As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
EINN/KORD - FLT 9123 - HAD INTERMITTENT FIRE WARNING ON NR 2 ENGINE DURING CRUISE. KORD MAINTENANCE REMOVED AND REPLACED NR 2 ENGINE FIRE WARNING AMPLIFIER, REPLACED WIRES FROM AMPLIFIER TO NR 2 ENGINE PYLON BOX. SYSTEM OPS CHECKED GOOD. (X)