As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
IN CRUISE FLIGHT PILOT NOTICED A KICK IN THE FLIGHT CONTROLS AND A SLIGHT FLUCTUATION IN NR 2 HYDRAULIC GAUGE THIS WAS FOLLOWED BY CHATTERING IN THE CYCLIC CONTROL, AIRCRAFT RETURNED TO BASE AND UPON INSPECTION MECHANIC DISCOVERED THE NR 1 HYDRAULIC SYSTEM WAS LOW, SERVICED THE NR 1 HYDRAULIC SYSTEM AND AIRCRAFT WAS RETURNED TO SERVICE.