What was found
PILOTS REPORTED THAT THE YAW DAMPER, WHEN ENGAGED, THE BALL WAS WAY OUT TO THE LEFT, WHEN DISENGAGED HAD TO RETRIM ACFT, WHEN ENGAGED SECONDARY YAW DAMPER WITH SAME RESULTS, DISENGAGED AGAIN TRIMMED ACFT AND ENGAGED AUTO PILOT WITH THE AUTO PILOT AND NOTICED A ROLLING ACTION. ELECTED TO RETURN TO DEPARTURE AND LAND. LANDING WAS COMPLETED WITH NO ISSUES.