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haunter a day ago

Video of the crash, left (?) engine was already engulfed in flames while taking off

https://x.com/BNONews/status/1985845907191889930

https://xcancel.com/BNONews/status/1985845907191889930

Edit: just the mp4 https://video.twimg.com/ext_tw_video/1985845862409334784/pu/...

There is an incredible amount of ground damage! Just wow, this is very bad https://files.catbox.moe/3303ob.jpg

justsid a day ago | parent | next [-]

The damage on the ground is scary to look at. I think the only silver lining here is that it was "just" a sparser industrial area and there weren't any homes. I'm really curious about what the investigation will reveal in a few months. This doesn't look like a "regular" engine fire from a bird strike or so, you would normally expect the flames to come out the back and not over the wing. And at least in theory the MD-11 should be flyable with just two engines, although flames on a wing is probably "really really bad" just by itself already. Too early to speculate about what happened though.

JCM9 a day ago | parent | next [-]

Zoning guidance generally prohibits land use near an airport that has a high density of people, precisely to limit casualties during an event like this. Industrial would be permitted while residential and commercial use is not.

Scarily there are communities that have ignored such logic and permitted dense residential development right next to an airport.

silisili 15 hours ago | parent | next [-]

UPS actually bought and destroyed thousands of homes near their end of the airport about 20 years ago, under the guise of 'noise', but realistically for expansion of warehousing. Now, I guess I feel slightly less upset by that (my childhood home was one of them).

Ferret7446 2 hours ago | parent [-]

Both can be true at the same time (or all three if you include safety in addition to noise).

silisili 2 hours ago | parent [-]

True, but rather doubtful. UPS has owned that part of the airport for longer than I've been alive. As a kid, yeah sometimes a plane comes over but nobody really seemed to care.

Fast fwd 15 years and now the city is telling us how unsafe it is to live there, passing out studies about how airplane noise will ruin your life, etc. And they made the buyout 'optional', knowing they'd railroad the holdouts, which they did. They'd tear down every house and the road leading to your house as they went, until the holdouts gave in.

All of a sudden my neighborhood is gone. And that awful, noisy, unsafe to live in place...is full of workers in cheap steel warehouses. I guess it's more safe for them.

Many people may not realize, but UPS and Ford absolutely own Louisville. If either says jump, the city government will ask how high?

Moto7451 20 hours ago | parent | prev | next [-]

Jets are also simply too loud for homes under the takeoff path in standard use. There’s what amounts to a ghost town next to LAX due to this and the history of the airport.

https://en.wikipedia.org/wiki/Palisades_del_Rey,_California

Burbank Airport has quiet hours and has left a bunch of commercially zoned area under that takeoff path.

I’m in Atlanta now and they bought up a lot of land around the airport when redeveloping it and do similar zoning tricks for the buffer. One of the buffer zones is the Porsche Experience. It’s loud as heck when you’re on the part of the track closest but not bad where the corporate HQ and paddock is

jcurbo 9 hours ago | parent | next [-]

That's wild, I was in LA recently for work and drove by that area and wondered what was up with the street grid. I figured it must be something like this given the airport.

tharkun__ 13 hours ago | parent | prev | next [-]

I just looked that up (Atlanta) on https://noise-map.com/ and man, that's way not enough zoning tricking in my book. Not that it's much different in other cities (or countries).

fortran77 15 hours ago | parent | prev | next [-]

I grew up 3 miles (as the crow flies) from JFK Runway 31 R / 13 L in Cedarhurst, New York

https://www.google.com/maps/dir/Cedarhurst,+NY+11516/John+F....

duped 16 hours ago | parent | prev [-]

Meanwhile, ORD is surrounded by residential areas and they're building a new tollway perpendicular to the runways

caseyohara 11 hours ago | parent [-]

MDW immediately came to mind as an airport closely surrounded by neighborhoods. I've always wondered what it's like to live in one of those neighborhoods. Is it a perpetual nuisance or do you get used to it?

tharkun__ 11 hours ago | parent [-]

Not at MDW but there are plenty such places and yes, some people do "get used to it". But there are studies that show that you increase health risks from such levels of noise even if you get used enough to it so that you can sleep through them. Search for increases in problems of cardiovascular health from car and plane noise.

And some people just won't really get used to it. I've lived near airplane noise and I never got used to it. I also don't sleep better with white noise. I sleep worse.

rpcope1 18 hours ago | parent | prev | next [-]

It's amazing that towns don't see this sort of thing and think "huh maybe it's not a good idea to put apartments right on top of an airport", but I guess they don't. Longmont is in trouble with the FAA because they OKed a bunch of apartments right at the end of Vance Brand that would be right in the path of aircraft struggling to gain altitude out of the airport. Naturally there's a vocal contingent of people around here that think this is the airport's problem and not the town or greedy developers, and that all the airports (except DIA) should be shut down.

potato3732842 a day ago | parent | prev | next [-]

You can always come up with some pretext to justify things by ignoring the other side of the equation.

How many lives do the man hours spent commuting, or toiling away to afford higher rents waste?

IDK how the math pencils out, but an attempt ought to be made before drawing conclusions.

