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Here is another view. KLM Royal Dutch Airlines Aircraft Seating Charts - Airline Seating Maps and Layouts http://www.aviationexplorer.com/airl...LM_737-300.jpg Looks like that tank-like thing is the galley. Quote:
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I'd hesitate to guess based on any early report, next thing you know people will come out of the woodwork to say they saw a missile, nothing should be discounted just yet. For historical reference. http://www.b737.org.uk/fuel.htm Quote:
http://www.b737.org.uk/images/fuelpump_locations.gif Fuel will be near the C of G and Center of Lift, a jet fuel sourced fire at the rear of the plane seems unlikely, but I am not an aircraft designer, just using some common observations based on published information. |
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The flight data and voice recorders have been retrieved. Lets hope they survived that massive impact as they are designed to do. That will answer a lot of questions.
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The system is not much different that what has been around for ages, but lets have a real pilot (Mac McClellan) explain that. "Because the new MAX version of the 737 has heavier engines and other changes, Boeing added a system that under certain conditions of airspeed, CG location and weight, automatically moves the pitch trim to modify stick force. The pilot who is hand flying feels this as though he is pulling on the yoke and would naturally reduce pull force to lower the nose and angle of attack (AOA)." "In the non-aviation media, this system is being called everything from new, to radical, to untested. In reality, nearly all airplanes larger than a basic four-seat piston single use some sort of device to alter the forces a pilot feels while maneuvering the airplane." https://airfactsjournal.com/2019/03/can-boeing-trust-pilots/ |
This is a table of radar-sourced data on the initial phase of flight. The altitude of the runway is around 72xx ft. I am not sure that the data shows the entire flight. Note the steadily increasing ground speed and the oscillations in the vertical speed. Note also the time intervals between the swings in vertical speed. Lastly, note the initiation of a turn near the end of the data.
http://forums.pelicanparts.com/uploa...1552405329.jpg |
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https://seekingalpha.com/news/3441964-boeing-make-significant-cockpit-software-update-737-max-wsj
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2014 United Airlines 777 diverts to Canada after galley fire Fire Protection - Boeing |
Eyewitnesses are often unreliable. Still, if turns out wasn't the auto trim control then BA stock will pop. If it was, then BA will roll out the software fix and it all blows over, except for the families.
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The UK today banned the 737Max from flying in UK airspace
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Are you kidding me? I couldn't believe this when I read it, if true:
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I'm sorry, but in this day an age, with the invention of self-driving cars and other automated equipment, the MCAS system should *not* be able to slam the plane into the ground unimpeded. I mean, the stupidity of that is insane. When I first heard about the system, I thought, well, it must be more complicated than that, and perhaps a software error (which is notoriously difficult to plan for when there are anomalies). But depending upon a single sensor to then send the airplane directly into the ground? At the very least, the system should have redundancy to know that it's about to destroy the airplane. My 20-year old BMW doesn't have a single-sensor system for ABS or the airbag deployment, it's inconceivable that an airliner would.
Still flabbergasted. -Wayne |
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ATP is 1500 hrs minimum, IIRC. |
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Sounds like only the USA and Canada are allowing them to fly https://edition.cnn.com/2019/03/12/africa/airlines-suspend-boeing-flights-intl/index.html Better to be safe than have another one fall out the sky onto your citizens Jeff, I can't imagine the mood at Boeing, the guys must be working all hours, checking and rechecking systems, design's and flight scenario's |
If they have the black boxes, then they should absolutely know right now if the MCAS anti-stall system was triggered on this flight? I would think that transparency in releasing information would be paramount right now.
-Wayne |
Wow, 200 hrs. is crazy low time for ANY seat in a 737.
TIA, my bru. |
Wayne, I cannot read your WSJ article (not a subscriber), but I think I'm sensing a bit of confusion between what constitutes the MACS and the simple Angle of Attack sensor.
Yes, indeed, there is typically only one AOA sensor on an aircraft. It's a pretty simple and very reliable mechanical device. While MACS relies upon input from the AOA sensor, it also receives input form a number of other sources. MACS only intervenes when the combined input from all sources tell it that the aircraft is approaching a stall. Boeing may be looking at adding redundancy to these other systems. Adding another AOA sensor would not be a simple software upgrade - it would have to be a mechanical modification to the aircraft, adding another AOA sensor. AOA is sometimes difficult to understand. It's not a function of how high the nose is, it's a function of how high it is relative to direction of travel: http://forums.pelicanparts.com/uploa...1552432729.jpg |
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