As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AIR TURNBACK DUE TO NR 2 ENG FIRE WARNING LT CAME ON INTERMITTANTLY INFLT. RETARDED THROTTLE, LIGHT WENT OUT. TESTED CIRCUIT TESTED OK. AIRCRAFT MADE AN UNEVENTFUL LANDING. INSPECTED NR 2 ENG FOR EVIDENCE OF FIRE OR OVERHEAT CONDITIONS, OK TO CONTINUE PER MEL. (LG PG 190147).