Airworthiness Directives; British Aerospace Model BAe 146 and Avro 146-RJ Series Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to all British Aerospace Model BAe 146 and Avro 146-RJ series airplanes, that requires installation of modified roller sub- assemblies in both the main landing gear (MLG) door lock and the MLG uplock. This amendment is prompted by issuance of mandatory continuing airworthiness information by a foreign civil airworthiness authority. The actions specified by this 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.