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It's business solar shares of Boeing -- -- today the company saying.
That as many as 570.
Older 737 jetliners are at risk first the same kind of cracks were found in Southwest Airlines.
And those types of structural issues be fixed store.
Are the airlines looking at having to replace all these planes if they want to maintain safety.
Bill Nye the Science Guy and former Boeing airplane engineers.
They are fixable but also very expensive -- I think we buried the lead I didn't know used to work for Boeing this is this is your area if anything you're an expert more at this they've yells.
How many other planes you think -- risk.
All I say all the dash 300 says -- -- when -- see that high from 300.
They're probably all address but this is.
As we like to say an engineering susceptible to analysis that is to say you -- out the problem it looks to me look at all the data.
That as a result of of that extra cycles that is to say you go up the cabin is pressurized.
And then that stretches the material and as you come back down it relaxes over and over and you aluminum is different from steel.
And I really mean this you know you'll never see your very very seldom see in aluminum spring.
Steele you can bend it back and forth almost indefinitely once you've designed.
The material -- -- you can bend steel back and forth almost all you want.
What -- aluminum especially in these so called lap joints.
-- have a fatigue -- limit and and fatigue is an engineering expression when the load is reversed.
When you go this way and then that way so.
What happens to the skin of airplanes over all the aluminum and an airplane if you flexes back and forth and then you hilarious a -- fell joke.
Why don't they make the whole airplane out of the black box.
Because it would be -- -- -- before it's ready to make it out of aluminum.
Right and then you have to take into account this this feature of aluminum and this this one sounds like.
It's borderline like -- the it's pretty good.
But when you do one and a half for one and -- third times as many takeoffs and landings you reach its limit.
You start to get the cracks and of course southwest does a lot of short haul flights which means that maybe the planes are.
Going up and down a lot more and susceptible to this stretching but you say this is a fixable problem -- are replaceable you've got to replace the -- issue.
What do you think personally as a former Boeing engineer bill what set the southwest should really do about that should -- -- or should they repair.
-- -- repair and what you do you take it back to the factory in Renton Washington.
The hometown of Jimi Hendrix and have to.
They affect somebody take it apart and really -- take -- apart and look for the cracks they examine which pieces need to be replaced replaced and it's not.
Cheap -- free it doesn't it takes more than getting an oil change.
But it's quite it's routine and so airplanes are often designed reporter called double murders.
That is to say instead of making a piece out of one solid piece of material you make it out of two.
And then Mitt out who won the one that gets -- the more will be the one that cracks first you take that off and replace it got its in its involved and it's tricky.
But engineers this this is what we do.
So this this problem is solvable but I don't know the contract I don't know who owes who money.
For this kind of fatigue are you surprised -- it hasn't happened more often since -- is is susceptible this.
-- because we designed for it we've we take -- into account.
And this is one of these things you I wouldn't be surprised everybody I am not saying this is what happened.
I wouldn't be surprised if there's an extra vibration problem a subtle.
Thing you know I a resident says it's called that makes these two pieces rub on each other just a little more.
Then people anticipated.
And what happens you scrape away.
That little bit on who I'll vote coding is usually a material called -- chrome it.
And then -- you expose the aluminum and that occur roads.
And gets thinner and corrode more gets thinner.
Right where you need the strength and this is called stress corrosion are not saying that's what happened to confuse what I wouldn't be surprised at this again this again.
Is what we do this is what engineers do we can solve this problem as long as we're allowed to throw money yet -- Right well I think right now people are willing to pay a little more for a little more safety bill -- great to see you thank you very much it was fascinating stuff.
-- listen listen to you all day that was really interesting bill I besides Scott and former.
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