Northwest727
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What Happens To Old Engines?

Mon Jan 24, 2011 3:00 pm

So, we all know what happens to old airplanes when they reach their end of life...beer cans (or so the joke goes).

What about the engines mounted on them? I know that an engine will often outlast the airframe, I even recall reading an Airliners magazine of the scrapping process of an airliner. In this case, it was an ex-Canadian 732 in which the JT8Ds were built in the late 1960s while the airframe was built in the mid 1970s. After the airframe was scrapped, the engines were simply inspected, loaded up onto pallets, shrink-wrapped, bar-coded, and sent off to a 732 operator in Africa.

So what happens to engines that reach the end of their design life, or are simply uneconomical to run (such as JT3Ds, RR Conways, etc.)? To further make it complicated, I recall reading that either the GEnx or the PW1000G, was designed to be "highly recycle-able;" does this mean that older engines are simply dumped for trash?
 
KELPkid
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RE: What Happens To Old Engines?

Mon Jan 24, 2011 3:47 pm

I would imagine that an old jet has a very high scrap value due to the exotic alloys involved, especially the disks after the combustion section of the engine.

Some old engines go to A&P schools for the students to continually crack them open and rebuild them and run on test stands. A few lucky ones get cut opened and gain plexiglass windows for exhibition in aviation museums  
Celebrating the birth of KELPkidJR on August 5, 2009 :-)
 
oly720man
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RE: What Happens To Old Engines?

Mon Jan 24, 2011 4:01 pm

Any metal will be recycled, where possible, I'd expect.

http://aircraftdemolition.com/project-reports

Or turned into art/furniture

http://weburbanist.com/2008/10/29/cr...nverted-airplanes-and-plane-parts/

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tb727
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RE: What Happens To Old Engines?

Mon Jan 24, 2011 4:39 pm

I remember hearing some JT8D's end up becoming generators at refineries and such in remote locations.
Too lazy to work, too scared to steal!
 
tdscanuck
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RE: What Happens To Old Engines?

Tue Jan 25, 2011 5:04 am

Quoting tb727 (Reply 3):
I remember hearing some JT8D's end up becoming generators at refineries and such in remote locations.

Enter S&S Turbine Services: http://www.ssturbine.com/productlines.htm

They've even got an Olympus!

Tom.
 
737tdi
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RE: What Happens To Old Engines?

Tue Jan 25, 2011 6:53 am

That J79 set would be awesome!!!!
 
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tb727
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RE: What Happens To Old Engines?

Tue Jan 25, 2011 2:27 pm

Quoting tdscanuck (Reply 4):

Enter S&S Turbine Services: http://www.ssturbine.com/productlines.htm

They've even got an Olympus!

Yeah the J-85(CJ-610) is maybe what I heard of going there.
Too lazy to work, too scared to steal!
 
Viscount724
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RE: What Happens To Old Engines?

Wed Jan 26, 2011 12:25 am

Quoting Northwest727 (Thread starter):
So what happens to engines that reach the end of their design life, or are simply uneconomical to run (such as JT3Ds, RR Conways, etc.)?

The USAF acquired dozens of retired 707s many years ago mainly for their JT3D engines which were recycled in the first KC-135E re-engining program, replacing the original J57s. The last of those aircraft was retired a year or two ago.
 
dkswim
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RE: What Happens To Old Engines?

Wed Jan 26, 2011 4:44 am

recycling. and use modules as spar parts for attrition.
 
greasespot
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RE: What Happens To Old Engines?

Wed Jan 26, 2011 7:24 pm

The Jet Engines may have A DOM from the late 60's but there is pretty much no parts on it that is that old.

When I worked at the airline we scrapped a few JT8's and the local scrapper took two. He never took anymore. I guess some of the metals are quite exotic and he was not able to use them for recycling.

When I left they had a fair number of JT8s sitting in a storage shed that had a big torch cut down the sides.

GS
Sometimes all you can do is look them in the eye and ask " how much did your mom drink when she was pregnant with you?"
 
bhill
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RE: What Happens To Old Engines?

Fri Jan 28, 2011 8:24 pm

Monster Garage!!!!! Hydroplanes!!! and last but not least................Tractor Pullin' !!!!
Carpe Pices
 
MarkC
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RE: What Happens To Old Engines?

Mon Jan 31, 2011 3:18 am

I can understand why a scrap dealer would not be too interested in a complete engine. These are very difficult to take apart without special tools and fixtures, and the only people who have those are in the business of overhauling the engines. Even if a scrap dealer could take it apart, all the parts would be deemed scrap because he would not be FAA approved to work on the engine, and he could not resell any parts which are actually good. The dealer also would not have access to data showing what the parts are made from, and would not know which mills would be interested in parts. And they definitely would be interested in certain parts.

What is typicall done is to pay an overhaul shop maybe $50,000 to cannibalize an engine. You would know how much life (and therefore value) was left on all the life limited parts. You would have to guess as to the condition of any other parts, but you can be reasonably accurate if you are familiar with the old operator. They would charge you extra money for any parts made serviceable, and give you the parts deemed scrap for you to sell as scrap. You would have a fairly accurate understanding of what you would recover in terms of money. Some parts have all different fasteners and other items attached, and are uneconomical to even scrap. The engine status would change on the engine manufacturers record system as cannialized.
 
Northwest727
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RE: What Happens To Old Engines?

Sun Feb 13, 2011 3:08 am

Thanks for the responses so far...but I am still questioning though. For example, what happened to all of the JT3Cs and J57s off of old 707s, 720s, and KC-135s go when the JT3D and TF33 became available, and the frames were re-engined. Where they scrapped?
 
SAAFNAV
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RE: What Happens To Old Engines?

Sun Feb 13, 2011 9:07 am

Quoting oly720man (Reply 2):

Wow, I'd love some furniture like that!!!
On-board Direction Consultant
 
SAAFNAV
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RE: What Happens To Old Engines?

Sun Feb 13, 2011 9:19 am

I've heard that older engines, that the military used to donate to technical school and museums were taken back, due to the use of radio-active materials that were used in the construction.

We have Mirage F1 engine on display in one of our museums, that is cordoned off at 3m, due to that, so I can imagine those would be harder to recycle.

Regards,

Erich
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cobra27
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RE: What Happens To Old Engines?

Sun Feb 13, 2011 2:34 pm

What about aeroderivative jet turbines for electricity and other industrial apllications. There are thousands turbines based of CF6 engine core? Is it possible to use lets some tuubine compressor or blades from older engines and put them on other engines?

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