As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) DURING FLIGHT THE PILOT FELT A RELEASE OF PRESSURE IN THE CYCLIC CONTROL AS HE WAS APPLYING PRESSURE AND TRIMMING THE CYCLIC AFT. AFTERWARDS HE WAS UNABLE TO ACTIVATE THE LONGITUDINAL TRIM ACTUATOR. HE FLEW BACK TO BASE AND UPON EXAMINATION OF THE TRIM ACTUATOR FOUND THE JACKSHAFT BROKEN IN HALF. THE ACTUATOR WAS REPLACED.