Retric 20 hours ago | parent | next [-]

None? Nobody puts airports inside city centers and metro areas don’t just have dense urban housing. The common solution in many land strapped cities is for airports to rout aircraft over water often by building airports on reclaimed land.

What generally gets areas in trouble is locations that used to be a good get worse as aircraft get larger and the surroundings get built up. The solution is to send larger airplanes to a new airport, but it’s not free and there’s no clear line when things get unacceptably dangerous.

nostrademons 20 hours ago | parent | next [-]

San Jose does. You can, in theory, walk to downtown from the airport; it's about an hour and a half via pedestrian trail:

https://maps.app.goo.gl/zhZdA5tWGAKunM2e8

(This is widely considered a misfeature of San Jose - it limits the height of buildings in downtown San Jose to 10 stories because the downtown is directly under the flight path of arriving flights, it limits runway length and airport expansion, and it means that planes and their noise fly directly over key tourist attractions like the Rose Garden and Convention Center. If we ever had a major plane crash like this one in San Jose it would be a disaster, because the airport is bounded by 101 on the north, 880 on the south, the arriving flight path goes right over downtown, and the departing flight path goes right over Levi's Stadium, Great America, and several office buildings.)

Retric 19 hours ago | parent | next [-]

There’s roughly a mile of roads, green spaces, and river between the airport and downtown San Jose which an absolutely identical accident would impact. It’s not very wide, but pilots aren’t going to aim for buildings if they can help it.

So while downtown being in the flight path is a risk there was some method to the madness which caused that alignment.

jonas21 18 hours ago | parent [-]

San Diego's airport, on the other hand, has the a bustling restaurant district, an interstate with frequent bumper-to-bumper traffic, and a dense residential neighborhood all within a mile off one end of the runway -- and a popular shopping area, an elementary school, and a high school within just over a mile from the other end.

In addition, the terrain rises in both directions (so sharply on one side that planes can't use ILS when landing from that direction).

DiggyJohnson 13 hours ago | parent | next [-]

The fact that San Diego operates essentially downtown with a single runway is a marvel, even if it does cause issues. I hope they get the tram extension one day.

Retric 18 hours ago | parent | prev [-]

Agreed, and clearly there’s a bunch of much safer options. The north island air station base is close and almost comically better.

Johnny555 16 hours ago | parent | prev | next [-]

The Las Vegas Airport is very close to the strip, surrounded by residential neighborhoods and hotels about 1/4 - 1/2 mile from the airport, and UNLV university is about 1000 feet in a straight line from one of the runways.

bdamm 16 hours ago | parent | prev [-]

San Jose Airport's walkability and bikability is actually wonderful and I always take the opportunity to walk or bike there when flying into SJC.

Arainach 20 hours ago | parent | prev | next [-]

>None? Nobody puts airports inside city centers and metro areas don’t just have dense urban housing.

https://en.wikipedia.org/wiki/Midway_International_Airport

It's hard to project growth. Things build right up to the limit of the airport for convenient access, then the area grows and the airport needs to grow - and what do you do? Seattle-Tacoma is critically undersized for the traffic it gets and has been struggling with the fact that there's physically nowhere to expand to.

eitally 14 hours ago | parent | next [-]

Congonhas (the original Sao Paulo airport) is right in the middle of the city.

There was a significant crash there in 2007: https://en.wikipedia.org/wiki/TAM_Airlines_Flight_3054

Retric 20 hours ago | parent | prev [-]

Zoning is one option to direct growth, but you can move airports. Chicago is right next to a Great Lake and there’s relatively shallow areas ready to be reclaimed etc.

Obviously you’re better off making such decisions early rather than building a huge airport only to abandon it. Thus it’s called urban planning not urban triage.

Arainach 14 hours ago | parent | next [-]

Move them to where? Cities large enough to merit an airport generally either have development which has expanded around them or physical features not conducive to development (mountains, lakes, etc.).

It's easy to say "just build bigger elsewhere" but unless you go dozens of miles out and add hours to every trip to/from the airport there's no options.

And no, "just fill in every body of water" is not an option. It doesn't work at all in many cases, is hilariously expensive in all cases, and has enormous environmental impact.

Retric 11 hours ago | parent [-]

I’m specifically suggesting using reclaimed land if they relocated the airport because the cost seems to work out for Chicago, though obviously an in depth analysis is necessary. Still just looking at the depths combined with lakes not having the downsides of open oceans makes it promising. Unfortunately we’re talking about a huge airport so moving anywhere gets incredibly expensive.

The ultimate reason so many cities use land reclamation for airports is open water does not lose property value by being near the airport. Thus a given greater metropolitan area regains not just the physical land of the airport but the increased property value from all that land that’s no longer next to an airport.

potato3732842 19 hours ago | parent | prev | next [-]

>Zoning is one option to direct growth

My magic crystal ball named "the past 50yr of history" says it is unlikely to be the success you envision.

