As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
UNCOMMANDED RT AND LT YAW AFTER TAKEOFF. SWITCHED YAW DAMPER TO THE 'OFF' POSITION AND YAWING STOPPED. MAINTENANCE FOUND A BROKEN WIRE IN THE D4117J ELECTRICAL CONNECTOR AT THE FORWARD END OF THE E1 EQUIPMENT RACK FOR THE AUTOPILOT ACCESSORY UNIT. THE WIRE WAS REPAIRED IAW B737-22-120. SYSTEM CHECKED OK.