Airworthiness Directives; Jetstream Aircraft Limited (Formerly British Aerospace, Regional Aircraft Limited) Jetstream Models 3101 and 3201 Airplanes

This amendment adopts a new airworthiness directive (AD) that applies to Jetstream Aircraft Limited (JAL) Jetstream Models 3101 and 3201 airplanes.This action requires inspecting the main passenger/crew door locking mechanism to ensure that a taper pin is installed, installing a taper pin if not already installed, and modifying the passenger door warning system. The actions specified by this AD are intended to prevent the inability to open the passenger/crew door or failure of the passenger door warning system, which could result in passenger injury if emergency evacuation is needed.