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Boeing 737 MAX Crashes and Grounding News

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  1. #1

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    Boeing 737 MAX Crashes and Grounding News

    Boeing 737-800 MAX seems to be having problems with 2 crashes in 5 months, both crashed shortly after take off

    1st Crash Lion Air Oct 2018
    2nd Crash Ethiopian Airways Mar 2019 (New plane delivered in Nov 2018)

    RIP to all the deceased.

    Would you take a Boeing 737-800 MAX if your next flight was on this model ???

    https://www.scmp.com/news/world/afri...airobi-crashes


  2. #2

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    China have grounded all the MAX's. Seems Boeing introduced something called MCAS in the Max, which attempts to prevent the aircraft pitching up if the pilots command too much thrust from the engines at certain phases of flight.

    Probably a contributing factor in the Indonesia crash, and possibly in this one too.


  3. #3

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    MCAS certainly seems to be a controversial topic.
    Any pilots know which of these is true?

    https://theaircurrent.com/aviation-s...em-mcas-jt610/

    States MCAS is not in the FCOM (Flight Crew Operations Manual) but the following (6 days later) states the opposite:

    https://theaircurrent.com/aviation-s...irlines-jt610/


  4. #4

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    One big difference between Air Lion and this Ethiopian is that the latter was in flame prior to crashing (the former was not).
    Can a failure of the plane's controls in general (be it the MCAS or other systems) really cause a plane to burst into flames ?...


  5. #5

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    The in flames comment was just an eyewitness report, and such statements have not always proved to be accurate in the past. There is always a lot of misleading information in the immediate aftermath of these tragic events.

    I remember several eyewitness statements on MH370 that all turned out to be utter bollocks.


  6. #6
    bdw
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    Hope they get to the bottom of it soon. Reminds me of 2010 when Qantas grounded their fleet of A380s for a month after an engine exploded mid flight.


  7. #7
    er2
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    Quote Originally Posted by jrkob
    One big difference between Air Lion and this Ethiopian is that the latter was in flame prior to crashing (the former was not).
    Can a failure of the plane's controls in general (be it the MCAS or other systems) really cause a plane to burst into flames ?...
    MCAS changes the pitch of the plane, nothing more. However, increasing the pitch too much can make a plane stall. This data from flight radar makes it seem like it had somewhat similar behaviour to the lion air accident:
    https://www.flightradar24.com/blog/f...es-flight-302/

    Basically, a potential issue seems to be that if the angle of attack sensors get faulty information about the plane pointing up too steeply, MCAS kicks in and pushes the nose down. And if this is not noticed fast enough by the pilots, you might be losing altitude right after takeoff very quickly. Add to this that Addis Abeba is more than 2000m above sea level (and hence you have less lift at the same speed) .....

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    All the technical information, pilot feedback, informed opinion, uninformed opinion, speculation, armchair experts and conspiracy theories you will ever need can be found here:

    https://www.pprune.org/rumours-news/...wn-africa.html


  9. #9

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    Quote Originally Posted by er2
    MCAS changes the pitch of the plane, nothing more.
    Exactly, hence my comment about why burst into flames... as TB points out perhaps this is erroneous.
    As the plane crashed on land I presume the probability they find the black boxes is decent. Let's see what happens.

  10. #10

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    As the plane crashed on land I presume the probability they find the black boxes is decent. Let's see what happens.
    That was my first thought - they should be able to recover the different boxes relatively quickly. Would be interesting to see if its related to the previous crash and what happens to Boeing (regardless of the cause).

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