Bangladeshi Dash 8 Crash

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Bangladeshi Dash 8 Crash

Unread post by DatRat » Thu May 09, 2019 12:51 pm

A Biman Bangladeshi Airlines Dash 8 Q400 crash landed at Yangon airport, Myanmar. Reports about the cause of this crash are still sketchy at the moment but all passengers and crew are safe, getting treatment for their injuries at local hospitals. The flight originated from Dhaka-Shahjalal international airport (VGHS) to Yangon (VYYY).
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Re: Bangladeshi Dash 8 Crash

Unread post by richard C » Thu May 09, 2019 2:46 pm

That was a very hard landing !!!
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Re: Bangladeshi Dash 8 Crash

Unread post by Volo » Thu May 09, 2019 4:12 pm

At very least Bombardier know that the tailplane is good for 20g's :?
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Re: Bangladeshi Dash 8 Crash

Unread post by dr727 » Thu May 09, 2019 4:29 pm

it isn't a crash but an unintentional contact with the runway
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Re: Bangladeshi Dash 8 Crash

Unread post by jimdavis » Thu May 09, 2019 4:30 pm

richard C wrote:
Thu May 09, 2019 2:46 pm
That was a very hard landing !!!
Richard, I think you might have understated that!

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Re: Bangladeshi Dash 8 Crash

Unread post by Sea Rescue » Thu May 09, 2019 5:48 pm

Wow !! - looking at the first picture, viewed from the rear, the anhedral on the wings made it look like a droopy winged B-52 bomber !!
Am sure the toilet roll in the "loo" looks like a flat-pack of tissues ??? And I feel for the folk who must have suffered spinal injuries from that lot ?? Maybe they must try and run their aircraft on straight Jet-A1 and stop adding a small spade of Curry-Powder in the tanks ?
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Re: Bangladeshi Dash 8 Crash

Unread post by Dragon » Thu May 09, 2019 11:49 pm

No, there's something wrong with this picture, the bends are in the wrong places and the wrong directions- the gear are situated in the engines. This is no ordinary hard landing. He either landed hard with gear up to get that origami, or more likely he somehow ripped his gear off and then bounced around creating the appropriate origami. The wings are flexed down at the shoulders. With wheels down the wings would flex up there as the fuselage collapsed. Instead the fuselage was already on the ground and the wings have flexed down at the shoulder. Look at the nose, there is no ripple underneath with a droop, it has pushed upwards not flexed down. So it has hit something going forwards and flexed upwards. And the floor has been dragged behind a bakkie it is worn out from getting beaten up. I suspect this landed short or long or next to the runway and proceeded to dismantle itself on rough ground. If someone pulls a weather we will probably get the why.
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Re: Bangladeshi Dash 8 Crash

Unread post by African Flyer » Fri May 10, 2019 1:22 am

Dragon wrote:
Thu May 09, 2019 11:49 pm
If someone pulls a weather we will probably get the why.
Reports are that it was raining heavily when they tried to land.
Positive rate! :D
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Re: Bangladeshi Dash 8 Crash

Unread post by richard C » Fri May 10, 2019 8:21 am

Dragon wrote:
Thu May 09, 2019 11:49 pm
No, there's something wrong with this picture, the bends are in the wrong places and the wrong directions- the gear are situated in the engines. This is no ordinary hard landing. He either landed hard with gear up to get that origami, or more likely he somehow ripped his gear off and then bounced around creating the appropriate origami. The wings are flexed down at the shoulders. With wheels down the wings would flex up there as the fuselage collapsed. Instead the fuselage was already on the ground and the wings have flexed down at the shoulder. Look at the nose, there is no ripple underneath with a droop, it has pushed upwards not flexed down. So it has hit something going forwards and flexed upwards. And the floor has been dragged behind a bakkie it is worn out from getting beaten up. I suspect this landed short or long or next to the runway and proceeded to dismantle itself on rough ground. If someone pulls a weather we will probably get the why.
Now that was what I was thinking (but was not as observant as you !!). We have even seen aircraft spin in and look like this.

I can't believe there are no fatalities. It reminds me a little of the SFO B777 wreck - tail severed, wheels off, bottom ripped out and cabin floor collapsed, and main spar broken.
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Re: Bangladeshi Dash 8 Crash

Unread post by ScaleFF » Fri May 10, 2019 6:37 pm

Dragon wrote:
Thu May 09, 2019 11:49 pm
No, there's something wrong with this picture, the bends are in the wrong places and the wrong directions- the gear are situated in the engines. This is no ordinary hard landing. He either landed hard with gear up to get that origami, or more likely he somehow ripped his gear off and then bounced around creating the appropriate origami. The wings are flexed down at the shoulders. With wheels down the wings would flex up there as the fuselage collapsed. Instead the fuselage was already on the ground and the wings have flexed down at the shoulder. Look at the nose, there is no ripple underneath with a droop, it has pushed upwards not flexed down. So it has hit something going forwards and flexed upwards. And the floor has been dragged behind a bakkie it is worn out from getting beaten up. I suspect this landed short or long or next to the runway and proceeded to dismantle itself on rough ground. If someone pulls a weather we will probably get the why.
Similar to this, just a bit less violent?

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Re: Bangladeshi Dash 8 Crash

Unread post by Dragon » Fri May 10, 2019 7:17 pm

ScaleFF wrote:
Fri May 10, 2019 6:37 pm
Dragon wrote:
Thu May 09, 2019 11:49 pm
No, there's something wrong with this picture, the bends are in the wrong places and the wrong directions- the gear are situated in the engines. This is no ordinary hard landing. He either landed hard with gear up to get that origami, or more likely he somehow ripped his gear off and then bounced around creating the appropriate origami. The wings are flexed down at the shoulders. With wheels down the wings would flex up there as the fuselage collapsed. Instead the fuselage was already on the ground and the wings have flexed down at the shoulder. Look at the nose, there is no ripple underneath with a droop, it has pushed upwards not flexed down. So it has hit something going forwards and flexed upwards. And the floor has been dragged behind a bakkie it is worn out from getting beaten up. I suspect this landed short or long or next to the runway and proceeded to dismantle itself on rough ground. If someone pulls a weather we will probably get the why.
Similar to this, just a bit less violent?

If you will indulge me, in actual fact this is a perfect example of why I don't believe it to be a hard landing onto the gear (and rather suspect the damage occurred after touch down when the gear ripped and it was farming.

Compare the damage to the wings on this crash to the Dash8 in ours
image.png
Notice in this one with gear down how the wings have only flexed down outboard of the gear, while at the shoulder where they connect to the fuselage the gear has tried to flex them upwards. In our Dash8 it is downwards here. The moment arm at the shoulder is in opposite direction in each case.

So I believe the Dash 8 did not lose its wings on touch down. It lost its wings after losing its gear so that it had huge weights hanging on its wings flexing all over the place because they now not supported from below as it bounced across unprepared turf, and wings are stressed more against bending upwards(positiveG) than downwards(negativeG) so it was a question of time before it sheared. I do think it ploughed across the ground like that though except not on a runway because it must have been mighty uneven to cause the damage we see.
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