Plane Crash in South Korea

wr8_utd

Ripped :'(
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Apr 22, 2008
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Horrific footage of a crash just an hour ago in South Korea of a Boeing aircraft carrying 181 people. Can only hope, like in the Kazakhstan case, we somehow get survivors.

 
Guess I'll be copying this here from the general CE chat, started writing it while taking my sweet time checking my sources and news and you made the thread in the meantime.
Terrible images coming out of Muan, South Korea today, where Jeju Air Flight 7C2216, a Boeing 737-800 has crashed into a wall after exceeding the maximum length of the runway. There were 181 people onboard, and so far three survivors are being reported. From the footage (warning - graphic video) even those three seem like a miracle.

From the imagery available it is clear that the aircraft landed without landing gear, spoilers or flaps, indicating a possible hydraulics issue, at a very high speed, and despite use of the reverse thrust was not able to stop. It shot past the end of the runway, across the dirt, and impacted a wall a few hundred meters further at still high speed. There is a video of the aircraft suffering an engine malfunction, possibly caused by a birdstrike, shortly before its illfated landing. Furthermore the aircraft squawked 7700, a code used to indicate an aircraft having an emergency, just yesterday, and diverted to Seoul.
 
I guess it's a developing story, but given there were 181 people on board and 62 confirmed dead with reports of just two survivors so far, sounds like that death toll could rise massively.
 
Guess I'll be copying this here from the general CE chat, started writing it while taking my sweet time checking my sources and news and you made the thread in the meantime.
Excuse the ignorance - what is a ‘bird strike’?
 
Flown Jeju air a few times including from Bangkok to Korea. Scary that safe and reputable airlines can still be involved in fatal crashes today, as incredibly rare as they are. RIP to those to died.
 
Horrifying graphics.

Guess I'll be copying this here from the general CE chat, started writing it while taking my sweet time checking my sources and news and you made the thread in the meantime.
The backup systems also failed, do you think?
 
Flown Jeju air a few times including from Bangkok to Korea. Scary that safe and reputable airlines can still be involved in fatal crashes today, as incredibly rare as they are. RIP to those to died.

A not even 20 year old low cost airline is hardly what I would consider safe or reputable.

Let's wait for the investigation, but let's not rule out pilot error or lack of maintenance.

RIP to the victims.
 
Flown Jeju air a few times including from Bangkok to Korea. Scary that safe and reputable airlines can still be involved in fatal crashes today, as incredibly rare as they are. RIP to those to died.
Literally flew from bkk to Seoul a few days ago but on Thai airways. So tragic for the victims and their families. RIP
 
Horrifying graphics.


The backup systems also failed, do you think?
It is currently extremely hard to say what happened. The flight data shown in flightradar24 cuts out a good bit before touchdown, while the aircraft on approach to runway 01. Flightradar says that they are now processing the raw ADS-B data so I expect an update there soon-ish. The actual landing and crash however then occured on Runway 19 - which is the same runway, but from the opposite direction. So right now it looks like they might have suffered the birdstrike on the initial approach, aborted the landing, turned the aircraft around and landed from the other side.

As to why they did not have flaps set or the gear down, nobody can currently understand why that is the case. The aircraft has three different hydraulics circuits, and even if due to some reason all three of them failed, they would have been able to operate the flaps with electric motors, which is slow but works, and they could gravity-drop the landing gear without any hydraulics, too. Why none of that was done is currently a mystery, I hope that flight data recorder and voice recorder will clear that up once evaluated.
 
A not even 20 year old low cost airline is hardly what I would consider safe or reputable.
Erm what? Near enough every airline in the sky is safe and reputable. Why would the fact it’s been operating for 20 years or the fact it’s low cost have anything to do with the level of safety?
 
Erm what? Near enough every airline in the sky is safe and reputable. Why would the fact it’s been operating for 20 years or the fact it’s low cost have anything to do with the level of safety?
Agree. All adhere to the same rules and regulations.
 
It appears there was a bird hit which impacted the engine. Not quite sure why the landing gear didn't work?
 
They have apparently already recovered the flight data recorder, but not yet the cockpit voice recorder. That is going to be important to recreate how so many systems which are independent of each other could fail at the same time. I struggle to see anything that could cause all of the systems and their backups, like a physical steel cable from the cockpit to the landing gear, to fail all at the same time.

The two survivors are both cabin crew who sat at the tail end of the aircraft. Weather seems to not have been a factor as visibility was excellent, only a few clouds at 4500 feet far above the airport, and winds a non-issue at only two knots.
 

If you read this thread, others link to a news article about the plane landing at a different airport cos of a medical emergency with a passenger.
 
1. why didnt they manually deploy the landing gear if the hydraulics failed
2. why didnt they try to get to a longer runway (explosion suggests a lot of fuel on board)

Seems like there has to be significant pilot error there somewhere but I guess time will tell.
 
Agree. All adhere to the same rules and regulations.

No they don't.

Far too early to know what happened here but a bird strike doesn't stop flaps, landing gear etc being deployed.

I hope it's not another Pakistan Airlines.
 
A not even 20 year old low cost airline is hardly what I would consider safe or reputable.

Let's wait for the investigation, but let's not rule out pilot error or lack of maintenance.

RIP to the victims.

I was just saying that the survival rate in the Embraer was amazing a few days ago...

Then this Boeing 737...
 
1. why didnt they manually deploy the landing gear if the hydraulics failed
2. why didnt they try to get to a longer runway (explosion suggests a lot of fuel on board)

Seems like there has to be significant pilot error there somewhere but I guess time will tell.

