As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING HYD TEST CYCLIC WENT HARD OVER LT WITHOUT CONTROL INPUT. WHEN HYD FLUID WAS WARM HARD OVER WAS LESS NOTICEABLE. WHEN HYD SYSTEM PRESSURE WAS DUMPED, CYCLIC WENT HARD OVER LT. HYD SERVO REPLACED, AIRCRAFT WAS RETURNED TO SERVICE.