CHI85IA042

During a preflt, just prior to takeoff, the plt checked the flt controls & full travel of the controls was achieved. He initiated the takeoff, but when he applied back pressure on the elevator control, it would only move about 1 inch. He aborted the takeoff without further incident. An exam of the acft revealed the ribbon wire, pn 1570308-1, for the control yoke electrical switches became jammed under the control column bearings & restricted the yoke movement. An excessive amount of slack in the wire was noted. A Cessna service letter, SE79-26, regarding 1978 & 1979 Cessna 210 & P210 models addressed this problem, but was not applicable to previous models. N21YF was a 1974 Cessna T2101. Starting in 1980, guides were installed at the factory. When removed, the ribbon wire was 33' long & was split for use in the 1974 acft. The replacement ribbon wire was 45' long, was not split & was made for use in several models of Cessna acft. The service manual had no instructions for installation except for a diagram.