As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FOUND FIRE DETECT CABLE GROUNDED DUE TO CONDITION OF CABLE, CHANGE CABLE BEFORE REACHING SAME CONDITON. THE RIGHT ENGINE'S, P-20199, FIRE LIGHT CAME ON IN-FLIGHT. THE ENGINE WAS SHUT DOWN AND THE PLANE WAS RETURNED TO DFW. THERE WAS NO INDICATION OF FIRE AND PROBLEM WAS NOT DUPLICATED ON GROUND.