As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNCOMMANDED LARGE RUDDER DEFLECTION CAUSING LARGE YAWING MOMENT IN CRUISE AND ON APPROACH. AP ENGAGEMENT MADE NO DIFFERENCE. (ENROUTE, ACFT DIVERTED TO DUE TO MX -- EMERGENCY DECLARED) R & R LT AND RT YAW DAMPERS IAW AMM CH 22-22-01-000-801. PERFROMED OPS TEST IAW AMM CH 22-22-01-710-802. OPS CHECKED GOOD AT THIS TIME. PERFORMED AN OPS TEST OF RUDDER CONTROL SYS IAW AMM 27-21-00. NO DEFECTS NOTED. (CLOSED)