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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

#161
post #18

Lucky it didn’t happen half way. Could have been several hours on one engine and the other one shaking and on fire.

Luckily flight plans are always required to be within a certain number of minutes of a place to land, and are certified to operate on one engine for that period. https://en.m.wikipedia.org/wiki/ETOPS

ETOPS helps but it assumes that the engine is just shut down. Here you have compromised aerodynamics and potentially the wing, tail or other systems damaged by the parts of engine

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

#162

Earlier quoted context omitted.

Come on, we all know so they can go faster.

They could go faster with a single larger engine. Why do you think they went with two engines instead of a single larger engine? Redundancy.

While redundancy makes it a moot issue, if I am not mistaken, 777s already use some of the most powerful engines available. As for how fast they fly, I believe it is mostly set by the speed of sound.

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

#163

Almost identical incident happened 3 years ago - the same type (B777-200), the same engine (PW4077), the same operator (United Airlines), the same side (right engine), the same failure (unconfined engine failure). https://avherald.com/h?article=4b4e8ca7&opt=0 I would not be surprised if the whole fleet of this type/engine gets grounded for some time.

And I’m supposed to fly on a 777-200 to Denver operated by United in just a few days. Yay!

And you have nothing to worry about. Statistically you really have nothing to worry about given this incident happening today.

Enjoy your flight and enjoy Denver. Get a donut from Voodoo for me.

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

#164

Almost identical incident happened 3 years ago - the same type (B777-200), the same engine (PW4077), the same operator (United Airlines), the same side (right engine), the same failure (unconfined engine failure). https://avherald.com/h?article=4b4e8ca7&opt=0 I would not be surprised if the whole fleet of this type/engine gets grounded for some time.

And I’m supposed to fly on a 777-200 to Denver operated by United in just a few days. Yay!

Well, wouldn't be surprised if the aircraft is literally this one, and you'll now fly on a different one.

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

#165

Earlier quoted context omitted.

By having airports on islands, or by pushing up the number of minutes that the engines/operator are certified for.

Note that ETOPS goes beyond just engine ratings, it also requires the operator meet all sorts of additional requirements (what if you DO have to divert - can you have the passengers retrieved within 24 hours, do you have food and shelter if you have to divert to a non-commercial airport along the flight path, are your technicians doing proper maintenance, etc).

Good point. Edited my comment to add that :)

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

#166

Earlier quoted context omitted.

They could go faster with a single larger engine. Why do you think they went with two engines instead of a single larger engine? Redundancy.

While redundancy makes it a moot issue, if I am not mistaken, 777s already use some of the most powerful engines available. As for how fast they fly, I believe it is mostly set by the speed of sound.

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.

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

#167

Earlier quoted context omitted.

How do you account for oceans?

By staying as close to land as required to ensure safety. until fairly recently, flights to Hawaii were largely served by 3- or 4-engine jets. It's only in the last several decades that ETOPS regulations have shifted enough to allow regular twin-engine service to Honolulu. See the 3rd response... https://www.airliners.net/forum/viewtopic.php?t=119921

The regulations have been shifted but only time will tell if it should be shifted. I guess we'll find out in 20 years.

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

#168
post #117

I like how people are just standing next to pieces of plane and playing soccer in the background, going like just another day with pieces of plane falling out of sky [0] [0] https://avherald.com/img/united_b772_n772ua_denver_210220_3....

Well once they've already fallen there's not much more to it.. It's not like it's a continuous stream of debris coming from somewhere. But it does look dangerous when it would have first fell though.

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

#169

Earlier quoted context omitted.

And I’m supposed to fly on a 777-200 to Denver operated by United in just a few days. Yay!

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.

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

#170
post #90
post #59

Earlier quoted context omitted.

And if they loose the remaining one, all goes south: https://www.youtube.com/watch?v=zn1a2lSk_UI&feature=emb_logo

Not if you have Sully in the cockpit [1]. They can still glide. [1]: https://en.wikipedia.org/wiki/Chesley_Sullenberger

Not very well, though.
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