Earlier quoted context omitted.
It exists, in the on-board systems of these planes.
737 MAX has entered the chat
How do you fix a broken hardware sensor in Software?
Wasn’t that the initial problem?
United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
361–370 of 483 posts
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#362Earlier quoted context omitted.
And if they loose the remaining one, all goes south: https://www.youtube.com/watch?v=zn1a2lSk_UI&feature=emb_logo
No, planes glide just fine. That plane simply did not have enough altitude, or lift considering the bank angle to recover
Their problem really was a lack of situational awareness / crew resource management.
As they did shut down their perfectly well working engine instead of the broken one. Obviously that’s not improving your situation in any way.
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#363Earlier 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.
> these aircraft may encounter due to their age Unlike some codebases, aircrafts actually have mandated maintenance. Which is why most accidents are due to human error and not massive technical failures.
And often pretty silly and stupid human errors.
(That's a feature, not a bug! The pervasive checklists and general professionalism mean that most 'normal' human errors are recovered from without enough consequences to make it into the news.
So only the really unlucky and incompetent are what we usually hear about.)
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#364That'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…
Random = clusters happen. In fact, mathematicians were hired during the Battle of England to estimate whether the Germans were aiming for specific buildings (“why is there a cluster of bombs around this church???” or around some secret offices) or just spreading randomly. Verdict: They weren’t aiming, it was random chance that bombs made some clusters onto some buildings. This is what random looks like: No even distr…
I've tried to find a non-clustering pseudo-random function.
Anybody knows the name or urls of those?
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#365Earlier quoted context omitted.
The plane landed and didn’t blast enormous holes with ejected compressor blades. That’s a successful failure.
Is that what happenes when The fan blades fly off and hit the airplane?
As ever, more detail and clear explanations on pprune[0].
As one commenter put it, to an ER doctor this is a shallow wound with lots of blood.
[0] https://www.pprune.org/rumours-news/638797-united-b777-uncon...
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#366Earlier quoted context omitted.
The right engine was out and the pilot chose to do a left turn. Is the choice related?
It's good airmanship to turn into your "good" engine.
Why? Surely it's easier to turn the other way? Then again, it's not a dogfight, so maybe less chance of losing control if turning into the working engine?
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#367Earlier quoted context omitted.
Those are heavy objects falling onto a kids soccer field and nobody yells "HEADS UP!", "FORE!" or "RUN FOR COVER!". How considerate.
It looks like they've got plenty of time to move out of the way.
I'd guess looking upwards at some awkward shaped objects falling down, it's not easy to guess where they will come down.
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#368I 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....
Better than that they move the pieces. Finding the pieces in their exact location + weather pattern can give important clues as to the reason why this happened in the first place.
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#369Almost 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.
I thought it was 'confined' if the containment ring did its job? If it had failed (like not supposed to) it would have been a whole lot worse.
That’s my understanding - “confined” meaning nothing flying tangentially away from the engine and hitting the fuselage or wing.
Saying that, resultant vibration causing the inlet and nacelle cowling to separate isn’t supposed to happen either - because of the serious risk to the tail.
Re: United B772 at Denver on Feb 20th 2021, engine inlet separates from engine
#370Earlier quoted context omitted.
That specific plane will go through a lot of rebuilding, checks, thorough investigation, etc. Given a choice, I'd take that plane over another one.
Yeah but not if they rush the rebuilding and complete it in a few days. I suspect that's gonna require too much duct tape and bubble gum.
Assuming there’s no damage to the airframe itself, it could be back in the air pretty quickly. Changing the engine is a fairly routine procedure, which takes about a day: