What was found
(CAN) IN FLIGHT THE RUDDER WAS FLUTTERING. FLUTTER INCREASED WITH INCREASE IN SPEED AND ALTITUDE. YAW DAMPER REMAINED ENGAGED. CORRECTIVE ACTION: REMOVED AND REPLACED #1 AND #2 YAW DAMPER ACTUATOR. (TC# 20190628004)
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) IN FLIGHT THE RUDDER WAS FLUTTERING. FLUTTER INCREASED WITH INCREASE IN SPEED AND ALTITUDE. YAW DAMPER REMAINED ENGAGED. CORRECTIVE ACTION: REMOVED AND REPLACED #1 AND #2 YAW DAMPER ACTUATOR. (TC# 20190628004)