One of the best parts of everyone carrying a camera in their pocket is you can get high-resolution images of incidents like these as a matter of course.
and yet no good video of a UFO.
United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
251–260 of 483 posts
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#252Qs:
Anyone tracking the quantity of these events as it relates to the pandemic? Has there been an uptick? If so, can it be correlated with maintenance crew availability?
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#253Earlier quoted context omitted.
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…
> 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.
But in that type of failure, you can't control where the pieces go.
https://abc7ny.com/philadelphia-emergency-landing-southwest-...
It resulted in depressurization and partial ejection/death.
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#254Recording of the ATC https://twitter.com/ryancaustin1/status/1363236118657957895?... Video of the flying debris https://twitter.com/jacdecnew/status/1363241028690599938?s=2...
Animated recreation with audio: * https://www.youtube.com/watch?v=G7-zh7Sebr8 * Via: https://forums.liveatc.net/atcaviation-audio-clips/ual-328-u...
If anyone else is wondering what ZIMMR means in this context, it is a specific feature of the Denver airport: https://ja.flightaware.com/resources/airport/DEN/DP/ZIMMR+TW...
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#255Earlier quoted context omitted.
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.
Point taken that some people had mistaken ideas about twin-engine airplanes, but those mistakes are most straightforwardly resolved by the redundancy consideration alone, which dominates other issues.
> 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.)
Plus a significantly different airframe and perhaps engine intakes to deal with the transonic issue that I also mentioned. It is an idea that bubbles up perennially [1], but so far, the economics have ensured that it doesn't go much beyond the concept stage.
This has become rather silly, but it seques into a related issue: It seems to me that fan-blade failure incidents (or at least uncontained fan-blade failure incidents) have increased in frequency in the last few years. If so, maybe this is a sign that we are already pushing a bit too hard on the limits of current technology?
[1] https://www.boeing.com/features/2019/01/spreading-our-wings-...
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#256Earlier quoted context omitted.
Curious, I had always heard it should be repeated 3 times, but here they’re consistently repeating just twice.
You’ll find that there’s a gap between what the books say about ATC comms and how things are actually done. No one is being pedantic in an emergency.
[deleted]
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#257Earlier quoted context omitted.
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.
That isn't completely true. We don't know exactly, but the documented time between overhaul and the life of the airframe place upper bounds on those.
Some cheap airlines might ignore those rules, but none in the US. (Only the poorest, most corrup, countires in the world will ignore those limits)
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#258Earlier quoted context omitted.
Offtopic to OP but regarding Linus Tech Tips: I also stopped watching 90% of all LMG (his company) videos (on all their channels) because of the clickbait forcing me to click onto things that I am not interested in, only to quickly leave the video. I am not going to watch what I don't want to watch whether it has a clickbait thumbnail and title or not, so they just annoy me more with this. I have not voiced my opinio…
Yeah it seems like almost all of their videos are using clickbaity titles now especially on the secondary channels like ShortCiruit. My viewership of their videos has really dropped. I'm sure they have seen results from gaming the recommended videos but I'd be interested to see if it has affected how many average viewers they get from the subscribed people. Man first you had to get AdBlock, and recently it feels nece…
Not the same as what you wanted, but this one can help: https://github.com/pietervanheijningen/clickbait-remover-for...
I do think it would be cool though to expand SponsorBlock into more crowd-sourced things, since there is already a community of people willing to help.
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#259Recording of the ATC https://twitter.com/ryancaustin1/status/1363236118657957895?... Video of the flying debris https://twitter.com/jacdecnew/status/1363241028690599938?s=2...
The right engine was out and the pilot chose to do a left turn. Is the choice related?
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#260Earlier quoted context omitted.
Curious, I had always heard it should be repeated 3 times, but here they’re consistently repeating just twice.
You’ll find that there’s a gap between what the books say about ATC comms and how things are actually done. No one is being pedantic in an emergency.
If anyone is curious about what the books say, US Air Traffic Controllers use phraseology prescribed by FAA General Order 7110.65.
Also known as the 7110 or the point sixty-five, it includes rules that Air Traffic Controllers must follow to ensure safe and effective operations. So if you're a pilot and are wondering why you have a Hold For Release or are told "unable", you might find the reason in this document.
The Wikipedia article [0] links the PDF version as well as the online version.