DiggyJohnson 13 hours ago | parent | prev [-]

There’s a real convenience to an airport not being 50 minutes away

matt-p 13 hours ago | parent | prev | next [-]

In all honesty most countries in europe have at least one airport in a city centre. I mean look at lisbon, RKV, BHD/LCY (even glasgow,LHR to some extent), BMA, NCE.

ilamont 14 hours ago | parent | prev | next [-]

> Nobody puts airports inside city centers

Taipei Songshan, Boston Logan and the old Hong Kong Kai Tak to name a few.

Retric 14 hours ago | parent [-]

Boston Logan is surrounded by water to the point only one end of a single runway isn’t aimed directly at water soon crosses water. The city center requires crossing a bridge. Taipei is a little worse but its only runway is going next to a river here and aimed at a park on each side.

Hong Kong Kai Take would be a solid example except it closed in 1998 because of how the city grew. Look at maps from 1950 and it doesn’t look like a bad location for a small airport.

ilamont 10 hours ago | parent [-]

> The city center requires crossing a bridge.

It actually requires using tunnels or a boat. I used to drive a cab and the I93 + Callahan/Sumner tunnel route was hellish. The Big Dig helped a lot, although sometimes that can get pretty backed up too.

> Look at maps from 1950 and it doesn’t look like a bad location for a small airport.

Generally, airports that are close to major urban centers were developed prior to 1950, including all 3 examples named. Songshan was opened during Taiwan's colonial period as the “Matsuyama Airdrome” serving Japanese military flights (https://www.sups.tp.edu.tw/tsa/en/1-1.htm).

For bigger cities with these old central airports, larger airports were opened later in many cases. I don't think that will ever happen in Boston, although satellite airports in neighboring states like "Manchester-Boston" or TF Greene in Rhode Island try pretty hard.

gwbas1c 20 hours ago | parent | prev | next [-]

> The common solution in many land strapped cities is for airports to rout aircraft over water.

That works in costal areas, but not inland.

There's no large body of water near the Louisville airport.

Retric 20 hours ago | parent | next [-]

The Ohio River is a large body of water fairly close if someone was going to relocate Louisville airport.

WorldMaker 18 hours ago | parent | next [-]

The Ohio River is a mile wide at Louisville, but that still doesn't wide enough to classify it "large body of water", especially because it is a river that moves relatively quick for its width and then hits falls/rapids just downstream of Louisville.

But also there's a lot of urban and suburban development you'd have to displace to even consider moving the airport near the Ohio River for most miles both up and down stream of Louisville.

Retric 16 hours ago | parent | next [-]

Tradeoffs. Physical land under the airport is lost either way, but land near the old airport becomes more useful where the river itself couldn’t have buildings in either situation. Thus moving it near a river or other large body of water is a long term net gain.

As to a crash, ditching into an industrial area isn’t significantly worse for the passengers than ditching into a set of rapids, but the rapids are far better for the general public.

WorldMaker 15 hours ago | parent [-]

To be fair to this specific airport, the industrial area South of the airport is almost entirely UPS Airlines facilities. The safety hazard posed by the UPS Airlines flight crash was primarily to UPS Airlines warehouses and warehouse workers. They made their own tradeoffs in this case of what they placed close to their own runways (including apparently they had a fuel recycling plant not far from the crash line that made firefighting more complicated). Sure it's still very different from a large body of water, but it's also certainly not like the land was entirely a general usage industrial area either.

Had the crash happened in a different direction there might be other complaints, sure, but even airports with large bodies of water neighboring them only generally neighbor a side or two.

johann8384 16 hours ago | parent | prev [-]

It's not even a mile wide here. The widest spot I measured just east of the falls was 0.75, at Utica it is 0.34 and at Westport it's 0.39.

mywittyname 15 hours ago | parent | prev [-]

I don't think effectively damming (alternatively, rerouting) the Ohio River is a solution to relocating an airport in Louisville. That's a wildly ambitious undertaking compared to most other land reclamation projects.

Yeah, the terrain around Louisville poses a challenge for placing an airport, but they could do like Cincinnati does, and have their airport located across the river. Or place it between Frankfurt and Louisville. Or do like Pittsburg and make the terrain flat enough for an international airport.

wongarsu 20 hours ago | parent | prev [-]

Inland it can work if you have a river. London City Airport would be an example

vel0city 18 hours ago | parent | prev [-]

> Nobody puts airports inside city centers and metro areas don’t just have dense urban housing

Ever see Dallas Love Field?

https://maps.app.goo.gl/A94EdexYwfpyeMxa7

Lots of airports are pretty much immediately adjacent to their city centers.

chronciger 21 hours ago | parent | prev [-]

[flagged]

Thorrez a day ago | parent | prev | next [-]

Probably also due to noise.

SilasX 18 hours ago | parent [-]

Yeah I was going to say, that sounds like a much more salient reason not to live near an airport than the possibility of that rare crash.

pksebben 16 hours ago | parent | prev | next [-]

Fresno here. If this had happened at FAT (FYI now? We have dumb names) the casualties would've easily hit three digits from initial impact, and then whatever else burned afterwards because CA==tinderbox.

eitally 14 hours ago | parent [-]

Same with SJC, no matter which direction they were taking off.

pkulak 14 hours ago | parent | prev | next [-]

Midway comes to mind: https://maps.app.goo.gl/GRUXJVdUPQMWkZNU6

andrepd 20 hours ago | parent | prev | next [-]

The pollution and noise probably has health effects many times more significant than the sum of extremely rare crashes like these.

