Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ and EMB-145XR Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-135BJ and Model EMB-145XR airplanes. This AD requires, for all airplanes, installation of an additional indication device to the clear-ice indication system. For certain airplanes, this AD requires replacing the existing clear-ice indication lamp with a new, improved lamp. For certain other airplanes, this AD also requires modifying certain electrical connections to add an indication device to the clear-ice indication system, removing a certain placard, and re- activating the clear-ice additional indicator lamp. The actions specified by this AD are intended to prevent undetected build-up of clear ice on the wing surfaces, which could lead to reduced controllability of the airplane. This action is intended to address the identified unsafe condition.