Summary
This document revises an earlier proposed airworthiness directive (AD), applicable to certain Airbus Model A330 and A340 series airplanes, that would have required modification of the down drive brackets of the left- and right-hand sides of the inboard flap track 1 assembly and installation of bigger bolts and washers. This new action revises the proposed AD by expanding the applicability and, for certain airplanes, adding improved torque requirements specifying the correct torque value of the nuts. The actions specified by this new proposed AD are intended to prevent failure of the bolts due to flexural loads caused by transmission jam loading, which could lead to a "flap-locked" condition, causing reduced controllability of the airplane. This action is intended to address the identified unsafe condition.