What was found
ENGINE OVERHEAT LIGHT NR 2 CAME ON AFTER TAKEOFF. STAYED ON TILL ENG REDUCED TO IDLE THEN STAYED OFF, LANDED. IAW LP 7864231 FOR CORRECTIVE ACTION. PERFORMED HIGH POWER RUN ON NR 2 ENG FOR FIVE MINUTES IAW MM 71-00-00, NO DEFECTS NOTED AT THE TIME. ACFT OK TO CONTINUE. ACFT AIR RETURNED. R & R BOTH LOWER CORE FIRE LOOPS TO COMPLY WITH FAULT, IAW LP 7864231 & ALSO R & R FIRE DETECTOR. COMPLIED WITH OVERWEIGHT LANDING INSPECTION IAW LP 7864239. NR 1 MLG TIRE FUSE B PLUG DEPLOYED AFTER ARRIVAL. R & R NR 1 & NR 2 MLG TRIES IAW LP 7864238.