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Author Topic: AAL1473 - MD82 - KPBI - Aug 07, 2009 - Engine Failure  (Read 8192 times)
joeyb747
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Nothing Like A 747!


« Reply #15 on: August 18, 2009, 09:21:14 PM »

Glad I can help!  grin

Here is some useful info on what is referred to as the D.S.O., or Design Service Objective.

http://www.tatsco.com/DSO.pdf

Most airframes are built with a 20 or 30 year service life in mind. Metal breaks down over time as well as cycles. Think of it like a balloon...how many times can you inflate and deflate it before it pops?

The MD-80 has a D.S.O. of 50,000 flight cycles, 50,000 hours and 20 years.

Here is a table from Boeing with Boeing and Douglas types listed:

http://www.boeing.com/commercial/aeromagazine/aero_07/corrosn_sb_table01.html

Take my personal favorite, the B747 Classic for example:

The B747 Classic Series (-100 and -200) has a minimum Design Service Objective is 20,000 flights/cycles, 60,000 hours and 20 years.

Now there are exceptions to every rule. TWA retired B747-131 (cn 19676/63) N53110 with 105,759 flight hours and 19,163 pressurization cycles!  cool

Enjoy!
« Last Edit: August 18, 2009, 09:48:45 PM by joeyb747 » Logged

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iflyhi
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« Reply #16 on: August 19, 2009, 02:43:47 PM »

joey ,  what does  w.d.u.  actually stand for ?   thanks..
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joeyb747
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Nothing Like A 747!


« Reply #17 on: August 19, 2009, 03:54:57 PM »

joey ,  what does  w.d.u.  actually stand for ?   thanks..

"Withdrawn from use"...just a fancy way of saying "Parked until they meet the cutters torch"... sad

I've also seen it "W.F.U.", or Withdrwan From Use...as evident in the caption of this pic:

http://www.airliners.net/photo/Boeing-727-222-Adv/0924198/L/&sid=b5b1b093f7b35ac90166062111e3ba0a



« Last Edit: August 19, 2009, 04:19:20 PM by joeyb747 » Logged

Aircraft Mechanic
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