As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB, THE CREW REPORTED THAT THE NR 1 ENGINE WAS VIBRATING AND HAD A HIGH EGT AND INTERMITTENT FIRE WARNING. POWER WAS REDUCED TO IDLE. DECLARED AN EMERGENCY AND RETURNED TO DEPARTURE AND LANDED WITHOUT FURTHER INCIDENT. ACFT GROUND. REPLACED THE LEFT ENGINE.