Originally Posted by
MechEngr
The 10 second time limit is for when a pilot ignores the increasing angle of attack and increasing control force and continues to pull the wheel farther back, It's not a full-shot on every excursion. A pilot should take the hint and stop pulling all the way to stall unless they are really dedicated to it because that mountain isn't budging or a plane has ignored the Tower and started to taxi across the active runway.
The accident aircraft problem was the AoA system failed and provided ridiculously large values and the pilots were unknowingly provoking it further. Had the AoA system been accurate, none of this would be happening today.
Which leaves the question - is the greater blame for an instrument that generates false information or for a user of that data, like the stick-shaker and MCAS and airspeed and the pilots, which believes it? Unfortunately the aviation industry has long accepted that some planes will generate false AoA data and pilots will be forced to go through checklists to realize it's a false alarm.
The blame is in the user of the data, a user of the data should have a data validation, which is what Boeing is working for MCAS. You are also putting on the same level warnings (stick shaker and air speed) with the MCAS which actuates a flight control. In case of MCAS is not a false alarm!