VTTW Board Index
February 28, 2021, 08:30:14 EST *
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Game and TV Information - Next football game: Texas A&M at Tennessee, December 19, 2020, 12:00 Noon ET, ESPN. Go Big Orange!

Message Board Links - Wayne and Hobbes' Auburn Board, Mudlizard's Vitual Swamp
 
   Home   Help Search Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: OT Jeesh, wonder what caused the engine issue on the United/Denver flight?  (Read 177 times)
0 Members and 1 Guest are viewing this topic.
PirateVOL
Heisman
*****
Offline Offline

Posts: 33408


...


View Profile
« on: February 23, 2021, 12:25:04 EST »

Logged





All men dream: but not equally. Those who
Dream by night in the dusty recesses of their minds
Wake in the day to find that it was vanity; but the
Dreamers of the day are dangerous men, for they
May act their dream with open eyes, to make it
Possible. This I did.
T. E. Lawrence,
The Seven Pillars of Wisdom
_________________________________________________________________________________________________
"If you find yourself in a fair fight, you didn't plan your mission properly." - David Hackworth

"Be polite, be professional, but have a plan to kill everybody you meet"
General James "Mad Dog" Mattis
Tnphil
All-American
*****
Offline Offline

Posts: 5048


View Profile
« Reply #1 on: February 23, 2021, 01:18:15 EST »

https://www.dailymail.co.uk/news/article-9282215/United-Airlines-flight-makes-emergency-landing-dropping-debris.html
Logged
Black Diamond Vol
Heisman
*****
Offline Offline

Posts: 30802



View Profile
« Reply #2 on: February 23, 2021, 05:38:03 EST »

FTR, it wasn't me.
Logged

PirateVOL
Heisman
*****
Offline Offline

Posts: 33408


...


View Profile
« Reply #3 on: February 23, 2021, 02:54:11 EST »

There is so much bullshizzle that is flat out WRONG in that article!
The engine did NOT "explode"
In point of fact, per the NTSB, the blade failure that started the incident is still in the engine, imbedded in the ring that was designed to stop it from exiting the engine (should be at Pratt to be analyzed - NTSB chairman indicated it had markings consistent from a fatigue failure)
The blade it struck did depart the engine (the aero effects could have resulted in that occurrence) and has been found and recovered
The damage to the cowls and panels most likely are due to the vibration from the engine minus 1.5 blades in the fan (you can see it in the video)
The fire is probably an oil fire and is outside where the fire bottles discharge (both were discharged - per NTSB)
Logged





All men dream: but not equally. Those who
Dream by night in the dusty recesses of their minds
Wake in the day to find that it was vanity; but the
Dreamers of the day are dangerous men, for they
May act their dream with open eyes, to make it
Possible. This I did.
T. E. Lawrence,
The Seven Pillars of Wisdom
_________________________________________________________________________________________________
"If you find yourself in a fair fight, you didn't plan your mission properly." - David Hackworth

"Be polite, be professional, but have a plan to kill everybody you meet"
General James "Mad Dog" Mattis
PirateVOL
Heisman
*****
Offline Offline

Posts: 33408


...


View Profile
« Reply #4 on: February 23, 2021, 04:00:56 EST »



You can see the blades are hollow core titanium alloy blades (~10% non titanium)
Logged





All men dream: but not equally. Those who
Dream by night in the dusty recesses of their minds
Wake in the day to find that it was vanity; but the
Dreamers of the day are dangerous men, for they
May act their dream with open eyes, to make it
Possible. This I did.
T. E. Lawrence,
The Seven Pillars of Wisdom
_________________________________________________________________________________________________
"If you find yourself in a fair fight, you didn't plan your mission properly." - David Hackworth

"Be polite, be professional, but have a plan to kill everybody you meet"
General James "Mad Dog" Mattis
BanditVol
Heisman
*****
Offline Offline

Posts: 20598


View Profile
« Reply #5 on: February 23, 2021, 04:42:54 EST »

There is so much bullshizzle that is flat out WRONG in that article!
The engine did NOT "explode"
In point of fact, per the NTSB, the blade failure that started the incident is still in the engine, imbedded in the ring that was designed to stop it from exiting the engine (should be at Pratt to be analyzed - NTSB chairman indicated it had markings consistent from a fatigue failure)
The blade it struck did depart the engine (the aero effects could have resulted in that occurrence) and has been found and recovered
The damage to the cowls and panels most likely are due to the vibration from the engine minus 1.5 blades in the fan (you can see it in the video)
The fire is probably an oil fire and is outside where the fire bottles discharge (both were discharged - per NTSB)


