What was found
AIRCRAFT WAS TAXING FROM THE GATE FOR TAKEOFF. THE NOSE WHEEL STEERING BECAME UNRESPONSIVE. AIRCRAFT RETURNED TO THE GATE AREA INSPECTION REVEALED THAT THE NOSE WHEEL STEERING JACK SHAFT HAD SHEARED AT THE ROD END ATTACH AREA THE JACK WAS REPLACED AND THE AIRCRAFT RETURNED TO SERVICE. AD RELATING TO THIS PART WERE COMPLIED WITH DURING OH. AD, LUB AND SHIMMING OF THE JACK WAS COMPLIED WITH. THE JACK IS LUBRICATED ON ALL ODD (B) CHECK INSPECTIONS. (K)