As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
FLIGHT 3771, 3990, 3763 INTERMITTENT UNCOMMANDED YAW MOTION IN CRUISE FLIGHT WITH AUTO PILOT ON OR OFF. YD1 DISCONNECTED SEVERAL TIMES BUT NOT DURING UNCOMMANDED YAW MOTION. R & R YAW DAMP ACTUATOR IAW AMM 22-22-01. OPERATIONS CHECKED GOOD.