As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
LANDING GEAR HANDLE WOULD NOT MOVE FROM THE DOWN POSITION WHEN ATTEMPTING TO RETRACT THE LANDING GEAR AFTER TAKEOFF. JACKED AIRCRAFT CHECKED SYSTEM FOR PROPER OPERATION COULD NOT DUPLICATE. REMOVED AND REPLACED LANDING GEAR CONTROL UNIT. OPS CHECKED GOOD IAW 750 M/M CH 32-30-00