It's weird that reports implying that a bird strike caused the hydraulic failure of the landing gears. Engine flame out maybe. But affecting the landing gears?
 
They have apparently already recovered the flight data recorder, but not yet the cockpit voice recorder. That is going to be important to recreate how so many systems which are independent of each other could fail at the same time. I struggle to see anything that could cause all of the systems and their backups, like a physical steel cable from the cockpit to the landing gear, to fail all at the same time.

The two survivors are both cabin crew who sat at the tail end of the aircraft. Weather seems to not have been a factor as visibility was excellent, only a few clouds at 4500 feet far above the airport, and winds a non-issue at only two knots.

Back of the plane has always the highest survival rate. Not so for the front, 1st class passengers
 
It's weird that reports implying that a bird strike caused the hydraulic failure of the landing gears. Engine flame out maybe. But affecting the landing gears?
An uncontained engine failure where broken-up parts penetrate outside the engine could take out hydraulic lines. Engines are built to contain such failures where possible, but it does not always work. That one is not so weird. It'd be odd and very unlucky how that could take down both A and B hydraulic systems as well as the standby reservoir, though.

What's hard to imagine is how that would take out the electrical system as well and somehow stop three seperate cables to deploy the landing gear manually from working.
Back of the plane has always the highest survival rate. Not so for the front, 1st class passengers
Center of the plane is apparently the worst survival rate. Which makes sense as you are sitting above and between the fuel, and if a fire makes the emergency exits unavailable you have the furthest to go to get to the exits at the front and aft.
 
An uncontained engine failure where broken-up parts penetrate outside the engine could take out hydraulic lines. Engines are built to contain such failures where possible, but it does not always work. That one is not so weird. It'd be odd and very unlucky how that could take down both A and B hydraulic systems as well as the standby reservoir, though.

What's hard to imagine is how that would take out the electrical system as well and somehow stop three seperate cables to deploy the landing gear manually from working.

Center of the plane is apparently the worst survival rate. Which makes sense as you are sitting above and between the fuel, and if a fire makes the emergency exits unavailable you have the furthest to go to get to the exits and the front and aft.

Cheers! Good to know
 
An uncontained engine failure where broken-up parts penetrate outside the engine could take out hydraulic lines. Engines are built to contain such failures where possible, but it does not always work. That one is not so weird. It'd be odd and very unlucky how that could take down both A and B hydraulic systems as well as the standby reservoir, though.

What's hard to imagine is how that would take out the electrical system as well and somehow stop three seperate cables to deploy the landing gear manually from working.

Center of the plane is apparently the worst survival rate. Which makes sense as you are sitting above and between the fuel, and if a fire makes the emergency exits unavailable you have the furthest to go to get to the exits at the front and aft.

You can see from the video it was not an uncontained engine failure though. Even if it was the chances of everything failing at once are vanishingly small.
 
I thought bird strikes would usually be at a level where landing gear is already deployed?
 


The concrete barrier seems to be a massive contributing factor to the fatality. Its not 'standard practice' to have such a robust barrier at the end of the runway.
 
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So biggest questions are why was there absolutely no sign of landing gear/hatch being opened, and why on earth was a radar installation basically an impenetrable brick wall.

Yeap. A bird strike would have eliminated all landing gear considering the redundancies involved.

The concrete block wasnt even a radar installation. Its just part of the runway landing guidance system. The poor pilots must have thought they had done a perfect landing in view of the circumstances --- until they saw that concrete block at the end of the runway. That 'oh feck' moment.
 
No they don't.

Far too early to know what happened here but a bird strike doesn't stop flaps, landing gear etc being deployed.

I hope it's not another Pakistan Airlines.
Do they not? There are universal regulatory bodies that oversee these things - are they ineffectual at actually regulating?
 
Yeap. A bird strike would have eliminated all landing gear considering the redundancies involved.

The concrete block wasnt even a radar installation. Its just part of the runway landing guidance system. The poor pilots must have thought they had done a perfect landing in view of the circumstances --- until they saw that concrete block at the end of the runway. That 'oh feck' moment.
Given it was still at high speed, what would have happened if that wall wasn't there? What was outside the airport wall?
 
You can see from the video it was not an uncontained engine failure though. Even if it was the chances of everything failing at once are vanishingly small.
That is not visible at all, you could not spot a possible small fan blade fragment penetrating outwards from that far away with that video quality. An uncontained engine failure doesn't mean that the entire thing explodes and bursts into flames. Not every uncontained engine failure is a catastrophic one, visually. It needn't even penetrate outside the nacelle to do damage to the hydraulics, as the hydraulic lines also run inside the nacelle.
I thought bird strikes would usually be at a level where landing gear is already deployed?
The risk of bird strikes is highest within a several hundred feet of the ground, but can occur significantly above that as well. It depends on the region and the time of the year. Here's a table from an older study limited to the USA:
08OTC7Z.jpeg

While the number decreases drastically the higher above ground you get, the risk is far from gone. That's still more than 2600 bird strikes at an altitude of over 3500 feet above the ground.

Given it was still at high speed, what would have happened if that wall wasn't there? What was outside the airport wall?
The airport perimeter wall, and then a road and fields.
 
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Given it was still at high speed, what would have happened if that wall wasn't there? What was outside the airport wall?

The outer wall was made of cinder blocks. I am sure that would have cushioned the slide somewhat. But instead the plane crached into an inpenetrable wall that was basically holding up a set of landing beacons only.