Airworthiness Directives; Empresa Brasileira de Aeronautica S.A. (EMBRAER) Model EMB-145 Series Airplanes

This amendment adopts a new airworthiness directive (AD) that is applicable to certain EMBRAER Model EMB-145 series airplanes. This action requires draining and sealing of the ground spoiler and speed brake actuators. This action also requires replacement of the spoiler actuator assembly and the speed brake actuator assembly with modified actuator assemblies. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified in this AD are intended to prevent asymmetric deployment of the speed brakes during flight and consequent reduced controllability of the airplane; or failure of the ground spoilers to deploy during landing or rejected takeoff, which could result in increased aircraft stopping distances.