THE INSTRUCTOR AND THE OWNER PULLED THE LNDG GEAR WARNING CIRCUIT BREAKER DURING SOME PRACTICE SINGLE ENG MANEUVERS AND FORGOT TO RESET THE CIRCUIT BREAKER AND LANDED GEAR UP.

Narrative

EARLIER IN THE FLT I HAD PULLED OUT THE CIRCUIT BREAKER THAT CTLED THE GEAR WARNING HORN WHILE PRACTICING SINGLE ENG MANEUVERS. AFTER COMPLETION OF THESE MANEUVERS THE CIRCUIT BREAKER WAS RESTORED TO ITS NORMAL POS. THE OWNER THEN WANTED TO PRACTICE SINGLE ENG APCHS AFTER FEATHERING; SECURING; AND RESTARTING 1 ENG. AFTER RESTARTING THE FEATHERED ENG THE OWNER SIMULATED LOSING AN ENG BY PULLING THE R THROTTLE TO IDLE. THEN HE SIMULATED FEATHERING THE ENG BY ADJUSTING THE THROTTLE TO ZERO THRUST. THIS AGAIN CAUSED THE GEAR WARNING HORN TO SOUND. THE OWNER THEN INSTRUCTED ME TO PULL THE CIRCUIT BREAKER OUT. I DID SO. HE CONTINUED THE APCH AND ONCE LNDG HAD BEEN ASSURED HE LOWERED 1 NOTCH OF FLAPS AND THE GEAR. ON SHORT FINAL NEITHER ONE OF US VERIFIED 3 GREEN LIGHTS. THE MISTAKE WAS NOT REALIZED UNTIL IT WAS TOO LATE. ON THE GND I REALIZED THAT THE CIRCUIT BREAKER WAS STILL PULLED AND THAT IT CTLED THE ENTIRE LNDG GEAR SYS. THIS WAS A FACT I SHOULD HAVE BEEN AWARE OF BEFORE THE FLT. ALTHOUGH I DID READ THE MANUAL PRIOR TO THE FLT; I DID NOT EVEN THINK ABOUT THE GEAR SYS. IN THE FINAL PHASES I SHOULD HAVE VERIFIED 3 GREEN LIGHTS.