What was found
(CAN) DURING THE BEFORE TAKEOFF CHECKS PILOTS NOTICED THAT NR 2 ENGINE FIRE WARNING LIGHT CAME ON INTERMITTENTLY. PILOTS DID NOT NOTICED ANY SECONDARY INDICATIONS FOR ENGINE FIRE. THEY IMMEDIATELY SHUT DOWN BOTH ENGINES AND CHECKED THE ENGINES FOR SIGNS OF FIRE. NOTHING UNUSUAL WAS FOUND. THE HELI DECK CREW ALSO CONFIRMED NOTHING UNUSUAL. AFTER CONSULTING THE MAINTENANCE STAFF, A/C WAS FLOWN BACK TO THE BASE EMPTY WITHOUT FURTHER INCIDENTS.