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Any "Latest & Greatest" about Delta?

Old 05-01-2013 | 06:46 PM
  #129501  
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From: blueJet
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Originally Posted by Carl Spackler
...At the first realization that pitch is not controllable (even with full forward yoke pressure), roll hard to the left or right to point the lift vector on or even below the horizon (90 to 100 degrees of bank angle). This causes the nose to quickly fall below the horizon and airspeed to rapidly increase assuming you leave power at full...
The video almost looks like they tried. One wing drops and the nose falls through the horizon, unfortunately they were on the deck before they could get the pitch back to level.

Of course they also could have been wallowing in a stall the whole way down.

Either way, the stuff of nightmares...
Old 05-01-2013 | 06:55 PM
  #129502  
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From: 88B
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Originally Posted by Boomer
The video almost looks like they tried. One wing drops and the nose falls through the horizon, unfortunately they were on the deck before they could get the pitch back to level.

Of course they also could have been wallowing in a stall the whole way down.

Either way, the stuff of nightmares...
+1...

4x
Old 05-01-2013 | 07:04 PM
  #129503  
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Originally Posted by Boomer
The video almost looks like they tried. One wing drops and the nose falls through the horizon, unfortunately they were on the deck before they could get the pitch back to level.

Of course they also could have been wallowing in a stall the whole way down.

Either way, the stuff of nightmares...
It looked like they were in a full stall by the time they rolled left, then right. It then looks like a spin was starting to develop.
Old 05-01-2013 | 07:14 PM
  #129504  
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Originally Posted by horrido27
Not sure if you made this post in jest or serious..
But even a C-5 would have been screwed.
No way to open the back end from upstairs.. takes the Loadmasters to pull ramp pins and then open the aft ramp & door from downstairs~

Motch
ex C-5 FE~
It's okay Motch...we -141 guys picked up all your slack.
Old 05-01-2013 | 07:21 PM
  #129505  
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From: blueJet
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Originally Posted by Mesabah
It looked like they were in a full stall by the time they rolled left, then right. It then looks like a spin was starting to develop.
I would agree... but for the nose coming up in the final seconds.

Jury's out until they crack into the FDR and make some chilling cartoons for the rest of us to learn from.
Old 05-01-2013 | 07:31 PM
  #129506  
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From: Light Chop
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Originally Posted by Carl Spackler
Incredibly sad. We all need to try to learn anything we can from the loss of these lives, and the following is meant for that purpose:

If they had cargo come loose, and If that resulted in an instant CG movement beyond the aft limits, a full aerodynamic stall and departure from controlled flight may have been preventable. I got to experience this very thing in the test environment, and the recovery technique is not immediately logical. At the first realization that pitch is not controllable (even with full forward yoke pressure), roll hard to the left or right to point the lift vector on or even below the horizon (90 to 100 degrees of bank angle). This causes the nose to quickly fall below the horizon and airspeed to rapidly increase assuming you leave power at full. As airspeed increases, level the wings and accept that the nose will rapidly rise again. Repeating this pattern results in gaining altitude with each roll reversal, and buys time to trim the stabilizer to the full nose down limit, select full flaps, and the aircraft is controllable with full forward yoke pressure.

There's no way you can pull this off without the instant reaction that only comes from prior training and mental preparation. Assuming the crew never got this training, they sadly had no chance. Not saying with certainty this recovery technique would have worked in this condition, but it may have.

Something to think about.

Carl
Carl, very interesting.

Originally Posted by Boomer
I would agree... but for the nose coming up in the final seconds.

Jury's out until they crack into the FDR and make some chilling cartoons for the rest of us to learn from.
Well, if this turns out to be from a load shift and given the CLT 1900D crash, it'd be good if the losses were not in vain.

The video as horrendous as it is to see does something an NTSB report cannot do and that's get everyone's attention. Normally in a videoed accident it's "uh, pilot error, I would never have..." but this one just hits home and your heart goes out to those seven guys and their families.
Old 05-01-2013 | 07:34 PM
  #129507  
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Interestingly, I combed through the Delta 747 manuals on DeltaNet and it looks like the Delta training manual has a procedure laid out as Carl states. The Boeing company manual does not, unless I missed it.
Old 05-01-2013 | 07:43 PM
  #129508  
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From: 737 ATL
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Originally Posted by Carl Spackler
At the first realization that pitch is not controllable (even with full forward yoke pressure), roll hard to the left or right to point the lift vector on or even below the horizon (90 to 100 degrees of bank angle). This causes the nose to quickly fall below the horizon and airspeed to rapidly increase assuming you leave power at full. As airspeed increases, level the wings and accept that the nose will rapidly rise again.
If you roll a widebody transport 90 degrees and drop the nose far enough below the horizon to make airspeed rapidly increase you would have to be trading quite a bit of altitude.
Might work at 10,000 feet but I don't think you'd have enough room to perform a maneuver like that right after takeoff.
Old 05-01-2013 | 07:46 PM
  #129509  
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From: Retired AF/A320 FO
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We do this drill in C-17 for runaway pitch trim. It's tough to do with less than 200+ knts and some altitude to play with. Since the reaction would have needed to be so close to the ground and airspeed at takeoff speeds not sure you could keep it from stalling past 60 degrees bank or digging in a wing. I'm sure we'll do it in the sim shortly. The gear were still down and with the flaps probably in takeoff that would have been a factor to help and hinder as well.
Old 05-01-2013 | 08:26 PM
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A procedure such as Carl's might work in a "steady state" condition. However, if the cargo did come loose it was now free floating in the back. Who is to say it didn't all come crashing back forward as the nose fell through the horizon? Those guys never had a chance. RIP.
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