What was found
AFTER TAKEOFF, LANDING GEAR HANDLE WOULD NOT MOVE FROM THE DOWN POSITION, UNABLE TO RETRACT GEAR. REMOVED AND REPLACED NOSE GEAR SQUAT SWITCH, WIRING AND CONNECTOR JG019. ADJUSTED NOSE LANDING GEAR SQUAT SWITCH REF. CE-750 M/M CHPT 32-60-00. SWUNG LANDING GEAR SEVERAL TIMES, OPS CHECK GOOD.