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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

#421
post #412

Earlier quoted context omitted.

If I were an airline's insurer, I wouldn't want to gamble on the good luck lasting.

Not luck. Design. These failures are anticipated. That they can be handled so well is testimony to the energy and regulation put into engine safety over decades. Whereas once such failures could down an airline, killing all on board, they can now be handled safely.

How do you safely handle the debris falling to the ground?

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

#422
So, large, popular, commercial airplanes, are passing their mandatory and thorough pre-flight safe-to-fly inspections, but then having catastrophic failures within minutes of take off.

It must mean that pre-flight inspections (to quote George Carlin) an illusion of safety? ie Not fit for purpose.

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

#423

Earlier quoted context omitted.

Not luck. Design. These failures are anticipated. That they can be handled so well is testimony to the energy and regulation put into engine safety over decades. Whereas once such failures could down an airline, killing all on board, they can now be handled safely.

How do you safely handle the debris falling to the ground?

You dont. A few pounds of engine parts is infinitely better than the previous option, many tons of airliner falling on a house.

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

#424
post #389

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.

2020: (JAL 777 same engine) https://www.youtube.com/watch?v=O-_IAKCBTxc&t=10s 2018: United 777 same PW engine (seems very similar but without fire) https://www.youtube.com/watch?v=O-_IAKCBTxc&t=10s 2016: KAL 777 same PW engines (aborted takeoff after engine failure) https://www.youtube.com/watch?v=9bHrW_34kAk All planes had zero casualties.

You posted the same link twice.

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

#425

Earlier quoted context omitted.

Not luck. Design. These failures are anticipated. That they can be handled so well is testimony to the energy and regulation put into engine safety over decades. Whereas once such failures could down an airline, killing all on board, they can now be handled safely.

How do you safely handle the debris falling to the ground?

@sandworm How about a third option where neither the plane nor the debris falls?

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

#426

Earlier quoted context omitted.

How do you safely handle the debris falling to the ground?

@sandworm How about a third option where neither the plane nor the debris falls?

I'm sure people PW is working on that, but the failure rates on commercial aircraft parts are already ridiculously low. Bad things will always happen.

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

#427

Earlier quoted context omitted.

How do you safely handle the debris falling to the ground?

@sandworm How about a third option where neither the plane nor the debris falls?

The risk of falling debris actually killing someone pales in comparison to the risks of it perhaps doing more damage onboard the aircraft. A loose part near/inside an engine is no longer doing its job and could cause more damage where it is. And the ground is a big place. Drop a random pin in google maps. Then zoom in to see if it is actually on someone's head. This is lottery odds territory.

Objects drop from aircraft all the time, daily. It isn't generally newsworthy unless part of a larger story. And even then, only if the object is found and recognized as being from an aircraft. Small rocks also fall daily from space, probably more by weight than aircraft-related objects, yet virtually nobody ever gets hit by space rocks.

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

#428
post #389

Earlier quoted context omitted.

2020: (JAL 777 same engine) https://www.youtube.com/watch?v=O-_IAKCBTxc&t=10s 2018: United 777 same PW engine (seems very similar but without fire) https://www.youtube.com/watch?v=O-_IAKCBTxc&t=10s 2016: KAL 777 same PW engines (aborted takeoff after engine failure) https://www.youtube.com/watch?v=9bHrW_34kAk All planes had zero casualties.

You posted the same link twice.

I guess the 2020 JAL one could be https://www.youtube.com/watch?v=k2ZJjYQj2bY

There's some good video off the current one on the BBC site https://www.bbc.com/news/world-us-canada-56141673

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

#429
post #361

Earlier quoted context omitted.

737 MAX has entered the chat

How do you fix a broken hardware sensor in Software? Wasn’t that the initial problem?

You write the software to detect and be resilient in the face of hardware failure.

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

#430

Earlier quoted context omitted.

@sandworm How about a third option where neither the plane nor the debris falls?

The risk of falling debris actually killing someone pales in comparison to the risks of it perhaps doing more damage onboard the aircraft. A loose part near/inside an engine is no longer doing its job and could cause more damage where it is. And the ground is a big place. Drop a random pin in google maps. Then zoom in to see if it is actually on someone's head. This is lottery odds territory. Objects drop from aircra…

To add to that, 100 tons of spacerocks hit eath every day. I dont think 100 tons of parts fall of airliners daily.

That being said, there was a russian spacecraft that disintegrated and hit someone house, in the middle of siberia bo less. So it does happen, but its freak ecen3ts territory.

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