What was found
THE NR 2 ENGINE FIRE WARNING LIGHT ILLUMINATED. ENGINES WERE OPERATING NORMALLY. FLIGHT NURSE AND PILOT NOTICED A SLIGHT BURNING SMELL. DISCHARGED THE NR 2 ENGINE FIRE BOTTLE INTO THE NR 2 ENGINE. THE NR 2 ENGINE FIRE WARNING LIGHT REMAINED ILLUMINATED. DISCHARGED THE NR 1 ENGINE FIRE BOTTLE INTO THE NR 2 ENGINE. THE PILOT TURNED TO THE NEAREST AIRPORT KSFQ, DECLARED AN EMERGENCY WITH APPROACH AND LANDED UNEVENTFUL. EMERGENCY SHUTDOWN AND EVACUATION WAS UNEVENTFUL. POST FLIGHT INSPECTION DID NOT INDICATE ANY FIRE DAMAGE TO THE ENGINE COMPARTMENT. INSPECTION OF ENGINE DID NOT REVEAL SIGNS OF FIRE OR OVERHEATING. PERFORMED FIRE INDICATING FUNCTIONAL CHECKS IAW MM 706-3. REPLACED FIRE EXTINGUSHER BOTTLES AND SQUIBS IAW MM 706-4 AND 706-6. CLEANED DECK CONNECTIONS, INSPECTED FIRE EXTINGUSHING SYSTEM IAW MM 706-4. GROUND RAN AND HOVERED ACFT FOR 25 MINUTES. COULD NOT DUPLICATE FIRE LIGHT.