[WalterBright]

It is the pilots' responsibility to READ, UNDERSTAND, REMEMBER and FOLLOW any Emergency Airworthiness Directives sent to them. Flying an airplane is not a joke. Pilots who are unwilling to do this should turn in their pilots' wings.

Crashes are usually due to a combination of factors. Boeing certainly shares considerable blame for the poorly designed MCAS system.

More issues:

1. how did a defective AOA sensor get past checks and be installed?

2. how did a defective AOA sensor pass inspection tests on the airplane?

3. why was the LA flight allowed to fly, when the previous flight experienced stab trim runaway?

4. why was the LA flight crew not informed of the anomalous behavior on the prior flight?

Air travel is made safe by addressing all factors that led to an accident.