Summary
This document proposes the supersedure of an existing airworthiness directive (AD), applicable to certain Airbus Model A320 series airplanes, that currently requires modification of the trimmable horizontal stabilizer (THS). This action would add requirements for a one-time inspection of the flexible hoses of the elevator return lines on the THS to detect installation of incorrect clamps, or missing clamps or bonding leads; and for replacement of the clamps or bonding leads with new parts, if necessary. This proposal is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by the proposed AD are intended to prevent leakage from hydraulic pipe fittings in the THS, which could result in failure of the THS and consequent reduced controllability of the airplane.