As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
AFTER TAKEOFF, LANDING GEAR WOULD NOT RETRACT. LANDING GEAR HANDLE WAS STUCK IN THE DOWN POSITION. FOUND NOSE GEAR TORQUE LINK SQUAT CAM LOOSE. SECURED AND ADJUSTED CAM. CHECKED NOSE GEAR SQUAT SWITCH ADJUSTMENT, FOUND NORMAL. LANDING GEAR EXTENSION AND RETRACTION CHECKS NORMAL. WORK PERFORMED IAW CHAPTER 32-60-00 AND 32-30-00 OF THE CITATION 750 M/M REV 33 AND CHAPTER 32-20-02 OF THE CITATION 750 CMM REV 6.