What was found
PILOT REPORTED AFTER TAKE OFF, THE GEAR WAS RETRACTED NORMALLY. UPON APPROACH, THE GEAR HANDLE WAS SELECTED DOWN, BUT THERE WAS NO GEAR MOVEMENT AND NO LIGHT INDICATION. PILOT INDICATED HE CHECKED THE CONTROL BREAKER AND FOUND IT POPPED. HE RESET THE BREAKER AND TRIED TO PUT GEAR DOWN WITH NO RESPONSE. PILOT THEN INITIATED QRH WITH NO RESPONSE AND THEN PUT GEAR DOWN SUCCESSFULLY WITH THE EMERGENCY EXTENSION PUMP, INCLUDING 3 GREEN DOWN AND LOCKED LIGHTS. AIRCRAFT LANDED SUCCESSFULLY WITH NO DAMAGE OR FURTHER INCIDENT.