As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW INFLIGHT - DURING CLIMB, LEFT ENGINE FIRE LOOP ILLUMINATED. AFTER ACCOMPLISHING CHECKLIST THE FIRE LOOP WARNING EXTINGUISHED. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED LEFT ENGINE ANTI ICE BLEED LINE. SYSTEM GROUND CHECKED NORMAL OPERATION.