After the various forms of the 601 came the Bombardier Challenger 604. It offers basic performance improvements and similar cabin layouts but with updated luxury and style.Eight to twelve passengers will appreciate the large leather seats, low cabin noise, and stand-up space. Seating can be configured for as many as 19, with a variety of club-seating and divan arrangements available. The Challenger 604 has seven windows on each side of the cabin. There is also a full service galley and spacious enclosed lavatory aboard, and the baggage compartments are accessible during flight.The Challenger 604’s transcontinental range and brilliant performance are facilitated by two General Electric CF34-3B turbofan engines. Changes from the 601 include a stronger undercarriage to accommodate higher weights, a new fuel distribution system, and greater fuel capacity. The aircraft also comes with an updated glass cockpit which uses a Rockwell Collins Pro Line 4 avionics suite with large electronic flight instrumentation system (EFIS) displays.