ChrisMarshallNY a day ago | parent | prev [-]

> Zoning guidance generally prohibits land use near an airport that has a high density of people

Queens, NY has entered the chat…

chronciger 21 hours ago | parent | next [-]

>Queens, NY has entered the chat…

You’re correct, but at least LaGuardia airport generally has takeoffs over water.

LaGuardia aircraft landings may happen over dense apartment buildings, but less likely for catastrophic damage (glide path, less fuel, engines are <10% throttle, etc)

ChrisMarshallNY 18 hours ago | parent [-]

It also has JFK, on the South side.

globular-toast a day ago | parent | prev [-]

Some of the larger townships in Cape Town are right in the flight path too. Not many white people there either.

Jtsummers a day ago | parent | prev | next [-]

> And at least in theory the MD-11 should be flyable with just two engines

Flying with two engines and taking off without an engine in a loaded aircraft are two very different things. A lot more thrust is needed during takeoff than after.

filleduchaos a day ago | parent | next [-]

Taking off with one engine inoperative (on a multi-engine aircraft, obviously - you aren't going to get anywhere with your only engine gone) is completely normal/within design parameters, albeit undesirable.

In fact, it being normal almost certainly contributed to the scale of this accident, since a single engine failure during the takeoff roll isn't considered enough of an emergency to reject the takeoff at high speed (past a certain speed, you only abort if the aircraft is literally unflyable - for everything else, you take the aircraft & emergency into the air and figure it out there). The crew wouldn't have had any way to know that one of their engines had not simply failed, but was straight-up gone with their wing on fire to boot.

Jtsummers a day ago | parent [-]

> The crew wouldn't have had any way to know that one of their engines had not simply failed, but was straight-up gone with their wing on fire to boot.

I don't know about the MD-11 itself, but other aircraft from that time period have sensors to detect and report overheat and fire in various parts of the aircraft, including engines and wings.

filleduchaos a day ago | parent | next [-]

Well, there's a very big difference between "Engine fire: some of the combustion chamber's heat and flame has breached containment" and, say, "Engine fire: the engine has exploded, catastrophically damaging your wing which is now visibly on fire". However, both things are reported in the cockpit as ENG FIRE.

There's also a very big difference between "Engine failure: something has damaged or jammed enough components that the turbines are no longer spinning fast enough to produce thrust or drive the generators" and "Engine failure: the engine is no longer attached to the aircraft, which is why it is no longer producing thrust". However, both things are reported in the cockpit as ENG FAIL.

(Un)fortunately, cockpit warnings prioritise the what (so to speak) and not the how or why. On one hand, this makes decision-making a lot simpler for the crew, but on the other...well, in rare cases the lack of insight can exacerbate a disaster. Depending on when exactly the engine gave out, this poor crew might have been doomed either way, but they might have been able to minimise collateral damage if they knew just how badly crippled the aircraft was. And there was a very similar accident to this one (actually involving the predecessor of the MD-11, the DC-10), American Airlines 191 - one of the engines detached from the aircraft, damaging the leading edge of its wing in the process, causing that wing to stall when the crew slowed down below the stall speed of the damaged wing in a bid to climb. If they could have somehow known about the damage, the accident might have been avoided entirely as the crew might have known to keep their speed up.

ragazzina a day ago | parent | next [-]

> There's also a very big difference between "Engine failure: something has damaged or jammed enough components that the turbines are no longer spinning fast enough to produce thrust or drive the generators" and "Engine failure: the engine is no longer attached to the aircraft, which is why it is no longer producing thrust". However, both things are reported in the cockpit as ENG FAIL.

What is the difference?

HPsquared a day ago | parent | next [-]

Wider effects like damage to the wing or changes to aerodynamics.

Edit: and damage to other engines, possibly engine #2 in the tail ingesting debris in this instance.

bombcar a day ago | parent [-]

That's the biggest, the weight gone entirely unbalances the plane; if you knew exactly what happened you MIGHT be able to keep it level (and it seems they did for a bit) but eventually airspeed drops, it tips, and cartwheels (which is apparently what it did from the videos).

Modified3019 a day ago | parent | next [-]

The aircraft hit the roof of a UPS warehouse, barely clearing it before coming down in the parking lot/junkyard nearby. So when we see it turning over in its last seconds (like the trucker dash cam video), it only had one wing at that point.

19 hours ago | parent [-]
[deleted]
beerandt 19 hours ago | parent | prev [-]

Deadweight or no-weight engine is a relatively negligible problem in terms of the weight-balance envelope.

Cut fuel & hydraulic lines near that engine (that affect the other engines/ apus) (or less likely structural or aerodynamic problems) is what's going to shift this from "engine failure" recoverable problem to a global nonrecoverable one.

mvkel 20 hours ago | parent | prev | next [-]

It's the difference between "I can't walk because my leg fell asleep"

and

"I can't walk because I have no legs"

tzs 11 hours ago | parent | prev | next [-]

A good example of the difference it can make was the Flight 191 crash in Chicago in in 1979, which had an engine come off on takeoff: https://en.wikipedia.org/wiki/American_Airlines_Flight_191

The engine coming completely off tore through hydraulic lines, which were need to keep the slats extended. Airflow forced the slats to retract.

