Airworthiness Directives; Jetstream Aircraft Limited Jetstream Models 3101 and 3201 Airplanes

This amendment adopts a new airworthiness directive (AD) that applies to certain Jetstream Aircraft Limited (JAL) Jetstream Models 3101 and 3201 airplanes. This action requires modifying the central annunciator panel test button circuit. A report of diode failure in this circuit and subsequent inadvertent engine shutdown on one of the affected airplanes prompted this action. The actions specified by this AD are intended to prevent failure of a diode in the central annunciator panel test button circuit, which could result in inadvertent engine shutdown while in flight if the central annunciator panel test button is pressed.