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Why was there a wall near runway at S Korea plane crash airport?

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Re: Why was there a wall near runway at S Korea plane crash airport?

#271
post #246

Earlier quoted context omitted.

> In SFO you'll end up in the bay or hit the terminal depending on the orientation. The bay is survivable and I don't think you can hit the terminal. You could possibly hit the freeway though. That said, two of the runways at SFO are 1.5 km longer than the one in Korea. > In Toronto you'll crash into a highway. That runway is 1.5 kilometers longer than the one in Korea and it's another kilometer to the highway that s…

In Toronto, the 427 is ~100m from the edge of 24R.

Landings/takeoffs from 23/24R/24L are in the westerly direction (away from 427) due to prevailing winds.

Re: Why was there a wall near runway at S Korea plane crash airport?

#272
post #235

Earlier quoted context omitted.

> The wall is a red herring. This is not how safety works. > Something bad is going to happen if you do that at any runway on earth. Then the question is can we do any sort of engineering to reduce the number of fatalities that might occur when this _inevitably_ happens. > Stop looking at the wall and look at the minutes before the crash. The plane hit the wall and exploded. The wall seems pretty important here. I me…

You could mandate that airports incorporate runways shaped as disks with 10 km diameter and another 5 km of empty space around them. Accidents would still happen.

Many runways have an ILS antenna installation inside the protected area. They just follow code guidelines that the mounts can only be so high above grade and must be frangible. This installation is different because of local conditions. They used a common local solution in an inappropriate area.

There are dozens of ways to solve this problem. From the short term of better structure engineering to the long term of better ILS antenna installations that don't require such large structures in such commonly dangerous positions in the first place. We could even get into better run off engineering to handle the somewhat unusual case of a fully gear up landing.

It's just insane to me to say "it's a red herring" as if this were a mystery novel and not an emergent failure of several safety mechanisms.

Re: Why was there a wall near runway at S Korea plane crash airport?

#273
post #126
post #108

Earlier quoted context omitted.

Cause of death was landing halfway down a runway at high speed with no gear. Why were they cleared to land if they hadn't set flaps and locked gear? There was ocean in front of them both before and after their turn: landing there would have been more survivable than landing fast and hard with no gear. They were below minimum turnback altitude, and wouldn't have been able to complete the planned turn without the same…

They declared an emergency. It's typical in that scenario to be approved for whatever runway the pilot deems best... or golf course... or field.

Engine losses due to bird strike are pretty common. Planes declare an emergency and are vectored to a holding pattern where they run though emergency checklists and verify that they are ok to land at the current airport with current capabilities, weight, weather, etc. This takes 10 to 20 minutes.

This did not happen on this flight

Re: Why was there a wall near runway at S Korea plane crash airport?

#274
post #246

Earlier quoted context omitted.

In Toronto, the 427 is ~100m from the edge of 24R.

Landings/takeoffs from 23/24R/24L are in the westerly direction (away from 427) due to prevailing winds.

But in an emergency is it impossible for aircraft to land in the opposite direction? That's what happened at Muan; the concrete structure was only present if the plane landed against the normal approach.

Re: Why was there a wall near runway at S Korea plane crash airport?

#275

Earlier quoted context omitted.

[flagged]

The pilots on 9/11 were intentionally directing their aircraft toward specific structures to maximise destruction, casualties, and terrorist impact. That was their express intent and mission for which they had specifically trained. In all likelihood the pilot of Jeju 2216 was not specifically directing his aircraft to the nonfrangible ILS Muan Murder Wall. There is no way to charitably argue otherwise.

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Re: Why was there a wall near runway at S Korea plane crash airport?

#276

Why are we seeing random videos of this from bystanders? Why are there not video cameras constantly recording the activity on the ramp and runways?

Maybe the footage from runway cameras was sequestered for internal review.

How does hiding videos help anyone? It's not like the footage magicaly disappears when you show it to the public and investigators can't use it. We live in the digital era, it takes like 7 clicks to share the footage to the entire world. Are pilots and engineers around the world gonna be better at preventing this type of disaster if we all make sure they never ever get to see it?

Re: Why was there a wall near runway at S Korea plane crash airport?

#277
post #149

The wall is a red herring. The plane landed halfway down the runway at high speed. Something bad is going to happen if you do that at any runway on earth. In SFO you'll end up in the bay or hit the terminal depending on the orientation. In Toronto you'll crash into a highway. Stop looking at the wall and look at the minutes before the crash.

Right. Pilot boards agree on this. It's clear that the plane landed halfway down the runway at high speed, no gear, flaps, slats, or speed brakes. A runway overrun was inevitable from that point. Nobody knows yet why they landed in that configuration. Failed go-around? Engine out landing? Cut wrong engine after a bird strike? Loss of hydraulics? Too rushed for landing checklist in an emergency? All of those are possi…

It does seem unlikely to me that a surface designed to give under the pressure of an aircraft wheels’ contact patch would function as designed under the comparatively lower pressure of an aircraft skidding along its belly.

Re: Why was there a wall near runway at S Korea plane crash airport?

#278
post #99

My wife is South Korean (from andong). I asked her and she looked at me like I'd grown a second head "because it's South Korea? We're a young country and that is tiny airport in the south, half of Korea is a safety hazard and you know that fine well, some freaking idiot put a wall there, oh well, it's korea" and walked off pretty angry I'd even asked.

[flagged]

Re: Why was there a wall near runway at S Korea plane crash airport?

#279
post #149

The wall is a red herring. The plane landed halfway down the runway at high speed. Something bad is going to happen if you do that at any runway on earth. In SFO you'll end up in the bay or hit the terminal depending on the orientation. In Toronto you'll crash into a highway. Stop looking at the wall and look at the minutes before the crash.

People keep saying that, but I don't see how it's excusable for there to be a massive concrete block against which planes disintegrate at the end of any runway. Maybe everybody would've died some other way, maybe only 10 people would have survived, who knows. But we won't know because somebody put a massive concrete block in the way. We aren't talking about any of your examples in this crash. And it isn't relevant fo…

Apparently it is a structure that holds antennas to keep an aircraft centered on the runway. The antennas have to be there, but experts are saying that the structure supporting the antennas is way over engineered and even internal airport documents had raised concerns about it:

https://www.pbs.org/newshour/show/south-korean-officials-wer...

Re: Why was there a wall near runway at S Korea plane crash airport?

#280
post #99

My wife is South Korean (from andong). I asked her and she looked at me like I'd grown a second head "because it's South Korea? We're a young country and that is tiny airport in the south, half of Korea is a safety hazard and you know that fine well, some freaking idiot put a wall there, oh well, it's korea" and walked off pretty angry I'd even asked.

[flagged]

[deleted]
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