As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) CREW REPORTED UNCOMMANDED YAW OSCILLATIONS IN FLIGHT, QRH PROCEDURES FOLLOWED AND WAY DAMPERS DISENGAGED BUT OSCULLATIONS CONTINUED. ADJUSTING RUDDER TRIM TENDED TO INCREASE OSCILLATIONS. THE ACFT LANDED WITHOUT EVENT. MAINT. REPLACED THE FCP, BOTH YAW DAMPERS ACTUATORS & BOTH RTL ACTUATORS.