Abstract: A system for controlling the movement of an aircraft engine cowl door includes an actuator assembly having a housing and a screw shaft arranged at least partially within a hollow interior of the housing. The screw shaft is rotatable about an axis relative to the housing. A transmission system is coupled to the screw shaft to impart rotation to the screw shaft about the axis. A nut is engaged with the screw shaft and a piston rod having a rod end mounted thereto connects the nut to the cowl door of the engine. The nut is translatable relative to the screw shaft to transition the cowl door between a first position and a second position.