What was found
AFTER TAKEOFF THE GEAR WOULD NOT RETRACT, NO UNLOCK LIGHT OR ANY FLICKERING OF THE 3 GREEN LIGHTS, ACCOMPLISHED AIR TURN BACK TO SJC. - FOUND LANDING GEAR CONTROL HANDLE DEFECTIVE, REMOVED DEFECTIVE LANDING GEAR CONTROL HANDLE AND INSTALLED NEW UNIT IAW MFG 560XL MM CHAPTER 32-30, SYSTEM OPS CHECKED GOOD.