Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Beech Model 400A and 400T series airplanes, that currently requires an inspection of certain flap roller retention components to detect discrepant or missing parts; replacement of those parts; and installation of new washers on the roller attach bolts. This proposed action would require the replacement of certain previously-installed washers with new and stronger washers. It would also expand the applicability of the rule to include additional airplanes. This proposal is prompted by reports indicating that some locking tab washers on the roller attach bolt could fail, due to the absence of an inner tang. The actions specified by the proposed AD are intended to prevent the loss of roller attach nuts and the flap roller, which could result in the loss of a flap when the airplane is subject to load limit conditions, and, consequently lead to reduced controllability of the airplane.