What was found
UNCOMMANDED YAW AT FL210, INITIAL ROLL TO THE RIGHT THEN PULSED BACK AND FORTH GENTLY. RAN IAC AND QRH, PROBLEM DISCONTINUED WHEN YAW DAMPER DISCONNECTED
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
UNCOMMANDED YAW AT FL210, INITIAL ROLL TO THE RIGHT THEN PULSED BACK AND FORTH GENTLY. RAN IAC AND QRH, PROBLEM DISCONTINUED WHEN YAW DAMPER DISCONNECTED