so what is different about MAX v NG?
Although is not sufficient information yet available to be certain what caused the crash, investigators’ attention is focused on that system, which can move the jet’s horizontal tail to pitch the nose up or down.John Cox, a former pilot and chief executive of aviation consultancy Safety Operating Systems, said that although a version of this automated system has been on the 737 since the first ones were built in 1967,
only on the MAX is this particular sensor able to trigger uncommanded movements of the jet’s horizontal tail.