SAE AS406A

This document has been declared "Stabilized" and will no longer be subjected to periodic reviews for currency. Users are responsible for verifying references and continued suitability or technical requirements. New technology may exist.

This document has been declared NONCURRENT. It is recommended, therefore, that this document not be specified for new designs. NONCURRENT refers to those documents which have previously been widely referenced and may continue to be required on some existing designs.

This standard establishes the essential minimum safe performance requirements for flight director instruments, primarily for use with turbine-powered transport aircraft, the operation of which may subject the instruments to the environmental conditions specified in paragraph 3.3. This standard covers flight directors for use on aircraft to indicate to the pilot, by visual means, the correct control application for the operation of an aircraft in accordance with a preselected flight plan.