As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED NUMBER 2 ENGINE FIRE LOOP HAD A FIRE INDICATION FOLLOWED BY WARNING BELL. EMERGENCY DECLARED RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. REPLACED ANTI ICE DUCT THAT WAS BLOWN. SYSTEM GROUND CHECKED NORMAL OPERATION.