Aero Linx: Stearman Restorers Association The Stearman Restorers Association is an independent “Not for Profit” 501C-3 Corporation dedicated to the preservation, restoration, and safe flying of Stearman Aircraft through the education of both members and the public. We are passionate about all models of Stearman biplanes. The SRA has over 1500 members in 25 countries.