Here's what then happened:

> As the aircraft had reached V1, the crew was committed to takeoff, so they followed standard procedures for an engine-out situation. This procedure is to climb at the takeoff safety airspeed (V2) and attitude (angle), as directed by the flight director. The partial electrical power failure, produced by the separation of the left engine, meant that neither the stall warning nor the slat retraction indicator was operative. Therefore, the crew did not know that the slats on the left wing were retracting. This retraction significantly raised the stall speed of the left wing. Thus, flying at the takeoff safety airspeed caused the left wing to stall while the right wing was still producing lift, so the aircraft banked sharply and uncontrollably to the left. Simulator recreations after the accident determined that "had the pilot maintained excess airspeed the accident may not have occurred.

potato3732842 a day ago | parent | prev | next [-]

>What is the difference?

Wanting to be in the air vs wanting to over-run the end of the runway.

singleshot_ 21 hours ago | parent | prev [-]

Hydraulic pressure

eternityforest a day ago | parent | prev [-]

Could they add cameras to solve this issue?

roryirvine a day ago | parent | next [-]

During engine failure / fire situations, I would expect that pilots are likely to be too busy to have any time left over for peering at a video feed, trying to assess the state of the wing.

In emergencies, information overload tends to make things worse, not better.

ExoticPearTree a day ago | parent [-]

Having cameras pointed at the engines/wings like rearview mirrors would be helpful. It does not add that much workload if you take a quick glance in the “mirror” and figure out what the problem exactly is.

And now we have technology that allows for cameras everywhere to give a better situational awareness across all critical aircraft surfaces and systems.

It is going to take a little bit of adjusting to, but it will help improve safety in a tremendous way.

cedilla a day ago | parent | next [-]

This would need to be tested. There's a lot going on already during normal take-offs. Now you're in a situation where the engine fire alarm is going off, probably a few other alarms, you got so many messages on your display that it only shows the most urgent one, you're taking quick glances at 50 points in the cockpit already.

And how would the cameras even work? Are the pilots supposed to switch between multiple camera feeds, or do we install dozens of screens? And then what, they see lots of black smoke on one camera, does that really tell them that much more than the ENG FIRE alert blaring in the background?

Maybe this could help during stable flight, but in this situation, when the pilots were likely already overloaded and probably had only a few seconds to escape this situation - if it was possible at all - I can't imagine it being helpful.

ExoticPearTree a day ago | parent | next [-]

You know how the tail camera works on the new planes? Something like that, which can be far away from the wings, but get the full picture. Am I saying it's the solution for everything? No. But after you go through the memory committed items during an emergency, you can take a look outside and be like "ah, I see better what the problem is".

If we don't try to see how it goes, we won't know if it is a good idea or not.

wongarsu a day ago | parent | prev [-]

It'd certainly need more thought put into it than just showing the camera view from the entertainment system. Either just one camera on the tail pointed forwards, so you have one single camera that can show the whole plane, or two cameras in the front, one pointed at each wing. Two cameras is worse than one, but they are less likely to be affected by smoke or blood splatters or whatever. Maybe give each pilot one of the camera feeds. And you'd have to fit a dedicated screen for the video feed so pilots don't need to switch through screens in an emergency.

It'd take lots of testing and engineering. But especially in cases where you have multiple warnings going off I imagine that a quick view at an exterior camera can often give you a clearer/faster indication of the situation

krisoft a day ago | parent | prev [-]

> Having cameras pointed at the engines/wings like rearview mirrors would be helpful.

Helpful in what way? What are the pilots going to do with the information?

ExoticPearTree a day ago | parent [-]

They won't have to rely on cabin crew description of what they see over the wings or have to send one of the pilots to take a look (see UA1175).

sim7c00 a day ago | parent | next [-]

its super weird to me this isn't a thing, and there's resistence to the idea. I mean, if they are already masters at glacing at 100000 differnent indicators and warning messages etc. and processing them at super speeds (they really do!) then i'd say a monitor with a bunch of buttons below it to switch feeds (maybe a little more elaborate, but not tooo...) would be helpful.

the problem might be getting trained and experienced pilots to adjust to it since they are already in a certain flow of habits and skills to apply in their job, but new pilots surely could learn it as they aren't so set on their ways yet and have the opportunity to build this new data into their skillset / habits.

throwway120385 19 hours ago | parent | next [-]

Look, information overload is a real problem. Medical devices are an analogous industry in that in an emergency nurses and doctors are getting completely bombarded with alarm tones, flashing lights, noise, and also whatever is going on with the patient. There are standards in that industry governing how you alarm, what your alarm tones sound like, what colors you're supposed to use, how fast you're supposed to flash, and so on. And people still miss alarms because there are still a ton of them all going off at once.

