What was found
FLIGHT: 9280, DOING A GO AROUND, THE LANDING GEAR HANDLE WOULD NOT MOVE TO THE UP POSITION UNLESS THE DOWN LOCK RELEASE SWITCH WAS USED, THE GEAR FAILED TO RETRACT WITH THE HANDLE IN THE UP POSITION, LANDING GEAR CIRCUIT BREAKER POPPED. REPLACED LANDING GEAR HANDLE CONTROL SWITCH. OPERATIONAL CHECK GOOD.