What was found
ON APPROACH, GEAR EXTENDED AND RT MAIN DID NOT INDICATE DOWN & LOCK (GREEN), THE RED LAMP IN GEAR HANDLE EXTINGUISHED. LAMP TEST DID NOT ILLUMINATE LIGHT. CREW FOLLOWED CHECKLIST, PERFORMED MANUAL HYD APPLICATION TO ENSURE EXTENSION OF GEAR. PERFORMED FLY-BY OF TOWER AND VISUALLY VERIFIED GEAR DOWN. DECLARED EMERGENCY AND LANDED WITHOUT INCIDENT. CAUSE IDENTIFIED AS A FAILED LIGHT BULB, INSTALLED NEW LAMPS AND PERFORMED GEAR SWINGS WITH NO FAULT FOUND. MAIN GEAR INDICATIONS ARE A SINGLE LIGHT BULB, NOSE GEAR INDICATIN USES TWO LIGHT BULBS.