Hi everyone, my name is Jin, and today I am going to introduce why Boeing 737 Max 8 crashed. A few weeks ago, I saw a news from the internet version of The New York Times, and the topic was The Dangerous Flaws in Boeing's Automated System.
Last October, Lion Air's Boeing 737 Max 8 crashed. And in May, Ethiopian Air's Boeing 737 Max 8 crashed, too. This became the topic that everyone talks about, but still not everyone knows why exactly Boeing 737 Max 8 crashed?
A normal airplane will raise about two to three degrees, Boeing 737 Max 8's engine is a bit higher than the original 737, and its aerodynamics would cause it to raise to even 10 degrees. There is a system called MCAS, and MCAS will push the plane back to normal angle.
There are two attack angle sensors on the 737 Max 8, but they only used one, which is considered a bad design. After the investigation, Boeing said the attack angle sensor gave the wrong information, which is about 20 degrees larger than the actual number. Therefore, MCAS pushed the plane down.
The pilot noticed the unusual sink, so they raised the plane again, which again is counteracted by MCAS. Even though the pilot wanted to disengage MCAS, it just can't be turned off. It became a tug of war.
At last, MCAS pushed the plane down to over 40 degrees, so the plane began to fall down, and it crashed.
The reason why Boeing 737 Max 8 crashed is because the attack angle sensor sent the wrong data, and MCAS can't be disengaged, so this is why Boeing 737 Max 8 crashed.
I wish you like my news report. Thank you very much.
