So what was the reason? I don’t feel like watching a damned video when 50 words is sufficient.
nothing new, the software doomed the plane. the sensors which feed the computer were faulty too. Amd the pilots weren’t trained on the nee software. imagine takingvyou car in for a manufactures software safety recall upgrade. as you are driving home the car starts speeding up when you take the foot of the gas the car keeps speeding up. you hit the brakes and they slow the car but it still sppeds up . these planes nosed down to prevent what thee sensors thought was a stall condition. computer drove the plane into the ground..
My summary (not that I necessarily agree with the the explanation):
A new larger engine was designed to be put on the old Boeing 737 plane design. It was too large to be installed below the wing’s surface of the Boeing 737 Max 8, but Boeing moved it up higher and part of it was above the wing surface. This sometimes caused the nose of the plan to point too high at takeoff and risked stalling out the plane.
To compensate, Boeing installed a software system to push the nose down to prevent it from stalling out by rising too high. It was called the Maneuvering Characteristics Augmentation System or MCAS.
Because the basic 737 plane itself was not changed all that much, Boeing did not highlight the new MCAS and pilots only got two-hour iPad training on the new plane before entering the cockpit the first time. And the training material didn’t mentioned the MCAS software.
On October 29, 2018 Lion Air flight 610 took off from Jakarta Indonesia, and had trouble with the nose frequently turning down — this was presumably caused by the MCAS software. The pilots could not figure out what was causing it and how to stop it. The plane was getting incorrect sensor data that caused this and it crashed 12 minutes after take off.
In the case of Ethiopian Airlines Flight 302 on March 10. 2019, after the flight took off the pilots disabled the MCAS system because it was causing the nose of the plane to tilt down. But it was too late. It crashed.
The narrator claims Boeing was so eager to beat Airbus they were negligent in design and training on the new engine and MCAS software and the FAA was negligent in approving the design. Airbus had built a larger engine that was more fuel efficient. But because its Airbus A320 model was higher off the ground than Boeing’s 737, there was room on the Airbus for the larger engine to hang under neat the wing as its smaller engine was able to do on the old model.
“This video explains really well. “
Stopped watching as the video is WRONG on why the MCAS was installed.
Those Planes need to be recalled permanently and Boeing swamp drained.
The active angle of attack sensor was sheared off, they think bird strike. If the video doesn’t mention that it’s not worth watching.
That information was from Aviation Week two weeks ago.
Plus they ran the engines at 98% of takeoff power, never backed them off.
But, of course, that isn't enough to conclude that what is presented in the video is a truly accurate statement on the problem. It is just one video and for all we know the case made in the video was developed directly or indirectly by Airbus.
In other words, the case presented in the video may be the gospel truth...or it may not be.
If I managed an investment portfolio which contained a big chuck of Boeing, I would send that video ASAP to my top analyist and ask him to get an opinion from several of the best aerospace engineers who are familiar with this situation.
We don't have that luxury but the stock market will tell us shortly if new dire conclusions have been reached.
This is the moment before the Ethiopian Flight 409 Boeing 737-800 Max crash... The people in the car are just driving along the highway & caught everything on film... Click on video below. ....
I watched the film which was very detailed but could not find it elsewhere; possibly a doctored film of another plane crash since this passenger jet crashed in a flat angle and not in the straight down dive as mentioned in the reports.
I cant get the url for this film/
Anyone else see it? - Tom
No new news there. It’s also quite biased in the way it reports the facts and which facts it chooses to report.
This plane could only have reached airworthiness certification with single sensor input allowing override of pilot input, is that the FAA and Boeing are utterly incompetent up and down their organizations... which I do not believe... or Folks within Boeing and the FAA used green lubricant and chronic capitalism to get this thing in the air.
A very sad thing is that the MCAS has no off switch. The only way to stop if from controlling the plane was to cut power to the electric motors that run the trim. However doing that also means that you can’t use the electric manual controls mounted on the Yoke. So the pilots were never able to gain manual control of the planes trim. Full mechanical manual control was not an option due to the forces at work.
It appears that the fatal moment came when the pilots restored power to the electric trim motors(in an attempt to regain use of the yoke controls), and the MCAS system was then able to instantly put the plane into its unrecoverable fatal dive. It had actually never stopped trying to crash the plane, as the data log shows. MCAS had no idea if it had control of the motors or not.
So they in the process of make several changes to the software. All of which should have been in place to begin with. I think those changes will help a lot, but I believe that the software will still be lacking certain types of error checking, and suicide prevention calculations. But at least it will be much more difficult for MCAS to remain on line if there are problems.
The fact is that this software was not fit to run a coke machine, let alone an airplane.
Here's the deal. Every pilot is trained in what to do for a runaway stabilizer condition. If you see the stabilizer acting strangely, you grab the stabilizer adjustment wheels and stop them from turning. You cut power, and then you manually dial the horizontal stabilizer trim back to a functional level.
What both groups of pilots did was to wait too long to try to disable the automatic controls. Had they reacted quickly, the planes would not have crashed. By the time they reacted, there was too much force on the Horizontal Stabilizer to move the trim wheels.
Bad sensors combined with not particularly good software, combined with supposedly trained pilots who did not react quickly enough to a runaway stabilizer condition.
No one has done a better job than this guy on telling us about this crash.
737 Max UPDATE 14 April 2019 “The Fix”
https://www.youtube.com/watch?v=zGM0V7zEKEQ
It’s the punitive damages that will put Boeing under as they file bankruptcy. They were too cheap to address the real problem.
I rode in a 737-900 a couple of years ago. I liked it.
"IMO, the chain of decision leading to the current MCAS design was something like:
Up to this point, everything is cool. If things had been left at that, MAX would have been as safe as NG. Even marginally safer, in the vast majority of the flight envelope and, with an operative MCAS, across 100% of the envelope.
Note: switching only STAB TRIM CUTOFF AUTO-PILOT to CUTOFF while leaving STAB TRIM CUTOFF MAIN ELECT to NORMAL would have disabled all automations while leaving the electrical stab trim servo operative, to help pilots cope with aero loads on the stabilizer via thumb switches. Both Lion Air and Ethiopian crashes could easily have been avoided.
Enter the bad guy (circa 2011): the commercial imperative to avoid simulator training at all costs. Clients are clamoring for minimal transitions costs, and an over-eager sales manager, desperate to secure a mega-order out of Airbus hands, has promised to SW a 1M$/plane discount if any simulator training will be needed. That's a 280M$ penalty at stake. Who's gonna pay that kind of money, you? Then back to the design table and make that training requirement go away. Pronto: flight testing is just a few years away.
Conjecture, yes, but IMO its chillingly fits.
My Norton is blocking the web site. Anyone else?
I hate flying.
Nothing new, narrated in a cream puff voice.