Summary
This document proposes to adopt a new airworthiness directive (AD) that would apply to certain Jetstream Aircraft Limited (JAL) Models 3101 and 3201 airplanes. The proposed action would require 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 the proposed action. The actions specified in the proposed AD are intended to prevent failure of a diode in the central annunciator panel test button circuit, which, if not detected and corrected, could result in inadvertent engine shutdown while in flight if the central annunciator panel test button is pressed.