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TU154 out of Sochi is missing.

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TU154 out of Sochi is missing.

Old 9th Jan 2017, 17:50
  #361 (permalink)  
 
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Also RA is visible on night shoot.
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Old 9th Jan 2017, 17:55
  #362 (permalink)  
 
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it is very important to clarify if its the same wing on 325 and 351 or not.

the picture on 325 shows clearly flaps up , in 351 partially down . if its the same wing it may mean nothing beyond a torn off drive mechanism and gravity deployment by placing the wing inverted or not .

if 325 ist the starbord wing ( flaps up ) and 351 is the port wing ( flaps partially down ) we have a strong indication of flap asymmetry !
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Old 9th Jan 2017, 18:13
  #363 (permalink)  
 
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On a completely different tack, are we to understand that, unsurprisingly, the TU-154 has a natural tendency to dutch-roll at low altitude, as apparently demonstrated in this video?

https://www.youtube.com/watch?v=XzyU...ature=youtu.be

If so, I presume the rudder has one or more yaw dampers?
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Old 9th Jan 2017, 18:25
  #364 (permalink)  
 
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Originally Posted by Kulverstukas
Post #351 - seems port i.e. left wing top up faced us with trailing edge. (flaps cowling bigger right to left).
Looking at the other pictures of that series I would strongly tend say: Starboard wing.
???????-????: ????????? ????????????: 0DarkAngel0
It is Right side up, and the flaps are longer on the left side of the part, i.e. left side is towards the fuselage.

Post #325 - seems starboard wing i.e. right, at the far top side visible place of gears cowling torn off[/QUOTE]
Agreed.
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Old 9th Jan 2017, 18:37
  #365 (permalink)  
 
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Originally Posted by Kulverstukas




Also RA is visible on night shoot.
Is the piece of wreckage with the markings RA-85 part of the No2 engine cowl.
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Old 9th Jan 2017, 18:39
  #366 (permalink)  
 
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Yes, if it was a question
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Old 10th Jan 2017, 00:28
  #367 (permalink)  
 
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it looks like right wing outer flap actuators are disconnected. There are two of them and the are located at the both ends of the flap. Thus, position of the flap on the picture does not refelect their position right before accident.
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Old 10th Jan 2017, 18:18
  #368 (permalink)  
 
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Flaps

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Old 10th Jan 2017, 18:19
  #369 (permalink)  
 
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Main gear lock(s)?





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Old 10th Jan 2017, 19:04
  #370 (permalink)  
 
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Yes it was, thank you Kulverstukas. That being the case it would expect that for ease of access, it would be retained by means of the usual quick release fasteners. It does not appear to be greatly deformed and not folded back, almost neatly peeled off. Cannot see the other side of it but it appears from what can be seen to have in the main, retained its form. In considering the possible impact trajectory it may provide some clues. Such as a break of the tail section with a high AoA on impact.
The hydraulic hoses shown on the gear pictures are curious. Are they sleeved, they seem to be lacerated, what are those marks around the circumference of the top hose. Are they some sort of binding or are they tear marks. Difficult to tell from the photo.
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Old 16th Jan 2017, 10:32
  #371 (permalink)  
 
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Old 16th Jan 2017, 13:45
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Originally Posted by DaveReidUK
It's pretty common usage, in my experience (which includes crawling inside them).

Even Wikipedia manages a defiinition:

"A wet wing is an aerospace engineering technique where an aircraft's wing structure is sealed and used as a fuel tank. Wet wings are also called integral fuel tanks."
Yup... agree entirely DaveReid.. incl. crawling inside
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Old 16th Jan 2017, 18:17
  #373 (permalink)  
 
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Good evening Kulverstukas,

In the latest picture you have posted (in #372), is that the R/H (starboard) wing again?

If so, is the L/H (port) wing missing, or in small pieces?
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Old 16th Jan 2017, 18:25
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Originally Posted by Chris Scott

If so, is the L/H (port) wing missing, or in small pieces?
I think so.
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Old 17th Jan 2017, 18:19
  #375 (permalink)  
 
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Kulverstukas photo no 373 shows the pax terminal in the background. Is all this debris and wreckage strewn all over the apron in view of the travelling public.
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Old 17th Jan 2017, 18:25
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It's cruise ship terminal and it's closed for winter.
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Old 24th Jan 2017, 03:16
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Originally Posted by AN2 Driver
We can't really say this or anything else with the facts we have now. Therefore it would be helpful to know what this ATC tape really says after the take off.



Fuel stop is what the consensus seems to be. Planned stop.
Probably so they wouldn't have to upload fuel in Syria
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Old 24th Jan 2017, 04:37
  #378 (permalink)  
 
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the TU-154 has a natural tendency to dutch-roll at low altitude, as apparently demonstrated in this video
Chris, was apparently caused by miss wiring of some element of the flight control system.

Barely controllable Tu-154 - another UA232 [Archive] - PPRuNe Forums
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Old 24th Jan 2017, 11:20
  #379 (permalink)  
 
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Hi megan,

You've misquoted my question as an assertion! For the benefit of any newcomers, this was my question:
"...are we to understand that, unsurprisingly, the TU-154 has a natural tendency to dutch-roll at low altitude, as apparently demonstrated in this video?"

Admittedly my assumption was and is that it does have the tendency, which necessitates a yaw-damping system, and that it was a major malfunction of the system that caused the videoed incident. That malfunction apparently involved cross-wiring, which may have exaggerated the tendency. Thanks for the link.

I'm wondering, however, if a simple absence of yaw damping, due to a spontaneous failure of the system, might itself render the aircraft difficult to control after take-off. Presumably, in this case at Sochi, the system was working normally on the previous sector. But even that is conjecture.
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Old 25th Jan 2017, 08:18
  #380 (permalink)  
 
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Kulverstukas, are you aware of any formal finding on the TU-154 dutch roll incident mentioned by Chris Scott?

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