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re: UPS plane crashes in Louisville?

Posted on 11/20/25 at 11:34 am to
Posted by BluegrassBelle
RIP Hefty Lefty - 1981-2019
Member since Nov 2010
105928 posts
Posted on 11/20/25 at 11:34 am to
quote:

Maybe I'm reading this wrong, but wouldn't this mean the maintenance wasn't overdue?


That's how I read it as well, I know that was a major question coming in.
Posted by forkedintheroad
Member since Feb 2025
1375 posts
Posted on 11/20/25 at 1:29 pm to
quote:

A 24-month/4,800 hour lubrication task of the pylon thrust
links and pylon spherical bearings was last accomplished on October 18, 2025.


I'm thinking this had to have something to do with the failure given the proximity in time.
Posted by dupergreenie
Member since May 2014
8965 posts
Posted on 11/20/25 at 1:32 pm to
quote:

I'm thinking this had to have something to do with the failure given the proximity in time.


There is probably some tight sphincter muscles right now.
Posted by DustyDinkleman
Here
Member since Feb 2012
19133 posts
Posted on 11/20/25 at 1:58 pm to
quote:

the engine separating by itself isn't catastrophic, if it somehow flew up into the #2 engine, it's all over, haven't really dug into this one to see if that's what happened


Pretty sure there’s video of the number 2 engine compressor stalling as pieces of the number 1 engine entered the nacelle. Loss of thrust on two engines out of three plus the detachment could’ve severed some hydraulic lines for flight controls = recipe for disaster.

Some people are wondering how the number 1 engine (left wing) flew over the fuselage and ended on the right ride of the runway.

It’s all due to gyroscopic precession.
This post was edited on 11/20/25 at 2:08 pm
Posted by nuwaydawg
Member since Nov 2007
2112 posts
Posted on 11/20/25 at 2:46 pm to
UA 232 flight that ended in an Iowa cornfield was the basis of the movie "Fearless".

It's a psychological drama about two people that should have been dead.
Posted by Meauxjeaux
102836 posts including my alters
Member since Jun 2005
45588 posts
Posted on 11/20/25 at 8:59 pm to
quote:

Everything was normal until the nose lifted and then all hell broke loose. Nothing the pilots could have done. Awful.


Seeing those photos, it's amazing they were still level and apparently gaining altitude with 1 engine remaining when they hit the wires as they crossed over the street after the runway.

What happens if they clear that stuff and are able to gain altitude and fly with that wing on fire as it was.

While cruel, maybe the fastest ending here was the best ending.

My God.
Posted by Btrtigerfan
Disgruntled employee
Member since Dec 2007
23352 posts
Posted on 11/20/25 at 9:22 pm to
quote:

gyroscopic precession


Would make a cool band name.
Posted by Saintsisit
Member since Jan 2013
5046 posts
Posted on 11/20/25 at 9:29 pm to
quote:

apparently gaining altitude with 1 engine


Was this stated somewhere?

No way that could be true. They only got 30' agl.
Posted by Meauxjeaux
102836 posts including my alters
Member since Jun 2005
45588 posts
Posted on 11/20/25 at 9:45 pm to
quote:

Was this stated somewhere? No way that could be true. They only got 30' agl.


No. But those photos showed they were 4’ agl on the runway when engine 1 detached and as you note, 30’ agl when it hit the wires.

Gaining slowly but still gaining. What if they had made 50’ agl at that point?
This post was edited on 11/20/25 at 9:47 pm
Posted by Saintsisit
Member since Jan 2013
5046 posts
Posted on 11/20/25 at 9:55 pm to
Engine 1 isn't what stopped them from gaining, it was the addition of the compressor stall on Engine #2.
Posted by forkedintheroad
Member since Feb 2025
1375 posts
Posted on 11/20/25 at 10:01 pm to
quote:

Gaining slowly but still gaining. What if they had made 50’ agl at that point?


They still had enough thrust to climb for the few seconds it took for the tail engine to begin stalling and losing thrust.

But the only way to recover the stall would be to pull power. Either way they had no chance of climbing any further than what they were able to get.
Posted by tes fou
Member since Feb 2014
947 posts
Posted on 11/20/25 at 10:26 pm to
quote:

FAA records show maintenance workers repaired a crack on the crashed UPS plane’s left engine pylon in 2019. The NTSB said Friday the bulk of that pylon was still attached to the engine when it detached from the plane during its takeoff roll leading up to the Nov. 4, 2025 deadly crash.


Had a fedex aircraft mechanic in my office a few days ago. Making small talk I mentioned that it sounded like they were going to have some extra workload with their MD11 fleet. He said they were getting guidance that they’d have to remove and inspect all of the wing mounted engines/pylons on their grounded fleet and that they already had one torn apart that he described as “isn’t pretty”.
Posted by Saintsisit
Member since Jan 2013
5046 posts
Posted on 11/20/25 at 10:41 pm to
quote:

No. But those photos showed they were 4’ agl on the runway when engine 1 detached


No the back landing gear here are 5-10' off the ground. The front gear is 25-30' off the ground at that point, not the 4' you stated.


Posted by Reservoir dawg
Member since Oct 2013
15026 posts
Posted on 11/21/25 at 2:15 am to
quote:

What happens if they clear that stuff and are able to gain altitude and fly with that wing on fire as it was.


They never would have been able to turn back and land with a fuel fed wing fire like that. They would have crashed even if they had cleared the obstacles and had positive vertical speed. They were just doomed.
Posted by AUTimbo
Member since Sep 2011
3224 posts
Posted on 11/21/25 at 5:37 am to
quote:

FAA records show maintenance workers repaired a crack on the crashed UPS plane’s left engine pylon in 2019.


If it was a skin crack on the panels covering the pylon frame that’s not unheard of.
Depending on the length of the skin crack and location it’s not abnormal to stop drill the ends of a skin crack to stop/slow it’s progression. We used to locate the ends with UT/EC inspection for repair guys. Depending on the location you would be surprised how far the manufacturers manuals would allow repeated stop-drilling.


Now if we’re talking about internal frame components then that’s a completely different kettle of fish.
Posted by baldona
Florida
Member since Feb 2016
23294 posts
Posted on 11/21/25 at 7:00 am to
I’m just curious, how long does it take to dump fuel with a full load? Obviously you can’t dump that low, over a city, or on fire I’m assuming?

If it had just lost one engine and was on fire, what would they have done?
Posted by Reservoir dawg
Member since Oct 2013
15026 posts
Posted on 11/22/25 at 4:28 pm to
quote:

If it had just lost one engine and was on fire, what would they have done?


An engine fire could have been manageable. The crew could have used engine fire retardant sysyem and possibly extinguished the fire. With the pylon structural failure the fuel line was torn and the fire was out of control burning control surfaces.
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