Regulacje i polityka gospodarcza · 23.10.1996

Airworthiness Directives; Jetstream Model 4101 Airplanes

This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Jetstream Model 4101 airplanes, that currently requires a one-time inspection of the airplane records to determine the serial number, the total number of hours time-in-service accumulated, and the date of installation of the yaw damper servo in the autopilot system; and to determine the date of installation of a particular kit, if installed. That AD also requires removing and replacing the yaw damper servo, or rendering the yaw damper servo inoperative. The actions specified by that AD are intended to prevent overheat failure of the Flight Control Computer (FCC), which could result in smoke in the flight deck that could inhibit the ability of the flightcrew to safely operate and land the airplane. This action would require installation of circuit breakers on the avionics relay panel, which, when accomplished, would constitute terminating action for the previous requirements of the AD.