Another Boeing crash

Discussion in 'The Mainboard' started by NineteenNine, Mar 10, 2019.

  1. CaneKnight

    CaneKnight Well-Known Member
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    You know you’re in some sort of capitalistic hellworld when the feature that keeps the plane from crashing is an “add on”
     
  2. Artoo

    Artoo 1312
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    3rd



    Well, ok. 2nd issue with the MAX. But also 2nd issue they have put effort considerable effort into covering up
     
    #502 Artoo, Jun 27, 2019
    Last edited: Jun 27, 2019
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  3. Where Eagles Dare

    Where Eagles Dare The Specialist Show On Earth
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    Who was the guy who's Dad owned a dealership flew planes so he knew it was the pilots fault and not Boeing?
     
  4. dblplay1212

    dblplay1212 Well-Known Member
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    THF
     
  5. THF

    THF BITE THE NUTS, THUMB IN THE ASS!
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    Sup guys!
     
  6. bwi2

    bwi2 Not affiliated with BWI
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    Don’t ask a 737 max flight computer this question!
     
  7. Arkadin

    Arkadin inefficiently efficent and unclearly clear
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    I see no problems with the airframe
     
  8. BellottiBold

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    :laugh:
     
  9. NineteenNine

    NineteenNine Divers are, in fact, wankers. It's science.
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    This just keeps getting better and better.
     
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  10. Where Eagles Dare

    Where Eagles Dare The Specialist Show On Earth
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    Seems absurdly low to me....

     
  11. Redav

    Redav My favorite meat is hotdog
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  12. BP

    BP Bout to Regulate.
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    Cutting labor costs after getting a huge tax break from the Trump tax cuts and giving their CEO almost 20 million in bonuses. :dubioustrump:
     
  13. Bruce Wayne

    Bruce Wayne Billionaire Playboy
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  14. Bruce Wayne

    Bruce Wayne Billionaire Playboy
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    Michigan Wolverines

  15. NineteenNine

    NineteenNine Divers are, in fact, wankers. It's science.
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    Not sure where else to put this. Fascinating how close this came to being an absolute disaster.

     
  16. Illinihockey

    Illinihockey Well-Known Member
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    Holy shit, that video is terrifying. Its amazing they didn't hit any of the planes
     
  17. Bruce Wayne

    Bruce Wayne Billionaire Playboy
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    Now an issue with the 737NG

     
  18. bigred77

    bigred77 Well-Known Member
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    Little jb weld should fix that right up
     
  19. Doc Louis

    Doc Louis Well-Known Member
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    Add a nice shiny layer of duct tape and it'll be good as new
     
  20. Simon Templar

    Simon Templar Well-Known Member
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    Was scuba diving with the head of Southwest Airlines pilot training and education in Hawaii this summer. Asked him about the MAX8 and he said it was training issues in the regions they had crashes. That Southwest was actively training on it throughout the rollout of the planes with pilots.
     
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  21. NineteenNine

    NineteenNine Divers are, in fact, wankers. It's science.
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    Not too surprising.
     
  22. NineteenNine

    NineteenNine Divers are, in fact, wankers. It's science.
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    YIKES
    I
    K
    E
    S
     
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  23. BP

    BP Bout to Regulate.
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    All those years of paying no fed taxes and they still cut corners and put out unsafe shit.
     
  24. southlick

    southlick "Better Than You"
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  25. Why?Pokes

    Why?Pokes Take me back to the kine
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    Virtually all large-scale commercial pilot training is done in simulators. The first time the pilot flies any particular large jet, is with paying passengers on-board.

    Southwest had to do unladen test flights in Hawaii because it was their first long-range transoceanic offering and they had to obtain an ETOPS certification before they were allowed to carry passengers.
     
  26. Joe Louis

    Joe Louis no thank you turkish, i'm sweet enough
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    This shit terrifies me :warn:
     
  27. Handcuffed

    Handcuffed TMB OG
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    really fantastic article

     
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  28. Prospector

    Prospector I am not a new member
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    Blackout Bug: Boeing 737 cockpit screens go blank if pilots land on specific runways
    Odd thing haunts Next Generation airliner family (not the infamous Max)
    By Gareth Corfield 8 Jan 2020 at 12:46

    [​IMG]
    A Boeing 737-800 (file photo)
    Boeing's 737 Next Generation airliners have been struck by a peculiar software flaw that blanks the airliners' cockpit screens if pilots dare attempt a westwards landing at specific airports.
    Amid the various well-reported woes facing America's largest airframe maker, yet another one has emerged from the US Federal Aviation Authority; a bug that causes all pilots' display screens in the 737-NG airliner family to simply go blank.

