BE35 BONANZA ACFT HAD GEAR INDICATING PROB; BUT FIRST LNDG TWR VERIFIED IT WAS DOWN. RETURN FLT AND NEXT LNDG FLC ASSUMED IT WAS DOWN BECAUSE OF MOTOR NOISE; BUT IT WASN'T AND THEY LANDED GEAR UP. GEAR MOTOR CIRCUIT BREAKER WAS POPPED.

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I WAS RECEIVING DUAL INSTRUCTION ABOARD THE SUBJECT ACFT BY AN INSTRUCTOR. WE DEPARTED AXH AT AROUND XA00. THIS WAS AN INSTRUCTED XCOUNTRY AS PART OF A 15 HR CHKOUT ON THIS BONANZA. WE FLEW TO AND LANDED AT CPR WITHOUT ANY PROB. WE THEN FLEW TO AUS. WHILE ON APCH WE DID NOT GET A GEAR DOWN LIGHT; AND WE REQUESTED THAT THE TWR VERIFY THE GEAR WAS EXTENDED. TWR CONFIRMED GEAR DOWN. GEAR DOWN LIGHT WAS ADJUSTED BY THE INSTRUCTOR PLT AND STAYED ON. LNDG WAS UNREMARKABLE. LAST LEG WAS BACK TO AXH. AGAIN ON APCH; NO GEAR DOWN LIGHT. WE DID A GAR. RAISED GEAR AND HEARD MOTOR. LOWERED GEAR; HEARD MOTOR BUT THE GEAR DOWN LIGHT STILL FLICKERED. WE LANDED THINKING GEAR WAS DOWN; BUT IT WAS NOT. LNDG WAS WITH ENG AT IDLE. UPON TOUCHING GND; MIXTURE AND IGNITION WERE TURNED OFF. ACFT CAME TO REST ON CTRLINE WITH NOSE ABOUT 4 FT TO THE L. UPON EXITING ACFT; GEAR DOORS WERE OPEN BUT GEAR HAD NOT EXTENDED. EXAMINATION OF THE CIRCUIT BREAKER PANEL REVEALED THAT THE GEAR MOTOR CIRCUIT BREAKER WAS POPPED. THE ACFT WAS RAISED WITH A JACK; THE BREAKER PUSHED BACK AND THE GEAR EXTENDED. CONTRIBUTING FACTORS TO THE EVENT: 1) THE GEAR DOWN GREEN LIGHT BULB HAD BURNED OUT EARLIER IN THE WK. THE INSTRUCTOR AND I WERE INFORMED THAT THE GEAR UP LIGHT HAD BEEN SWITCHED TO THE GEAR DOWN POS UNTIL A NEW LIGHT COULD BE OBTAINED. 2) LIGHT FLICKERING AND THEN STAYING ON DURING THE AUSTIN LNDG GAVE THE INSTRUCTOR CONFIDENCE THAT THE GEAR WAS DOWN BUT RATHER THERE EXISTED A PROB WITH THE INDICATOR LIGHT. THERE WERE NO INJURIES; AND THE EXTENT OF THE DAMAGE TO THE ACFT IS UNKNOWN AT THIS TIME.