Our engineering and certification expertise are second to none. The ADS team has an in-depth understanding of Supplemental Type Certificates (STC), Repair Design Approvals (RDA), and Technical Standard Orders (TSO). We have years of experience ensuring compliance with TCCA, FAA, EASA and other aviation authority regulations to help get you where you need to be. Owners and operators of all kinds commercial (airlines and regional airlines), business, special missions, and rotary wing trust us for effective certification and engineering services. Avionics manufacturers of all types rely on our expertise. We offer a wide range of services and over the past 25 years, we’ve practically seen it all.