 The SJ30 program was the first aircraft program to successfully petition for and gain approval to certify as a Part 23 Commuter Category jet.In 1996 Sino Swearingen petitioned to certify as a Commuter Category aircraft arguing that it was as safe, or safer than the current Part 23 Commuter Category aircraft.At the time only the Fairchild Metro 23 and the Beechcraft 1900D had been certified under these rules.