People have an upper limit on their capacity to take in information, and that limit goes down when they are moving quickly to solve problems. Throwing more information at them in those moments increases the risk that they will take in the wrong information, disregard more important information, and make really bad decisions.

So no, it's not cut and dried like you're thinking.

bronson 20 hours ago | parent | prev | next [-]

Pilots are already overloaded so we can probably overload them a little more?

cmurf 19 hours ago | parent | prev [-]

The entire event was over in less than a minute, and during that time there’s only one thing pilots are working on: maintaining what little control they have, and gaining as much altitude as possible without loss of control.

This is consuming all mental processing, there are no spare cycles.

This wasn’t a salvageable situation by having more information after the engine separated. If a sensor could have provided a warning of engine failure well before V1, that would be helpful.

I expect the questions will focus on what information existed that should have resulted in aborting the takeoff. Not what information was needed to continue.

krisoft a day ago | parent | prev | next [-]

Okay. So you mean in general it would help in some cases. Not that in this case it would have helped.

> see UA1175

I'm familiar with the case you are mentioning. I'm also aware that they sent a jump seater to look at the engine. But did seeing the engine provide them with any actionable information? Did they fly the airplane differently than if they would have just seen the indications available in the cockpit?

ExoticPearTree 19 hours ago | parent [-]

Yes, the cameras would not have helped here, but it dorsn’t mean they are useless in general.

Stupid car analogy: airbags help in most cases, but not all. Are they useless?

Regarding UA1175, they had someone extra, but not all flights happen to have someone extra in the cockpit.

kelnos 13 hours ago | parent | next [-]

> Yes, the cameras would not have helped here, but it dorsn’t mean they are useless in general.

I think that statement needs the support of actual evidence. Air incident investigation agencies make detailed reports of the causes of crashes, with specific, targeted recommendations to help ensure that similar incidents don't recur.

If we haven't seen recommendations for cameras like that, then I think it's reasonable to assume that the actual experts here have determined that cameras would not be helpful.

ExoticPearTree 2 hours ago | parent [-]

FAA/EASA can dictate what equipment new airplans should/must have. And that is done in cooperation with the manufacturers. And manufacturers have zero incentives to add new equipment, airlines zero desire to do additional certifications for pilots.

It is not reasonable to assume anything.

Air crash investigators are not the experts on airplanes design.

krisoft 18 hours ago | parent | prev [-]

> airbags help in most cases, but not all.

Excellent. So in what cases does seeing the engine visually do help? So far we discussed UPS2976 and UA1175 where the presence or absence of the camera didn't change the outcome.

> Regarding UA1175, they had someone extra, but not all flights happen to have someone extra in the cockpit.

You are dancing around my question. What does the pilot do differently based on what they see? If you can't articulate a clear "pilot sees X they do Y, pilot sees Z they do Q" flow then what is the video good for?

in a sibling thread you say "There are countless situations where it can be helpful." But you haven't named even one of those countless situations yet.

ExoticPearTree 14 hours ago | parent | next [-]

Let's say there is a case like UA1175: - they can see how damaged the engine is - they can see if the wing is damaged in any way (over and under) - is there any other damage to the aircraft (like there was a piece of shrapnel that hit the plane)

In other situations: - are the wheels out when the sensors say they are not - have a way to visually inspect critical parts of the plane while in flight (so you don't have to do a flyover and the tower to look with binoculars at the airplane)

This is what comes to mind now.

Happy? Or am I still dancing?

filleduchaos 12 hours ago | parent | prev [-]

> So far we discussed UPS2976 and UA1175 where the presence or absence of the camera didn't change the outcome

To be fair, the presence of a camera might have changed the outcome of UPS2976. Depending on when the fire developed fully, rejecting the takeoff based on the sheer size of the fireball on the wing might have led to fewer casualties on the ground. This is of course under the assumption of a world where a camera feed is a normal part of the flight deck instruments and there is a standard for the pilot monitoring to make judgments based on it.

lazide 21 hours ago | parent | prev [-]

Sure, but in this situation there is zero time for any of that.

ExoticPearTree 19 hours ago | parent [-]

There are countless situations where it can be helpful. You don’t have to focus on a particular one where this would not be of any use.

lazide 19 hours ago | parent [-]

Sure, but we’re literally in the thread discussing the exact situation it wouldn’t be helpful in haha

zuppy a day ago | parent | prev [-]

They surely can and this has been done. On one the flights that I took with Turkish Airlines they had a few video streams from different sides of the airplane. One was from the top of the tail and you could see the entire plane.

Now... not sure how much that is helpful in this kind of emergency, they really didn't have time to do much.

fredoralive a day ago | parent [-]

I'm not sure they usually have the views on screen in the cockpit in flight, even if available (and an old MD-11 freighter won't have the cameras in the first place). The picture of an A380 cockpit (on the ground) on Wikipedia does show the tail view on a screen, but its on the screen normally used for main instruments. With an A380 that had an uncontained engine failure causing various bits of havok (Qantas 32?) IIRC the passengers could see a fuel leak on the in flight entertainment screens, but they had to tell the crew as AFAIK they didn't have access to the view in the cockpit in flight.

kelnos 13 hours ago | parent | prev | next [-]

I think too many of us are used to movies and TV (and Star-Trek-like scifi) that gives the incorrect view that extremely detailed information about the state of things is available.

