This document recommends criteria for the design and installation of Autopilot, Flight Director and Autothrust Systems. These three systems are highly interrelated and will be referred to generically as an Integrated Flight Guidance System (IFGS).
SAE ARP5366-2017 history
2017SAE ARP5366-2017 Autopilot, Flight Director, and Autothrust Systems
2001SAE ARP5366-2001 Autopilot, Flight Director, and Autothrust Systems