What?  A communications major got something wrong about a technical or scientific story?  Say it isn't so!  That never happens!   
Logged
Coupe De VOL
All-SEC
*****
Offline Offline

Posts: 3919



View Profile
« Reply #6 on: February 23, 2021, 05:32:54 EST »

One little grain of sand striking the blade at just the right spot can cause such a failure.  However the resulting damage initially is just a teeny tiny microfracture that can grow and accelerate the so called metal fatigue.  Routine inspections are supposed to look for the tell tale signs of such things.  I had a really good prof for an aerospace materials & structures class BITD and he had been a NTSB type inspector in Europe.  He investigated a few jet engine failures.  Of course the engine tech today is probably a whole lot different than it was in his day.  He told us some great stories, like the possibility of cascade failure that those rings you mention protect against.  One blade fails and it can take out most of the engine blade array.  He also talked of a case, or cases?, where cascade failure occurred and blades had been thrown threw the cabin!  IIRC, there was a case of death involved.  Pretty cool stuff.  It could have all started with one little grain of sand - amazing to think about.  Really amazing when you consider today's safety records.
Logged

PirateVOL
Heisman
*****
Offline Offline

Posts: 33408


...


View Profile
« Reply #7 on: February 23, 2021, 06:24:16 EST »

What?  A communications major got something wrong about a technical or scientific story?  Say it isn't so!  That never happens!   
There was a very similar incident with a Pratt engine on the 777 in 2018
The upshot is that Pratt had developed a thermal imaging system to detect issues in the hollow core surface and through 2 inspections failed to act on an anomaly in the blade
A result of that incident was an AD
The very first question to the NTSB chairman last night was if the engine was in compliance with the AD
Answer:  we don't know yet

Logged





All men dream: but not equally. Those who
Dream by night in the dusty recesses of their minds
Wake in the day to find that it was vanity; but the
Dreamers of the day are dangerous men, for they
May act their dream with open eyes, to make it
Possible. This I did.
T. E. Lawrence,
The Seven Pillars of Wisdom
_________________________________________________________________________________________________
"If you find yourself in a fair fight, you didn't plan your mission properly." - David Hackworth

"Be polite, be professional, but have a plan to kill everybody you meet"
General James "Mad Dog" Mattis
10EC
In The Two Deep
***
Offline Offline

Posts: 350


View Profile
« Reply #8 on: February 24, 2021, 07:05:08 EST »

There was a very similar incident with a Pratt engine on the 777 in 2018
The upshot is that Pratt had developed a thermal imaging system to detect issues in the hollow core surface and through 2 inspections failed to act on an anomaly in the blade
A result of that incident was an AD
The very first question to the NTSB chairman last night was if the engine was in compliance with the AD
Answer:  we don't know yet



Wasnt there an MD88 in Panama City or somewhere near the beach that that happened to on the ground.  I think it killed a woman.
Logged
PirateVOL
Heisman
*****
Offline Offline

Posts: 33408


...


View Profile
« Reply #9 on: February 24, 2021, 07:13:06 EST »

Wasnt there an MD88 in Panama City or somewhere near the beach that that happened to on the ground.  I think it killed a woman.
Pensacola if I recall

Here it is:
https://en.wikipedia.org/wiki/Delta_Air_Lines_Flight_1288
Logged





All men dream: but not equally. Those who
Dream by night in the dusty recesses of their minds
Wake in the day to find that it was vanity; but the
Dreamers of the day are dangerous men, for they
May act their dream with open eyes, to make it
Possible. This I did.
T. E. Lawrence,
The Seven Pillars of Wisdom
_________________________________________________________________________________________________
"If you find yourself in a fair fight, you didn't plan your mission properly." - David Hackworth

"Be polite, be professional, but have a plan to kill everybody you meet"
General James "Mad Dog" Mattis
Tnphil
All-American
*****
Offline Offline

Posts: 5048


View Profile
« Reply #10 on: February 24, 2021, 08:58:50 EST »

Spent many hours as a final checker on the flight deck of a carrier....I never wrote "not that serious" in any maintenance logs....I let the maintenance chief do it.
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!