20000405002049I

(-23) On April 5, 2000 at approx. 1900 PDT, N3048R was operating for instructional purposes. During the landing approach at grand canyon west (IG4) Mr. Schultz noticed no landing gear indicating light showing that gear was safely down and locked. He confirmed that the naviation lights were off and immediately noticed that the 5 amp gear control circuit breaker had been tripped. He reset the circuit breaker and it tripped again and decided to abort landing and return to north Las Vegas airport. Upon arrival in the pattern he reset the circuit breaker and tried to extend the landing gear with the circuit breaker tripped again. He ran through the manual extension checklist and used the emergency extension gear lever and verified in the mirror on the engine nacelle that a gear was extended. He reset the circuit breaker momentarily identifying that both main gears was showing they were down and locked by the gear lights illuminating green, but noticed that the nose gear light was not illuminated. He physically switched the green lights to confirm they were all working and requested to head out to the practice area and notified tower that he was having problems with the landing ge ar. They arrived at the practice area and executed some maneuvers, to get the nose gear to produce a down and locked indication with negative results. Next he pulled back the throttles past the micro switch to see if the gear warning light would illuminate and listened for the warning horn. The horn did not sound nor did the lights illuminate. Additionally he extended the flaps to twenty-five degrees to check for warning indications with none present. He called tower and notified them of his condition and declared an emergency. Performed two low approaches by the tower and they confirmed that the landing gear was showing to be down. Tower cleared him for landing on runway two-five and landed aircraft safely. Will have maintenance issue a m or d report after discrepancies have been found.