What was found
WHILE ON APPROACH TO MHT PILOT ATTEMPTED TO EXTEND LANDING GEAR FOR LANDING AND DID NOT GET AN INDICATION FOR THE NOSE GEAR BEING DOWN AND LOCKED. PILOT ATTEMPTED TO RETRACT AND EXTEND GEAR AGAIN WITH SAME RESULT. PILOT DID A GO AROUND AND TRIED TO REPLACE BULB WITH NO CHANGE. PILOT FOLLOWED EMERGENCY CHECKLIST AND PUMPED GEAR DOWN AND PERFORMED LANDING WITHOUT FURTHER INCIDENT. MAINTENANCE INSPECTED AIRCRAFT AND DETERMINED THAT THE CONNECTOR FOR THE DOWNLOCK INDICATION LIGHTS WAS LOOSE. CONNECTOR WAS INSPECTED AND RE-SECURED AND SYSTEM TESTED PER APPROPRIATE MANUAL. ALL CHECKS SATISFACTORY. AIRCRAFT RETURNED TO SERVICE.