As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SHORTLY AFTER TAKEOFF, THE NR 4 ENGINE NACELLE TEMPERATURE BEGAN TO INCREASE FOLLOWED BY THE FIRE WARNING ANNUNCIATION. THE CREW FOLLOWED COM PROCEDURES AND WHEN POWER WAS REDUCED THE FIRE WARNING CEASED AND THE NACELLE TEMPERATURE BEGAN TO DECREASE. THE NR 4 ENGINE WAS SHUT DOWN AND THE FLIGHT RETURNED TO MSP LANDING WITHOUT INCIDENT. THE ENGINE WAS REPLACED. OPERATIONAL CHECK GOOD.