As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DFW - FLT 0901 - AFTER TAKEOFF DFW DURING CLIMB-OUT THROUGH FL 290, EXPERIENCED NR 1 ENGINE FIRE WARNING. ACCOMPLISHED ABNORMAL PROCEDURES AND AIRCRAFT RETURNED TO DFW LANDING WITHOUT INCIDENT. REPLACED NR 1 ENGINE A-LOOP FIRE DETECTOR WARNING MID-HARNESS. SYSTEM GROUND CHECKED, NORMAL OPERATION. (X)