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[Skyline NewsRoom] Air France 447 Memory Unit Found - Page 4

post #31 of 49
Quote:
Originally Posted by Killam0n;13667693 
So likely stalled, but did not tell the crew it was in stall state... wouldn't that kinda put blame on the manufacture of the plane? and I read else where that the air speed tubes are known for getting clogged on some types of planes - and there has been a fix issued for it. also combine this with a particular model of rolls royce engine that is known to have issues.

"The aircraft was powered by two General Electric CF6-80E1 engines with a maximum thrust of 72,000 lb"
http://en.wikipedia.org/wiki/Air_France_Flight_447
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post #32 of 49
Quote:
Originally Posted by SectorNine50;13660352 
http://www.businessweek.com/news/2011-05-27/air-france-crew-may-have-faced-baffling-instrument-data-in-crash.html

Apparently the plane was at a 35 degree angle of attack the majority of the drop from 38,000 feet. They were in a stall, and the computer was trying to give stall warnings, but somehow it wasn't getting to the pilots.



Based on what I read, the weather was pretty terrible. A "perfect-storm" series of events very well could have caused the crash.

However, I'm surprised to see people speculate that Airbus is completely free of fault in this accident, considering they have had a history of instrumentation problems.

Plus, everything I read points to the fact that the plane was giving the pilots absolutely no idea of what was occurring.

AOA 35 degree eek.gif airfoil stalls at 16 degree!
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post #33 of 49
My question is... How on earth does a plane get into a 35 degree noseup state and the pilots don't notice it?


There must've been an hydraulic failure, otherwise they would've been able to apply thrust, full elevator down and put the plane in a nose dive state, which would've made it regain enough airspeed to lose the stall status...


...unless there was a very very strong tailwind. That could explain why this massive AoA and the unrecoverability of it.
   
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post #34 of 49
Quote:
Originally Posted by Artikbot;13669572 
My question is... How on earth does a plane get into a 35 degree noseup state and the pilots don't notice it?


There must've been an hydraulic failure, otherwise they would've been able to apply thrust, full elevator down and put the plane in a nose dive state, which would've made it regain enough airspeed to lose the stall status...


...unless there was a very very strong tailwind. That could explain why this massive AoA and the unrecoverability of it.

Angle of attack does not equal the nose up angle relative to the horizon.

In this case, I think the plane was 15 degrees nose up but the plane forward vector was going down by 20 degrees (it was stalled) so the sum of both give the 35 degrees of angle of attack.

The pilot have put full throttle and also brought the nose up. They recognized the loss of altitude but not the stall. Since they were in thunderstorm maybe they thought they were in a very strong downdraft and tried to fight it.

In the end (at around 10,000 feet) it seems they recognized the stall and pushed the nose down but it was not enough to recover the airliner from the stall.
Edited by shiloh - 6/4/11 at 3:13pm
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post #35 of 49
Quote:
Originally Posted by shiloh;13752056 
Since they were in thunderstorm maybe they thought they were in a very strong downdraft and tried to fight it.

This makes sense. But if it was at cruise height, they would've noticed the altitude loss from the beginning.


I seriously doubt this has been solely a human error.
   
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post #36 of 49
The sudden 7,000ft/min climb says to me they got caught in some wicked winds...

Has there been any more updates on this?
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post #37 of 49
Thread Starter 
Based on information from an Investigation by a Private Party, The PITOT systems on the A330 Broke and this caused a Perfect storm of Automated Pilot Functions and Safety Functions, with no Accurate Speed the crew could not knwo whether or not they were stalling..
post #38 of 49
Wait, are you saying they are completely retarded and couldn't tell that they were suddenly pointing towards space and slowly falling and didn't notice it? You would think that they would notice even with their nose pointed up that the plane was dropping, hence the clouds moving past them even in a storm. Something is fishy about all this.
post #39 of 49
Thread Starter 
Quote:
Originally Posted by Maelthras;13902441 
Wait, are you saying they are completely retarded and couldn't tell that they were suddenly pointing towards space and slowly falling and didn't notice it? You would think that they would notice even with their nose pointed up that the plane was dropping, hence the clouds moving past them even in a storm. Something is fishy about all this.

The crew Failed to take manual Control of the Throttle thus putting them further into a Stall.

At This point it is extremely Difficult to Pull out of a Stall.
post #40 of 49
Thread Starter 
Quote:
Originally Posted by Maelthras;13902441 
Wait, are you saying they are completely retarded and couldn't tell that they were suddenly pointing towards space and slowly falling and didn't notice it? You would think that they would notice even with their nose pointed up that the plane was dropping, hence the clouds moving past them even in a storm. Something is fishy about all this.

Because Unlike Boeing's Aircraft the Auto Throttle on an Airbus A330 does not Cause the Throttle to physically move, meaning that less attention is being placed on the Throttle. The less the Attention, the slower the reaction time.
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