIATOR ILLUMINATED, THEN EXTINGUISHED. CREW VIEWED ENGINE FOR ANY SIGNS OF FIRE AND VERIFIED ALL ENGINE PARAMETERS NORMAL. CREW DECIDED TO RETURN TO BASE. MAINTENANCE FOUND RT ENGINE ,FOWARD TOP FIRE DETECTOR FAULTY. REPLACED FIRE DETECTOR, AND AIRCRAFT RETURNED TO SERVICE.