Boeing 717 TWA airplane model. The Boeing 717-200 is the world's best jetliner specifically designed for the short-haul, high-frequency 100-passenger airline market. The new twinjet makes effective use of today's technology to lower operating costs, and it offers breakthrough simplicity, reduced noise and emissions, and big-jet comfort. The 717 is designed to meet replacement and expansion needs in the 100-seat category, projected at approximately 3,000 airplanes. Final assembly of the 717 takes place on a unique moving production line at the Boeing facility in Long Beach, Calif.