Lion Air Flight Data Recorder Simulation of Crash

[howdy]

This is the last 140 seconds prior to the aircraft impacting the water. This was feed into a simulator and this is the result.

[rotor]

Hard to interpret anything. Sudden noseover. Stall? Forceful suicide dive? No airspeed listed. This by itself as a video without numerical data doesn't help.

[philip964]

Forceful suicide dive to me. But I know nothing.

Seems to return to normal flight, like on auto pilot after each sudden dive. Fighting in cockpit?

[howdy]

This was a flight computer malfunction. Boeing failed to tell the operator's that the 737Max had this computer installed. The pilots had no control of the plane. This is not going to go well for Boeing.

[C-dub]

Wow! That wasn't just a nose over. If I'm looking at that correctly, it was inverted.

Anyone else ever watch the television show about Air Disasters? I think I remember one of them being similar to this, except for being inverted, being due to the auto-pilot altitude being set at zero feet. When the pilots engaged it the plane did not have enough altitude to recover from the steep power nose dive.

[RoyGBiv]

As a frequent flyer, that recreation made my stomach turn.

[The Annoyed Man]

How is it that this is the first time I'm hearing of this crash? 189 pax + crew is a lot of people, and yet I heard nothing about it on the news.....which may be my fault since I've been kind of avoiding it for a while now.

[C-dub]

How is it that this is the first time I'm hearing of this crash? 189 pax + crew is a lot of people, and yet I heard nothing about it on the news.....which may be my fault since I've been kind of avoiding it for a while now.

It was big news for a couple of days. They found the wreckage pretty quick and then the fires started in Cali and the news moved on to those.

[Gator Guy]

How is it that this is the first time I'm hearing of this crash? 189 pax + crew is a lot of people, and yet I heard nothing about it on the news.....which may be my fault since I've been kind of avoiding it for a while now.

It was big news for a couple of days. They found the wreckage pretty quick and then the fires started in Cali and the news moved on to those.

Also it was in Indonesia. It probably got more coverage locally and regionally, lika a plane crash in Montana would get more coverage in the United States than in Asia.

[Charles L. Cotton]

Anyone else ever watch the television show about Air Disasters? I think I remember one of them being similar to this, except for being inverted, being due to the auto-pilot altitude being set at zero feet. When the pilots engaged it the plane did not have enough altitude to recover from the steep power nose dive.

I never missed an episode. I find it fascinating that the NTSB investigators can ever determine what caused most crashes. People who know I'm a pilot (well, I used to fly) can't believe I'm interested in such programs, but they are educational. It's like reading/watching AOPA's Safety Foundation accident reviews.

I recall the episode you mentioned.

If howdy hadn't posted about the flight computer, I would have guessed it was two pilots fighting over the controls with the suicidal one winning. That happen on a FedEx flight, but the good guys one.
Chas.

[K.Mooneyham]

This was a flight computer malfunction. Boeing failed to tell the operator's that the 737Max had this computer installed. The pilots had no control of the plane. This is not going to go well for Boeing.

I work on aircraft avionics systems, as well as doing some mechanic duties, for a living. As soon as I saw the first un-commanded pitch incident, I immediately thought "autopilot or flight control system". So, you're saying this is a known issue? Wow, messed up in the extreme. I'm surprised there hasn't been an AD issued by the FAA, or a SB from Boeing.

[howdy]

Here is an article about the crash.

https://www.nytimes.com/2018/11/09/worl ... h-610.html

"The Federal Aviation Administration on Wednesday issued an emergency airworthiness directive saying analysis done by Boeing showed if an “erroneously high” angle of attack sensor reading was fed into the flight control system, it could cause the plane to dive, make it difficult for the crew to control the airplane and lead to “impact with terrain.”

[C-dub]

I don’t think there has been any determination of a cause for this flight yet.

That Air Disaster show is very interesting.

[PriestTheRunner]

The preliminary conclusion was that the anti-stall malfunctioned and forced the nose down in an attempt to "prevent a stall". Obviously it was malfunctioning as the plane was not at a steep angle of attack to the horizon and had decent airspeed.

The computer forced the plane to go back to 'level' or dive to increase airspeed and prevent a stall, but really just dove the plane into the drink...

Most recent info on cause:
https://www.seattletimes.com/business/b ... air-crash/
https://www.cnn.com/2018/11/18/americas ... index.html
https://www.nytimes.com/2018/11/09/worl ... h-610.html

[mayor]

Just one more reason on my list for not flying - ever.