Is the reason for the two fatal 737 Max accidents a flaw in the design of the airplane, making it prone to stall (compare with this post), which was compensated by a possibly over-reacting control system, which the pilots could not turn off? Did FAA authorise the plane without proper safety evaluation? Questions are piling up: FBI is joining criminal investigation, Wikipedia, Boeing, New York Times, Pilot training, Stability, Aviation expert, Kludge, Aviationcv, Pilots view.
Computational software used by developers of airplanes do not seem to allow simulation of the dynamics of stall and so the impact of stall on aircraft design and safety assessment must be done solely by expensive and time-consuming experiments in flight, and then also the design of the apparently needed control system. This may show to have been insufficient to make the plane safe, something which FAA did not have the capacity to check.
With our New Theory of Flight and new technology of Automated Computational Mathematical Modeling presented on this site (some references also collected here), the full flight of an airplane, like the 737 Max, including the full dynamics of stall, can accurately be computationally simulated as a unique capability shown in the HighLiftPW-3 Workshop, see also front page of Icarus Simulation. Such advanced technology could allow airplane makers better and faster simulations to design aircraft and assess their safety.