As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNCOMMANDED RUDDER MOVEMENTS IN FLIGHT BOTH TO THE LT & RT WITH & WITHOUT YAW DAMPER ENGAGED. TRANSFERRED TO NRWC 524-ABI-01793. R & R NR 1 YAW DAMPER ACTUATOR IAW AMM 22-22-01. SEE NRWC 524-ABI-01793 FOR DETAILS. ACTUATOR, LIN, YAW DAMP PN 822-1308-320 & SN 1CWLJ.