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United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

avherald.com

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Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#191

Post by anonAndOn »

mannykannot wrote: post #133
haunter wrote: post #37

Recording of the ATC https://twitter.com/ryancaustin1/status/1363236118657957895?... Video of the flying debris https://twitter.com/jacdecnew/status/1363241028690599938?s=2...

WRT the debris video: personally, I would be paying more attention to looking for anything falling in my direction. The debris may flutter like falling paper, but they are much more substantial.

Those are heavy objects falling onto a kids soccer field and nobody yells "HEADS UP!", "FORE!" or "RUN FOR COVER!". How considerate.

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#192

Post by NovemberWhiskey »

JCM9 wrote: post #9
m00dy wrote: post #3

How's that possible it managed to fly with only one engine ?

It’s designed to fly with only one engine. Not with great performance, but it will stay in the air. Routine procedure for twin engine aircraft.

... and to fly that way for quite some time with high confidence of success.

If you think about it: this aircraft was flying to Hawaii; after crossing the west coast, it would be flying almost 2,500 miles over the ocean to get there.

If you lost the engine halfway there (instead of soon after takeoff), you'd either have to turn around and fly back toward California or continue onwards; which is almost a three hour flight.

The concept is called ETOPS for Extended Twin Operations; and the Boeing 777 was the first twin-engine aircraft rated to do this (fly up to three hours for the nearest available airport).

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#193

Post by chrisseaton »

mannykannot wrote: post #183
chrisseaton wrote: post #166

Earlier quoted context omitted.

Yes they use two of the most powerful engines... and just one of those is more than enough to fly the plane just fine almost as fast as they are allowed to... so why else would they have two of them if not redundancy? Fundamentally people can look it up themselves - 'ETOPS' - the redundancy requirement is a written regulation.

I think it should be obvious that I am responding to the claim "they could go faster with a single larger engine." no-one is arguing against redundancy (in which matter, ETOPS is just one aspect.)

If they needed to go faster, they could do that with a single larger engine if they wanted to (which they may have to develop.) But they don't, because they're limited as you've explained.

> no-one is arguing against redundancy

Sn0wCoder said they reason they had two engines was to go faster and not redundancy, and m00dy thinks they can't fly without two engines.

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#194

Post by vmception »

larkinrichards wrote: post #11

I really appreciate focused news sites like avherald. Just the facts, a collection of photos and videos, straightforward. The video of the landing & the passengers cheering—- that huge sigh of relief. Brings a smile to my face.

Any links to the passenger livestreams?

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#195

Post by foepys »

ddalex wrote: post #139
GekkePrutser wrote: post #135

That's crazy, in the Netherlands today there was another flight that dropped engine parts (much smaller though, they're said to have been turbine blades) that hit cars and people. It was also an airliner (747-400). Considering how rare an occurrence is, it's really weird to have both happen on the exact same day. https://www.airlive.net/breaking-turbine-blades-of-a-boeing-... By the way I'm surprised that fire keeps…

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

I read on the German news about the Dutch incident and came to HN because I knew that somebody would've posted about it here. Found this thread and didn't fully read the headline, just "Boeing" and "engine failure". It took me a few seconds to realize that this was a completely different incident.

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#196

Post by ajarmst »

codingdave wrote: post #169
valuearb wrote: post #143

Earlier quoted context omitted.

The 777 has been flying for 25 years with almost no fatal accidents. Unless your flight will be flying over Russian anti-aircraft missile batteries or through a wormhole above Malaysia, you should be perfectly safe.

Another way of looking at it is that after flying and accumulating 25 years of wear and tear without major incident, we now have seen a repeatable flaw that these aircraft may encounter due to their age.

As well as two demonstrations that the aircraft meets the design specification that even a catastrophic failure in the worst stage of flight is easily recoverable. I'd expect an increased inspection rate, possibly some new mandated ND testing for fractures and discontinuities (the last one was an LP shaft failure, IIRC).

One thing that does bug me, though is that we now have two events where the shroud was lost. Were these uncontained failures (problematic because of potential for wing damage) or contained faiLures followed by aerodynamic shedding of the damaged shroud (system functioning as designed). I'm also somewhat concerned about the fire remaining in the burner stage. Might have just been lubricants, but I'd want to make sure the fire handle had been pulled and investigate whether it worked correctly.

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#197

Post by mensetmanusman »

secfirstmd wrote: post #54
IgorPartola wrote: post #25

Earlier quoted context omitted.

What, you don’t like the anchor people on TV asking each other how they feel about every piece of news and making horrible puns at every opportunity? Or having expected announcements be reported as BREAKING NEWS?

As a European who tuned in to US News for the US election I thought that was crazy. I'd watch a few of the right media orgs to see what they were saying and then stay on CNN/MSNBC etc for most of it. It's mad how so much of it every hour was essentially people just regurgitating stuff to fill the time. I mean OK what's happening is important but if you can't fill the airtime why not shift to other news (as in everyth…

If you’re smart you aren’t watching anything, especially since we know now that the more you watch the less in tune with reality you are.

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#198

Post by rectang »

pedrocr wrote: post #21
JCM9 wrote: post #7

The press will make a big deal out of this because of the spectacle of parts falling on people’s lawns... but other than that this looks like a fairly routine engine out situation. Nice job by the crew.

Uncontained engine failures are a big deal. Exactly because they're a risk to the plane, as debris can cause other failures, and a risk to people on the ground. Engines are specifically tested to see if they can contain these failures. This doesn't seem routine at all.

Uncontained engine failure caused the 1989 Sioux City crash of United 232, when debris took out all three hydraulic lines.

https://en.wikipedia.org/wiki/United_Airlines_Flight_232#Tak...

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#199

Post by ashtonkem »

codingdave wrote: post #169
valuearb wrote: post #143

Earlier quoted context omitted.

The 777 has been flying for 25 years with almost no fatal accidents. Unless your flight will be flying over Russian anti-aircraft missile batteries or through a wormhole above Malaysia, you should be perfectly safe.

Another way of looking at it is that after flying and accumulating 25 years of wear and tear without major incident, we now have seen a repeatable flaw that these aircraft may encounter due to their age.

Engine age isn’t the same as airframe age, and components don’t age linearly with calendar time; they age with flight hours or pressurization cycles. Without access to a log book, it’s impossible to know how old an engine is or when it was last overhauled.

Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine

#200

Post by joshuahughes »

bobthepanda wrote: post #137
secfirstmd wrote: post #119

Earlier quoted context omitted.

Yep agree absolutely. I probably read 5-10 different global media a day normally online. I rarely watch TV news but it was sort of an experiment I guess. Wow some of the stuff on places like Newsmax made Fox look like The Guardian.

Newsmax and OAN are notorious for extremely slanted coverage. The Guardian has a slant, but nearly every news outlet will have some slant, either by coverage or through omission. But it's certainly a lot worse at Newsmax and OAN. EDIT: accidentally said "doesn't have"

The Guardian doesn't have a slant? You might want to reconsider that...

“the Guardian is seen as Britain’s most left-wing newspaper”

https://yougov.co.uk/topics/politics/articles-reports/2017/0...

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