As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SHORTLY AFTER TAKEOFF THE FLIGHT CREW REPORTED AN OVERHEAT WARNING ON THE #2 ENGINE. THE ENGINE WAS SHUTDOWN AS PER STANDARD OPERATING PROCEDURE AND FIRE EXTINGUISHERS WERE ACTIVATED. MAINTENANCE CREW DETERMINED THE LOWER FIRE DETECTION LOOP HAD AN INTERNAL SHORT CIRCUIT. THE FIRE WIRE WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE.