The Problem Boeing Ran Into After Designing The 737 MAX For Bigger Engines … the Boeing 737 in cumulative sales. While the A320 has long … and gold standard for aircraft design and safety. But Boeing… leader in military aviation (it produced the F-15 Eagle), and … 737 1968 Airbus A320 1988 Embraer E-Jet 2004 Airbus A220 …