What was found
ON TAKEOFF, APPROXIMATELY AT 150 KNOTS SIGNIFICANT RIGHT RUDDER NEEDED TO MAINTAIN CONTROL. DURING CRUISE AFTER 1 HOUR OF FLIGHT, RUDDER RATION LIGHT BLINKED FOR ABOUT 15 MINUTES THEN WENT OUT. REMOVED AND REPLACED YAW DAMPER COMPUTER FOR PRECAUTIONARY COMPLETED UPPER AND LOWER YAW DAMPER COMPUTER INSTALLATION BYTE TEST PER MM 22-16-02 PAGE 401. ACCOMPLISHED YAW DAMPER CONFIDENCE OPERATIONAL TEST. REMOVED AND REPLACED RUDDER RATIO CONTROLLER IAW 27-21-12. (M)