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Alias Born | 01/11/2004 |
Monday, January 13, 2020 9:12:10 AM
I’m not a systems engineer and I don’t know exactly how MCAS interpreted the information from the AOA system.
However, the reason both aircraft crashed is that the MCAS system was not receiving information from the failed AOA sensor. It kept rolling in forward trim as a result of not getting this information. Of course this would have oversped the aircraft!
The pilots no doubt knew that somehow, the aircraft was being given incorrect inputs because it THOUGHT the aircraft was in a stall condition (stick shaker and trim driving the nose over). The pilots knew this because they could see the airspeed and angle of attack and they knew the aircraft WASN’T IN a stall configuration.
No matter thrust vectors and fancy terms. We’re both saying the same things. The cause of the crash was because the MCAS system caused an incorrect trim input (due to a failed sensor) to the elevator system. This input kept driving the nose of the aircraft down, even though the aircraft WAS NOT stalling.
The pilots couldn’t figure it out. In actuality, in ONE of the crashes, reports are that the pilot correctly disabled the MCAS system to regain control. But then he re-engaged the system a few minutes later and it eventually flew the aircraft into the ground.
Installation of separate and dual AOA sensors, and pilot training on the way the MCAS system operates (plus other changes which in probably not even aware of!) will cure this problem for the MAX aircraft.
I keep telling myself....deep breath....count to ten....try to answer without personal attack...if available, always try to present fact to back up your opinion.
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