All of this is my opinion. Without prejudice.

There have been two recent and fatal air crashes of a specific model of plane.

Here is what I think is the problem.

The plane was made more efficient (no problem) and similar in cockpit controls to its predecessor (almost no problem.)

So a crew used to the older plane could fly the new one.

Except for one small difference.

When the plane thinks its airspeed is too slow, it dives to avoid a stall.

On the older plane, the pilot (or co-pilot) pulled...