What was found
DURING APPROACH THE LANDING GEAR WAS EXTENDED AND THERE WAS NO NOSE AND RIGHT MAIN DOWN AND LOCKED INDICATIONS. HYDRAULIC POWER LIGHT AND UNSAFE LIGHT WENT OUT, PILOT FOLLOWED CHECKLIST PROCEDURES WHICH REQUIRE EMERGENCY GEAR BLOWDOWN TO CONFIRM DOWN CONDITION. THE CREW DECLARED AN EMERGENCY AND AFTER USING FUEL SO THAT THERE WAS MINIMUM FUEL ON BOARD THE PLANE LANDED WITH NO PROBLEMS. MAINTENANCE TROUBLESHOT PROBLEM TO FAILED LIGHT BULBS. AIRCRAFT RETURNED TO SERVICE.