[rustymonday]

Maybe I'd buy that if the exact same thing didn't happen 5 months later with Ethiopian Airlines Flight 302. Most of the blame has to be on Boeing.

[WalterBright]

The EA crew did not follow the 2 step procedure in the Emergency Airworthiness Directive given to all MAX crews before the EA crash.

Also, before the LA crash, the MCAS failure happened on the previous flight of the same aircraft, and the crew just turned off the stab trim, and continued the flight normally and landed safely. That crew was unaware of MCAS, but they followed standard runaway trim emergency procedure.