    That bug kicks in when airliner crews try to program the autopilot to follow what the FAA described as "a selected instrument approach to a specific runway".

    Seven runways, of which five are in the US, and two in South America - in Colombia and Guyana respectively – trigger the bug. Instrument approach procedures guide pilots to safe landings in all weather conditions regardless of visibility.

    "All six display units (DUs) blanked with a selected instrument approach to a runway with a 270-degree true heading, and all six DUs stayed blank until a different runway was selected," noted the FAA's airworthiness directive, summarising three incidents that occurred on scheduled 737 flights to Barrow, Alaska, in 2019.

    [​IMG]
    The DUs are the five main screens in front of the pilots plus the sixth in the lower middle position of the instrument panel. When they go offline, pilots rely on analogue backups

    Although full technical details were not given in the airworthiness directive, the FAA said that the seven runways had "latitude and longitude values" that "triggered the blanking behaviour", suggesting some kind of memory interaction between onboard computers causing the screens to stop displaying any information until a different runway was selected in the flight plan.

    The bug affects 737-600, -700, -700C, -800, -900 and -900ER model aircraft, which are running Common Display System Block Point 15 (CDS BP 15) software for their display electronic units (DEUs) together with flight management computer (FMC) software version U12 or later.

    FMCs hold the flight plan, thus navigating the aeroplane from waypoint to waypoint. DUs are the main screens displaying aircraft information to the pilots and are powered by two DEUs, each of which serves three of the DUs. The system arrangement is described in more detail on this website under the heading "NG Flight Instruments."

    In the airworthiness directive the FAA said it had "confirmed that the faulty version of DEU software has already been removed from all airplanes conducting scheduled airline service into the affected airports" in the US.

    [​IMG]
    Runways where Boeing 737 Next Generation aircraft are not supposed to land. Source: US FAA

    Commercial jet airliners are far from immune to software bugs. Infamously, Boeing's 787 Dreamliner needed power cycling every 248 days to prevent the aircraft's electronics from powering down in flight, while Airbus' A350 was struck by a similar bug requiring a power cycle every 149 hours to prevent avionics systems from partially or even totally failing to work.

    Human error with electronics can also cause problems for commercial aviation: a typo in GPS co-ordinates left an Air Asia Airbus A330's navigational system thinking it was 11,000km away from its true position, while the captain of another airline's A330 found out the hard way that hot coffee and electronic hardware really do not mix.

    Boeing has not responded to The Reg's request for comment.
    also
    176 die in crash of Ukraine Airlines' 737-800
    Adding to Boeing's unfortunate media coverage today is the crash of a Ukraine International Airlines 737-800 in Iran early this morning. The airliner had taken off from Imam Khomeini airport near the capital of Tehran before coming down minutes after takeoff, reportedly killing all 176 people aboard. BBC Iran correspondent Ali Hashem obtained footage of a burning object in the sky crashing in a fireball. Although Iranian authorities were quick to issue a statement blaming the crash on an engine fire, a photo reportedly issued by a state-run Iranian news agency shows what appears to be shrapnel damage to pieces of wreckage.

    Semi-official news agency Mehr News reported that the head of Iran's civil aviation authority, Ali Abedzadeh, said it was not clear to which country Iran would send the downed airliner's black boxes for analysis. International custom is for the manufacturer to analyse these boxes; in this case, US-based Boeing.
     
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  29. ButchCassidy

    ButchCassidy Well-Known Member
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    Could that be from an engine blowing?
     
  30. THF

    THF BITE THE NUTS, THUMB IN THE ASS!
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    Yes but hopefully not. The engine is wrapped with a cowling which is designed to contain any explosion inside the engine and avoid pieces blowing outward.
     
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  31. bwi2

    bwi2 Not affiliated with BWI
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    Tell that to Jennifer Riordan
     
  32. ButchCassidy

    ButchCassidy Well-Known Member
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    Saw it posted in the Iran thread. Is the belief that Iran shot it down? Mistaken for a US plane?
     
  33. Clown Baby

    Clown Baby Totally Exonerated, No Wrongdoing
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    Probably not mistake for US since it was departing Teheran which is in the center of the country
     
  34. ButchCassidy

    ButchCassidy Well-Known Member
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    I should probably read up on it myself, but I prefer TMB dot com cliffs.
     
  35. THF

    THF BITE THE NUTS, THUMB IN THE ASS!
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    Yep I was thinking about that incident as I typed that. Terrible.
     
  36. THF

    THF BITE THE NUTS, THUMB IN THE ASS!
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    That is the most popular theory going around at the moment and seems to be backed up by the evidence at the crash site. However it’s very early.
     