The notification in the cockpit is likely nothing more than "ENG 2 FIRE" or similar. That could mean anything from "the fire is minor enough and we're at high enough speed that it's significantly safer to take off and then make an emergency landing", to "the engine has exploded and the wing is on fire and catastrophically damaged, so even though aborting takeoff now is dangerous and will likely cause us to overrun the runway, trying to continue would be worse".

It's a judgment call by the pilot to guess which of these is the case (or any possibility in between), and given the probabilities of various failure modes, I think it's fair for a pilot to assume it's something closer to the former than the latter.

Jtsummers 8 hours ago | parent [-]

> I think too many of us are used to movies and TV (and Star-Trek-like scifi) that gives the incorrect view that extremely detailed information about the state of things is available.

What a strange comment. I never made any such statement or claim that a science-fantasy level of technology would exist in a decades old aircraft or any aircraft.

I was responding to someone who made the absurd claim that the pilots wouldn't be informed of a fire on the wing, when in fact they would be informed of that (which you seem to agree with). So what's Star Trek got to do with anything?

appreciatorBus a day ago | parent | prev | next [-]

I’m sure they knew there was an issue, but I don’t think the sensors can differentiate between “your engine is on fire, but if you can shut it down quickly, everything will be cool.” and “half your entire wing is on fire and your engine is pouring flame out the front/top instead of the back”

positron26 a day ago | parent | prev [-]

This puts an impractical amount of faith in the sensor wiring when the whole pylon and cowling are shredded.

krisoft a day ago | parent | next [-]

It is a very practical amount of fait.

There are two fire detection loops for each engine.[1] Even if both fails (because they get shredded as you say it) the system will report an engine fire if the two loops fail within 5s of each other. (Or FIRE DET (1,2,3,or APU) FAIL, if they got shredded with more than 5s in between without any fire indications in between.)

The detection logic is implemented directly below the cockpit. So that unlikely to have shredded at the same time. But even if the detection logic would have died that would also result in a fire alarm. (as we learned from the March 31, 2002 Charlotte incident.)[2]

In other words it is a very reliable system.

1: page 393 https://randomflightdatabase.fr/Documents/Manuel%20Aviation/...

2: https://www.fss.aero/accident-reports/dvdfiles/US/2002-03-31...

Jtsummers a day ago | parent | prev [-]

I don't know what the MD-11 would have had, again I didn't work on it. But the systems used for other aircraft would have reported an alarm based on what I saw in the video, at least they were designed to do that. The LRU receiving the sensor inputs wouldn't typically be in the wing and would be able to continue reporting the alarm condition even if the sensors fail. In fact, the lack of current from the sensor (for the systems I worked on) would have been enough to trigger the alarm if the sensor were completely eliminated.

positron26 a day ago | parent [-]

No reading is not quite the same as "hot", but I'm sure it did contribute to discerning simple compressor stall to whatever this was.

avalys a day ago | parent | prev | next [-]

Every multi-engine airliner is designed to be able to take off safely even if an engine fails at a critical moment. What might have happened in this case is that the mechanism of failure of one engine caused damaged or interfered with the operation of another engine (via smoke, debris, etc.), and taking off with two engines degraded is not part of the design criteria.

pixl97 20 hours ago | parent | next [-]

I do think 'engine fails' and 'engine has left the building' are two different categories of problems. Even if the rear engine was working I'm going to assume this craft would have crashed, probably just farther down range.

HPsquared a day ago | parent | prev [-]

Some engine failures can't be contained within the cowling, like turbine disc rupture. Probably something like this happened where fragments punctured the surrounding wing structure and/or fuel tanks.

andy99 a day ago | parent | prev [-]

I specifically remember watching a flight test doing an aggressive takeoff and having the voiceover say that aircraft (two engine) need to have enough power to take off full with one engine. And so can take off very steeply empty with two engines. Would that not also be the case for these planes?

justsid a day ago | parent | next [-]

Yes, planes are designed to be able to take off with a lost engine. Usually this will extend the roll a bit because the speeds are different for engine out operations. This isn't the first MD-11 with an engine out take off, 5 years ago a FedEx MD-11 took off with a failure in the left engine[1]. Slightly different case, obviously, but it's certainly something that is accounted for when designing planes.

[1] https://www.avherald.com/h?article=4dfd50b9&opt=0%20

rob74 a day ago | parent | next [-]

Yes, the takeoff roll will be longer, the climb will be much more shallow, but it is possible to take off with one out of two engines (and obviously also with two out of three). Of course, after successful takeoff, the plane should turn around and land as soon as possible.

In this case however, with the wing already on fire (the engine is below the wing, so flames coming out of it would be visible behind and under the wing, not in front), I'm afraid that even if they had managed to take off, the fuel tank would have exploded or burned through the wing before they would have had a chance to land. Actually, this looks similar to the 2000 Concorde crash...

bobthepanda a day ago | parent | prev [-]

That being said, depending on how you lose the engine it can really mess up the takeoff; AA191 was lost when an engine detached from the plane on takeoff and took out part of the wing and hydraulic system with it. https://en.wikipedia.org/wiki/American_Airlines_Flight_191

anonymars a day ago | parent [-]

> when an engine detached from the plane on takeoff...

https://imgur.com/a/NYlrLYO

https://cdn.discordapp.com/attachments/757091156717862935/14...

