As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT NR ATN 819 / KDFW TO KTOL. DURING CLIMBOUT FROM KDFW NR 4 ENGINE FIRE WARNING LIGHT CAME ON, THE CREW DISCHARGED BOTH FIRE BOTTLES AND LIGHT REMAINED ON. THE CREW RETURNED TO KDFW AND LANDED WITHOUT INCIDENT. CORRECTIVE ACTION IN WORK. (A)