re: Boeing sells first 737 max planes since deadly crashes with showstopper deal of 200 jets

Boeing added larger more fuel efficient engines that the airframe wasn't designed for, corrected for the aerodynamic hit in the flight control software logic, told the FAA this didn't effect the 737's current type certificate, and didn't mention or explicitly publish the change to the airline pilot community.

In other words, they did the same thing Airbus was heavily criticized for in the early days of its fly-by-wire control system, and still is today.

I'm a "if it ain't Boeing I ain't going" guy but whoever signed off on all this in a systems engineering sense should be shot. They fundamentally changed the way the plane reacted in some AoA conditions, and didn't disclose that.

If I were a commercial pilot, I would be very skeptical of Boeing's fix until they prove it in a) simulation and b) actual flight check rides.

That will be expensive but so are large airplanes running into the ground at high speed.