  37. Prospector

    Prospector I am not a new member
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    Last night, at Ben-Gurion airport, the engine of Air Rwanda Boeing 737-800 caught fire before takeoff. The same model as the one that crashed in Iran today.
    By
    Katy Misic
    -
    January 8, 2020
    35
    0

    [​IMG]
    https://www.rwandair.com/about-us/fleet/

    According to Sharon Idan (Israely radio journalist), who first posted a video of the Rwanda Air Boeing 737-800 on fire, the plane was about to leave Tel Aviv Ben Gurion international airport.

    Rwanda Air’s Boeing 737 was delayed indefinitely before flying from Ben Gurion Airport to Kigali, the capital of Rwanda. This is due to the technical malfunction of the airliner: according to Sharon Idan , the engine caught fire during acceleration before takeoff.

    At that moment, more than 100 passengers were on board the aircraft. All of them citizens of Israel. No one was injured; passengers returned from the liner to the terminal. You can follow current position of the exact plane (AirRwanda 9XR-WF) via Flightradar.
     
  38. THF

    THF BITE THE NUTS, THUMB IN THE ASS!
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    I could be very mistaken, but that appears to be a compressor stall.

    The spinning blades in the compressor stage of a jet engine or turbo fan are themselves airfoils, like the aircraft's wings. The operation of the engine depends on the smooth flow of air over the blades.

    Just like a wing, an individual blade, or a small component of one, can experience an airfoil "stall", where the air flow over the blade separates into a cell of "stuck", highly turbulent air behind the blade, and the air flows around the cell instead of smoothly around the blade.

    When a flow separation occurs, the airfoil's ability to push the air in proper direction at the right flow rate—and thereby contribute to the compression of air behind the fan assembly—is inhibited.

    Since these blades are rotating, the blade quickly moves away from the packet of stagnant air. Of course the stalled air packet has some momentum from the intake air, and it will experience a drift along with the rotating blade, but it is not moving with the average flow of the air through the engine anymore.

    Thus the next blade spinning round tends to encounter the stalled air packet. If the stalled air cell is not particularly large, it may be absorbed by the air flow at this stage and dissipated. Alternatively, it might be large enough to stall the subsequent blade as well. At this point, it is called a "rotational stall".

    If the stall continues to propagate, the ability of the fan stage to deliver air to the subsequent compression stage is impeded, and it will lead to an abrupt drop in pressure inside the combustion chamber. This causes a reduction in available oxygen for combustion. The engine's performance, measured by the thrust delivered, is strongly impaired, and there is likely to be a lot of unburnt fuel remaining after the oxygen in the compressor is exhausted. That unburnt fuel may ignite in a bright exterior flame as it escapes out the back of the combustion chamber and mixes with the oxygen-rich bypass flow, or in the case of a jet engine, after it exits the engine altogether.

    The drop in back pressure in the compressor will, under normal conditions, enable the compressor fan blades to begin operating as proper air foils again.

    An alternative type of stall is a compressor surge. In this case, the problem is caused by unexpectedly high pressure in the combustion chamber (or in the compressor), which forces its way forward as well as backwards, against the incoming flow rate. Again, this disrupts the operation of the compressor blades as airfoils.

    See Advanced Control of Turbofan Engines by Hanz Richte
     
  39. BWC

    BWC It was the BOAT times, it was the WOAT times
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    Stop cutting corners, assholes
     
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  40. THF

    THF BITE THE NUTS, THUMB IN THE ASS!
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    CCTV Video of Crash Close to Impact Scene.

     
  41. bro

    bro Hey Hermano
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    I mean, that’s just so fucking awful for those people’s families. I’d be filled with rage for the rest Of my life
     
  42. Dr. Richard Cranium

    Dr. Richard Cranium I'm sorry, the card says Moops
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  43. Emma

    Emma Wisconsin
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  44. Z

    Z Well-Known Member
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    How did those geniuses not realize that the aircraft took off from the center of Tehran?
     
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  45. letan

    letan Just looking for the gator board
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    Feel like they knew exactly what plane they shot down. Russia phoned a friend and took out another Ukrainian plane. My theory at least.
     
  46. The Banks

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    Why did we shoot down an Iranian plane full of kids and then give people medals for it?

    There’s often overly aggressive behavior in tense and dangerous situations. Hence the goal to not escalating things.
     
  47. Artoo

    Artoo 1312
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    That's not a compressor stall. Compressor stalls are loud bangs with accompanying fireballs out the ass end.
     
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  48. Z

    Z Well-Known Member
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    I mean, yeah that was stupid but very different. This flight took off from right beside where they shot the missiles off. I just can't fathom how they thought a jet ascending from the middle of Tehran was an incoming attack.