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B-737 Cargo Plane down in Hawaii

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B-737 Cargo Plane down in Hawaii

Old 11th Sep 2021, 16:02
  #261 (permalink)  

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12,4 * 60 = 744, that's a no-flare landing. Any Boeing could sustain that equally well and it's been tested during base training many times, I'm sure.

But that is not your point, understood. Luckily we have no Airbii or Embraer to compare, hope it stays that way. Although I do think they'd result in less disintegration. Designs that are 30 or 40 years more advanced in stress engineering and CAD application should pass the crash test more gracefully.

Building a theoretical fuselage and wings is not probably black magic, joining them together however could be. The 737 is done the way it is done, it is done well enough for a trustworthy airliner.
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Old 11th Sep 2021, 23:35
  #262 (permalink)  
 
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In regards to this accident and subsequent hull break up vs The Hudson incident.

There are a few things that were very different.

1. It was night - much harder to judge a landing onto a black unlit, uneven surface.

2. 5 foot waves in open water - any sailors or surfers will know the power of the waves, we do not know if the airframe broke up immediately.

3. Airframe age - this is an old aeroplane, that does many short sectors, and has a cargo door mod.

This crew survived a horrific ordeal, as did the passengers and crew on the Hudson.

Would the A320 have survived in the same conditions? I donít know, and I hope none of us ever find out.
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Old 12th Sep 2021, 04:40
  #263 (permalink)  
 
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DFDR will show the impact load/ROD only then one will know what happened.
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Old 13th Sep 2021, 02:09
  #264 (permalink)  
 
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I rather doubt a 737-200 is going to have a DFDR. More likely one of the old analog tape units - and impact loads/ROD are not likely...

As for the fuselage breaking into three pieces - sorry but that's basically just physics. The strongest bit of the fuselage is the wing box (by a considerable margin since it carries both the total wing loads and total fuselage loads) - that's not going to be the first thing to let go if the fuselage is overstressed. It'll fail in front and/or behind the wing box - so you get the front and rear fuselage sections breaking off from the wing box.
Like I said, basic physics.
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Old 1st Oct 2021, 14:04
  #265 (permalink)  
 
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"The National Transportation Safety Board (NTSB) announced that the recovery of a cargo plane that ditched in waters off Kalaeloa will begin in October."

​​​​​​https://www.khon2.com/local-news/car...m-ocean-floor/
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Old 13th Oct 2021, 02:08
  #266 (permalink)  
 
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NTSB Twitter shows investigators boarding the Blue Horizon to begin recovery operations for TransAir 810.

NTSB Prepares to Recover 50-Ton Section of Crashed Jet
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Old 13th Oct 2021, 22:55
  #267 (permalink)  
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That's a pretty heavy -200 ?
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Old 2nd Nov 2021, 14:39
  #268 (permalink)  
 
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From NTSB via Ian Duncan
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Old 2nd Nov 2021, 15:22
  #269 (permalink)  
 
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Full photoset
and B-Roll:
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Old 2nd Nov 2021, 18:13
  #270 (permalink)  
 
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Based on that amount of damage, they must have hit the water HARD!
That wasn't a Sully style gentle ditching... The pilots were lucky to get out.
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Old 2nd Nov 2021, 20:11
  #271 (permalink)  
 
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T/O flaps still set. Yeah it hit pretty hard to rip off the nose gear and everything below the floor beams.



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Old 3rd Nov 2021, 04:30
  #272 (permalink)  
 
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That's a pretty heavy -200 ?
Perhaps an allowance for entrained water in the crane lifting capacity.
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Old 3rd Nov 2021, 05:29
  #273 (permalink)  
 
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Interesting video. I'm wondering how did they get the slings attached? ROVs or divers?
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Old 3rd Nov 2021, 06:17
  #274 (permalink)  
 
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The video shows ROV, claw shown with sling and with pilot at ships controls. The linked article says the ship is equipped with ROV.
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Old 4th Nov 2021, 07:23
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I think that the chances of survival would increase if the pilots had a seaplane endorsement. When I have time, I contemplate what would I do in the open ocean ditching. . I would probably treat it as a rough water landing and glide on down while remembering to slow down late as late as possible to not let high sink rates develop and hope for the best . Probably wouldn't work but itís what I do....also, there's excellent advice on ditching in the FAA AIM

Last edited by Pugilistic Animus; 13th Nov 2021 at 16:04.
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Old 4th Nov 2021, 08:11
  #276 (permalink)  
 
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The evidence suggests these guys didnít perform a controlled ditching with minimum energy, they crashed into the sea while trying to make it to an airfield. They were so, so lucky to survive, had there been passengers there would have been catastrophic loss of life.

Wings off, engines off wings, fuselage in three pieces. Compare that to whatís left after a successful ditching of an aircraft the same size.
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Old 4th Nov 2021, 16:38
  #277 (permalink)  
 
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Sea state likely played a major role in the damage pattern. Sully had the advantage of daylight and confined waters.
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Old 4th Nov 2021, 20:40
  #278 (permalink)  
 
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Plus Sully got the APU running so he had full electrical power and all the instrumentation that goes with it.
Still haven't heard confirmation one way or the other, but if both engines went sub-idle, the IDGs would have dropped and they would have been on (very limited) battery instrumentation (which I don't think includes radio altimeter)..
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Old 4th Nov 2021, 22:26
  #279 (permalink)  
 
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The wings, empennage and fuselage aft of the break are all essentially in one piece and, in many respects, undamaged. However the aircraft hit, a lot of energy was absorbed such that it broke apart in really just two sections. It will be very interesting to see what the investigation can say about how it impacted the water such that it ended up in this state.
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Old 5th Nov 2021, 00:47
  #280 (permalink)  
 
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Locked door

So, what are the successful ditchings of these aircraft?
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