As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING TAKEOFF, THE PILOT NOTICED THE CYCLIC AND COLLECTIVE ARE STIFF WITH NO FRICTION APPLIED. THE PILOT FOLLOWED EMERGENCY CHECK LIST AND LANDED. THE SUBSEQUENT INSPECTION BY MECHANIC REVEALED THAT THE HYD PUMP SHAFT SPLINES WERE STRIPPED. REMOVED AND REPLACED HYD PUMP, HYD FILTER AND HYD LINES AND THE AC WAS RETURNED TO SERVICE UPON COMPLETION OF ALL FUNCTION CHECKS IAW MM. (K)