What was found
THE NOSE GEAR LOCKED UP IN 90 DEGREE POSITION AFTER TAKING RUNWAY AND CREW WAS UNABLE TO STEER AIRCRAFT. THE AIRCRAFT WAS TOWED BACK TO THE GATE. MAINTENANCE FOUND THE NOSE GEAR LT STEERING ACTUATOR ROD END STRIPPED. THE NOSE GEAR LT STEERING ACTUATOR WAS REMOVED AND REPLACED. THE RT STEERING ACTUATOR AND METERING VALVE WERE REPLACED AS A PRECAUTIONARY MEASURE. AN OPERATIONAL CHECK AND TEST OF THE STEERING SYSTEM WAS PERFORMED IAW MM 32-51-21 AND THE SYSTEM CHECKED GOOD WITH NO LEAKS NOTED.