Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to all Dornier Model 328-100 series airplanes, that would have required repetitive lubrication of the engine control push-pull cables. That proposal was prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. This new action revises the proposed rule by adding a requirement to install heating tubes on the control cables in the cockpit area and in the left-hand and right-hand engine balconies, which would terminate the repetitive lubrication requirement. The actions specified by this new proposed AD are intended to prevent ice from building up on the engine control push-pull cables, which could result in friction or jamming of the engine controls, and consequent reduced controllability of the airplane.