Originally posted by: Mark
David, I agree with you on that. My understanding is the problem with the software is that they needed it in the first place. They were trying to compensate for an engine that is too large for the plane. I am not sure that is something software can fix. It doesn't seem like a smart business move trying to radically modify a 50-year old design rather than just starting with a clean sheet.
The 737 is the most successful airliner in history. I'm fairly sure that more 737s have been made than any other commercial aircraft. They are extremely useful for US domestic flights, given their range and load capacity.
I think that's one reason they tried to modify it rather than introducing a new design. The other reason is that getting a completely new design certified would take years, and all that would have to happen before they built a single one. In contrast, modifying an existing design takes a LOT less time and paperwork.
There's nothing inherently wrong with an older aircraft design. The military's SR-70s and B-52s are still flying. Heck, the DC-3/C-47 is still in use all around the world. It comes down to maintenance and the inherent strength and utility of the aircraft. I can't really blame Boeing for going with a modified design, given that the platform on which that modification was based has been so successful.
There definitely is a design flaw in the automated control system of the 737 MAX, in that it relies on the output of a single sensor. If that sensor malfunctions, the control system might make erroreous decisions. Boeing tried to allow for that by providing an INPUT ERRONEOUS warning light and stating a training procedure for pilots to compensate for that should it happen. The pilots in the two crashes apparently did try that procedure, but were unsuccessful.