Technical Standard Order Authorization
A Technical Standard Order Authorization – TSOA from the Federal Aviation Administration authorizes a manufacturer to produce a material, part, or appliance to a TSO standard. Receiving a TSOA approves both design and production of the TSO part.
A TSOA does not authorize the installation of a TSO part in a certificated aircraft. The standard procedures for the installation or modification of an aircraft must be followed such as a STC, field approval, etc.