Source: https://reddit.com/r/flying/comments/1ooms7t/ksdf_accident/n...

appreciatorBus a day ago | parent | prev [-]

All planes are definitely capable of taking off safely even if they lose an engine at the worst time. Whatever happened here, I would be shocked if lack of thrust in the 2 remaining engines was a significant factor unless someone really screwed up the load calculations and they were overweight for conditions.

lazide a day ago | parent | next [-]

Single engine planes (GA, and some military planes) don’t handle this condition well at all.

In fact, for awhile (maybe still the case), the #1 killer of skydivers was single engine failure on takeoff from the jump plane (and similar aircraft failures), not accidents ‘while skydiving’.

dboreham a day ago | parent | prev [-]

Lack of thrust in the "taken out by debris" sense seems to be the case here.

imglorp 21 hours ago | parent | prev | next [-]

An accident on takeoff means full tanks - some 38000 gallons(?) spread along the site like a napalm strike.

wlesieutre 20 hours ago | parent [-]

A particularly large amount of fuel because it was flying to Honolulu

WorldMaker 18 hours ago | parent [-]

A particularly large amount of fuel also because it was loaded with heavy cargo intended to make it all the way to Honolulu.

alchemism 20 hours ago | parent | prev | next [-]

The ground damage in the recent North Philadelphia Airport crash was only due to a chartered jet, but it practically wiped out a residential city block.

roygbiv2 a day ago | parent | prev | next [-]

Looks like a compressor stall on number two engine two seconds into the video.

appreciatorBus a day ago | parent | next [-]

I don’t know, that looks like a lot more than just a stall. There was a ton of flame that looked like it was coming out of the front or top of the engine, rather than just something shooting out the back.

loeg a day ago | parent [-]

I think you're looking at the left wing (number 1) engine; GP is talking about either the tail or right wing engine. (I think tail is number 2 on MD-11.) There's a brief explosion visible through the smoke at about 1-2 seconds in, to the right of the engine visibly on fire; that's probably what he's talking about.

Freeze frame: https://imgur.com/a/c3h8Qd3

FabHK a day ago | parent | next [-]

And having 2 out of 3 engines fail (or underperform) would explain the insufficient climb thrust.

loeg a day ago | parent [-]

Right!

appreciatorBus a day ago | parent | prev | next [-]

Yup makes sense. Now seeing photos of the entire left engine on the ground by the runway and the implication that however it failed it might have damaged the tail engine.

positron26 21 hours ago | parent | prev [-]

Agree, looks like an engine disruption.

The rotation already exacerbates the flow into that engine. Change in flow geometry gets more smoke in its way when it's already eating turbulent air.

We don't know if it just had a disruption or a full-blown stall, but give the way it made it to takeoff speed and then just gave out, stall seems likely.

CPLX a day ago | parent | prev [-]

I would say it does not, in fact, look like a compressor stall. It looks very much like an uncontained disassembly, presumably from fan blades that suffered a catastrophic failure and broke up in a way that exceeded the limits of the engine's containment.

Obviously impossible to tell from some cell phone type videos. Being struck by something is also possible. But it sure does look like an uncontained engine failure.

loeg a day ago | parent [-]

I think you're looking at engine number 1, while GP is talking about engine 2.

https://news.ycombinator.com/item?id=45818448

13 hours ago | parent | prev | next [-]
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a day ago | parent | prev [-]
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anonymars a day ago | parent | prev | next [-]

The second video here shows an incredibly close view of the impact from a nearby dashcam.

https://www.wdrb.com/news/ups-plane-catches-fire-and-explode...

> There is an incredible amount of ground damage!

It's fortunate it wasn't taking off the other direction, towards the adjacent downtown of Louisville (https://www.google.com/maps/place/Louisville+International+A...)

The_President a day ago | parent | next [-]

News site - video obfuscated.

anonymars 19 hours ago | parent [-]

I would say it's easy to see the list of videos with no undue nonsense, the list is augmented as new footage is available, it contains more context on the accident (also augmented with subsequent information), and the local news deserves the traffic more than twitter

The_President 15 hours ago | parent [-]

Linking to raw video directly is a more efficient use of time.

14 hours ago | parent [-]
[deleted]
caminanteblanco 11 hours ago | parent | prev | next [-]

For anyone uninterested in the associated newscast, the footage begins at 5:24

8 hours ago | parent [-]
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rodface a day ago | parent | prev [-]

That is an incredible video.

toomuchtodo a day ago | parent | prev | next [-]

UPS2976

https://www.flightaware.com/live/flight/UPS2976

tonmoy 19 hours ago | parent | prev | next [-]

From what I read they engine caught fire right after they hit V1, so basically the only option was to take off and solve the problem in the air

guerrilla 19 hours ago | parent | prev [-]

Oh wow...