This Aerospace Information Report (AIR) is intended to assist the user (aircraft manufacturer/airline) in the following areas: a. In the decision of whether or not to plan for the installation of a powered drive system in the cargo loading system (CLS) during the definition of the aircraft on-board cargo loading system; b. If a powered drive system is decided upong, to provide general requirements to be considered during the preparation of component specifications for the powered drive units (PDUs) to be used. This provides a selection of criteria in order to obtain an optimum component PDU the application considered.