The following Thread is from a post sent to me by a friend (so sharing as received) but I have fact-checked it with a Pilot friend as valid. It helps to explain what MAY have happened with d Ethiopian that crashed & killed many innocents.
The sensor's job is to tell the computer the angle the plane is flying at. And if the AOA of the plane is too high, this will result in d plane stalling. Typically the AOA is below 15 to 20 degrees
With this flight, d Alpha Vane sensor measuring d AOA on d Captain's side was reported to be faulty. So they changed it. Same was reported from d equally harrowing flight fr Bali
And once in the air, d faulty sensor told d computer that d plane is stalling. The computer then, without d pilot ever knowing pushed d nose of d plane down further, while the pilot was trying to raise the plane.
This is d initial verdict of what happened & why nations are banning d plane until further notice
As Boeing grounds entire crash aircraft fleet worldwide...
The US plane-maker said it would suspend all 371 of the aircraft.... MORE WILL BE REVEALED IN THE WEEKS AHEAD I AM SURE.