As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLT 101 EN-ROUTE LHR - JFK. AIRCRAFT WAS GROUNDED. LT ENGINE FIRE INDICATION AT CRUISE. SHUT DOWN THE LT ENGINE, DECLARED AN EMERGENCY, AND DIVERTED TO DUB. FIRE HANDLE WAS PULLED, FIRE EXTINGUISHER WAS NOT DISCHARGED. LANDED WITHOUT FURTHER INCIDENT. SINGLE ENGINE TIME WAS 28 MINUTES. FIRE/OVHT DETECTOR RT CORE SHORTED, REPLACED RT CORE FIRE DETECTOR ASSY IAW AMM 26-11-01-000-812-003 & C/OUT OPS CHKD IAW AMM 26-11-00-710-801, MSG CLRD AND A POSITIVE FIXED, OK FOR SVC. (CLOSED)