As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF AND DURING CLIMBOUT FROM KMFE, THE FLIGHT CREW EXPERIENCED A NR 1 ENGINE FIRE WARNING. THEY PULLED THE THROTTLE BACK TO IDLE AND THE WARNING WENT OUT. THEY DUMPED APPROX 5,000 OF FUEL AND LANDED SAFELY BACK AT KMFE. TROUBLESHOOTING ON 3/3/2019 REVEALED THAT A BLEED AIR LEAK CAUSED THIS FIRE WARNING AND NOT AN ACTUAL FIRE EVENT.