As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, THE CREW RECEIVED AN ENG 2 FIRE DETECTOR FAILED MESSAGE ON EICAS. FOLLOWED PROCEDURES AND RETURNED TO DEPARTURE, LANDED WITHOUT FURTHER INCIDENT. NO EMERGENCY WAS DECLARED. MAINTENANCE REPAIRED A DAMAGE WIRE THE NR 2 ENGINE FIRE DETECTOR CONNECTOR IAW SWPM 20-21-00. SYSTEM OPS CHECKED GOOD. AIRCRAFT RETURNED TO SERVICE.