Sofema Aviation Services (SAS) www.sassofia.com considers the treatment of Articles created through the Technical Standard Order (TSO) process as well as the treatment of PMA articles. Introduction to FAA TSO A TSO is a minimum performance standard for specified materials, parts, and appliances used on civil aircraft. When authorized to manufacture a material, part, or appliances to a TSO standard, this is referred to as TSO authorization. Receiving a TSO authorization is both design and…

EASA Airworthiness Directives (AD’s) Considerations Presented by Sofema Aviation Services (SAS) www.sassofia.com Introduction Airworthiness Directives are issued by EASA, acting in accordance with the Basic Regulation on behalf of the European Community, its Member States, and of the European third countries that participate in the activities of EASA under Article 66 of that Regulation. In…

Considering the Difference Between EASA Minor & Major Changes – Sofema Aviation Services (SAS) www.sassofia.com reviews potential changes to Type Certificates (TC) and Supplemental Type Certificates (STC). Introduction When changes are needed to an airframe or onboard equipment, there are two options: To initiate a modification by the type design holder (manufacturer), To request a…