Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to certain Airbus Model A310 and A300-600 series airplanes, that would have required replacement of the rudder trim switch in the flight compartment with a new switch having a longer shaft; modification of wiring in panel 408VU; and replacement of the rudder trim control knob with a new knob, as necessary. This new action revises the proposed rule by requiring replacement of the control knob with an improved new knob. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this new proposed AD are intended to prevent inadvertent and uncommanded rudder trim activation, which could result in yaw and roll excursions and consequent reduced controllability of the airplane.