Adding to my post
Ethiopian airliner down in Africa
If we assume that pilots make such errors (as described in that study) regularly, then we might say that,
considering the overall high level of safety of commercial aerospace,
- we might conclude that the system is 'robust' enough to deal with such pilot errors,
- that airplanes might be so 'solid' that few situations arise that require the use of such checklists,
and,
that the question in these two cases would not be if errors were made (if they turn out to be real human errors or airplane induced errors), but why these errors may or may not have contributed to the chain of events that created two all fatal accidents,
The essence of aerospace accident investigation is not the apportioning of blame. We still have to go through the process of further fact finding, analysis, concluding, recommending. Now is not the time for blame ... yet ... I guess that those who want to should still be patient.