Summary
This document proposes the adoption of a new airworthiness directive (AD) that is applicable to all British Aerospace model BAe 146 and Avro 146-RJ series airplanes. This proposal would require installation of modified roller sub-assemblies in both the main landing gear (MLG) door lock and the MLG uplock. 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 failure of the roller sub-assemblies, which could result in failure of the MLG to retract and lock after takeoff, or to deploy properly for landing.