Originally Posted by
EDLB
So why got the Boeing decision making process into a complicated and questionable complex/ unreliable software solution, instead of an aerodynamic solution?
This is nearly identical to the solution that the Speed Trim System (STS) provides with no notable problems. The first crew to encounter the adverse behavior commented that they thought STS was running backwards. Notable is that MCAS operated exactly as it was specified to operate - the ADIRU did not. To my way of thinking MCAS exposed a number of really bad decisions that should have been corrected decades earlier, including suppliers who were able to supply mis-calibrated AoA sensors due to a single switch on a multifunction test box (crash 1.)