AD 2005-08-05 Amendment 39-14057

The FAA is adopting a new airworthiness directive (AD) for all BAE Systems (Operations) Limited (Jetstream) Model 4101 airplanes. This AD requires replacing the aileron trim chain with a new, improved aileron trim chain, and modifying the installation of the aileron trim chain. This AD is prompted by a report that the aileron trim cables were connected incorrectly on a correctly installed aileron trim chain. We are issuing this AD to prevent incorrect connection of the aileron trim cables, which could result in failure of the aileron trim system and consequent reduced controllability of the airplane.