AC (Advisory Circular)

An Advisory Circular (AC) is a document issued by aviation authorities, like the Federal Aviation Administration (FAA), to provide guidance, information, and recommendations to the aviation community. ACs help clarify regulations, outline best practices, and offer technical advice on various topics, such as safety procedures and operational standards. While they are not legally binding, following the recommendations in an AC can enhance safety and compliance in aviation operations. Essentially, ACs serve to inform and assist pilots, airlines, and other stakeholders in understanding and implementing aviation rules and practices effectively.