Which class rating would allow a maintenance organization to perform maintenance on Engines and APU?

The Class B rating is the appropriate classification that permits a maintenance organization to perform maintenance on Engines and Auxiliary Power Units (APUs). This rating indicates that the organization has been granted the necessary approval and meets the regulatory and safety standards required for such complex and critical systems.

Maintaining engines and APUs involves a high level of technical skill, specialized training, and adherence to stringent maintenance protocols to ensure safety and operational integrity. Class B certification ensures that the organization has met these requirements and is capable of handling the maintenance tasks related to these vital components of an aircraft.

The other class ratings do not specifically authorize maintenance on engines and APUs. Each class rating corresponds to the extent and type of maintenance an organization is allowed to perform, and only Class B encompasses the advanced and technical scope needed for these components.