What was found
DURING AN INSTRUCTIONAL FLIGHT, WHILE PRACTICING STEEP TURNS, IT WAS NOTICED BY STUDENT AND INSTRUCTOR THAT THEY HAD NO UP ELEVATOR CONTROL BUT DID HAVE DOWN ELEVATOR CONTROL. THE AIRCRAFT RETURNED TO THE FIELD, KAZC AND THE INSTRUCTOR WAS ABLE TO MAKE AN UNEVENTFUL LANDING USING ELEVATOR TRIM CONTROL. VISUAL INSPECTION SHOWED THAT THE VERTICAL COMPONENT OF THE YOKE, WHICH PIVOTS JUST UNDER THE FLOOR AND IS ATTACHED TO THE ELEVATOR PUSH-PULL TUBE, WAS BROKEN JUST BELOW THE HINGE POINT AND EXHIBITED PROFUSE INTERNAL CORROSION PARTICLES.