 The SJ30 program was the first to fly both the Williams FJ44-1 and FJ44-2A engine and was instrumental in developing the engines with Williams International.Subsequent incorporation of the engines at Cessna and Raytheon led to their CitationJet and Premier aircraft, respectively.In keeping with Ed Swearingen’s vision of a better light jet, the SJ30 was the first aircraft designed around a 12 psi cabin for more comfort in the cabin.