As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF WENT TO RETRACT THE GEAR AND THE HANDLE WOULD NOT MOVE. THE GEAR WAS STUCK IN THE DOWN POSITION. RETURNED TO DEPARTURE POINT. TROUBLESHOT DISCREPANCY TO A WORN NOSE GEAR SQUAT SWITCH CAM. REMOVED WORN CAM AND INSTALLED A NEW NOSE GEAR SQUAT SWITCH CAM WITH NEW HARDWARE. OPERATIONAL CHECK GOOD. WORK PERFORMED IAW CHAPTER 32-20-02 OF THE CITATION 750 CMM AND 32-00-01 OF THE CITATION 750 MM.