As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - CREW REPORTED LEFT ENGINE LIGHTS ILLUMINATED DURING FLIGHT. EMERGENCY DECLARED RETURNED DFW LANDED WITHOUT INCIDENT. AIRCRAFT REMOVED FROM SERVICE. FOUND INLET ANTI ICE DUCT BLOWN. REPLACED DUCT. SYSTEM GROUND CHECKED NORMAL OPERATION.