The FAA’s new advisory circular covering type, production, and airworthiness certification of powered-lift aircraft (AC 21.17-4) has been widely welcomed among companies aiming to launch new eVTOL vehicles. Released on July 18, the document landed more than halfway into the year in which several of the advanced air mobility sector’s frontrunners have been aiming to complete U.S. certification, ending several years of uncertainty around the regulatory landscape.
While the agency’s long-awaited initiative doesn’t guarantee certifications will now be completed in short order, it does at least appear to clear a path to the finish line for what is set to be the first new class of aircraft since the first half of the 20th century. It applies to powered-lift, battery-electric aircraft being certified under Part 21.17 (b) rules weighing no more than 12,500 pounds and carrying six or fewer passengers.