Airworthiness Directives; BAE Systems (Operations) Limited Model BAe 146 Series Airplanes and Avro 146-RJ Series Airplanes

This amendment adopts a new airworthiness directive (AD), applicable to certain BAE Systems (Operations) Limited Model BAe 146 series airplanes and Avro 146-RJ series airplanes, that requires replacement of the standby generator with a new, improved standby generator. This amendment is prompted by mandatory continuing airworthiness information from a foreign airworthiness authority. This action is necessary to prevent loss of the standby generator, which, in the event of an emergency involving the principal generator, could result in the loss of electrical power to the airplane. This action is intended to address the identified unsafe condition.