As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - DURING CLIMBOUT FIRE DETECTION LOOP -A- LIGHT ILLUMINATED THEN -B- ILLUMINATED. RETARDED THROTTLE AND LIGHTS EXTINGUISHED. RETURNED TO DFW AND LANDED WITHOUT INCIDENT. REPLACED RIGHT HAND ENGINE ANTI-ICE DUCT. LEAK CHECKED. SYSTEM GROUND CHECKED NORMAL OPERATION.