What was found
(CAN) ON APPRAOCH THE LANDING GEAR DID NOT DEPLOY IN NORMAL TIME WITH INTRANSIT INDICATION PERSISTING, LANDING GEAR CONTROL C/B TRIPPED. THE BREAKER WAS RESET AND GEAR UP WAS SELECTED UP. THE INTRANSIT INDICATION PERSISTED, GEAR DID NOT RETRACT. GEAR WAS RESELECTED DOWN AFTER WHICH SMOKE BEGAN EMINATING FROM THE FLOOR AREA ABOVE THE MOTOR. THE CONTROL C/B TRIPPED AND THE GEAR WAS EXTENDED MANUALLY AND CONFIRMED. A NORMAL LANDING WAS CARRIED OUT WITH NO FURTHER INCIDENT. THE MOTOR WAS REPLACED, GEAR SWING ACCOMPLISHED AND THE A/C RETURNED TO SERVICE.