What was found
YAW DAMPER SWERVED AIRCRAFT, RETURNED TO MIAMI. YAW DAMPER AT 37,000, SEVERE INFLIGHT UPSET, LEFT DEFLECTION. ACCOMPLISHED WIRING CONTINUITY AND INTEGRITY CHECK OF THE TRANSFER VALVE AND POSITION SENSOR FROM YAW CHANNEL TO RUDDER PACKAGE. REPLACED YAW COMPUTER AND ACCOMPLISHED A/P BITE TEST IAW MM 22-1-00, OPS CHECKED NORMAL.