"Boeing’s design and development of the 737 MAX was marred by technical design failures, lack of transparency with both regulators and customers, and efforts to obfuscate information about the operation of the aircraft. During development of the 737 MAX, Boeing engineers raised safety concerns about MCAS being tied to a single AOA sensor. Another Boeing engineer raised concerns about not having a synthetic airspeed sensor on the 737 MAX. In the wake of the Lion Air and Ethiopian Airlines tragedies, Boeing has now acknowledged some of these issues by planning to have two AOA sensors feed into MCAS, for instance. In January 2020, despite the fact that Boeing’s internal directive for the 737 MAX program made crystal clear that nothing should jeopardize Level B non-simul