As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE AIRCRAFT DEPARTED DTW AND ON CLIMB-OUT, THE LANDING GEAR HANDLE WOULD NOT MOVE TO THE RETRACT POSITION. THE AIRCRAFT RETURNED TO DTW AND MAINTENANCE WAS ABLE TO DUPLICATE. UNDER CESSNA'S RECOMMENDATION, NEW SB 750-32-05 AND SB 750-32-10 INCORPORATED TO ELIMINATE PROBLEMS IN NOSE STRUT EXTENSION.