What was found
AFTER TAKEOFF, THE LANDING GEAR DID NOT RETRACT. THE PILOT DECIDED TO RETURN TO DEPARTURE. MAINT DETERMINED THAT A UPLOCK WAS OUT OF SEQUENCE. UPLOCK WAS RECYCLED AND ACFT WAS RETURNED TO SERVICE. ACFT BLOCKED OUT FOR A SECOND TIME. AFTER TAKEOFF, LANDING GEAR DID NOT RETRACT FOR THE SECOND TIME. PILOT RETURNED THE ACFT TO DEPARTURE. ACFT WAS THEN TAKEN FOR A GEAR RETRACTION AND TROUBLESHOOTING. MX FOUND A BAD LANDING GEAR SELECTOR. THE SELECTOR WAS REMOVED AND REPLACED AND THE ACFT RETURNED TO SERVICE.