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tfisher(at)commandergroup
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 Posted: Tue Mar 14, 2006 9:09 pm Post subject: AGING AIRCRAFT |
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I need to shine mine up.
TF
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bowing74(at)earthlink.net
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| Posted: Wed Mar 15, 2006 6:59 pm Post subject: AGING AIRCRAFT |
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Well there is always hope, since Ted Smith also worked for Donald Douglas,
that it could turn out to be like the DC-8. It turned out to be the only
aircraft in the Aging Fleet Program that was found to have "No discernable
life span".
There is always hope.
bilbo
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cschuerm(at)cox.net
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| Posted: Wed Mar 15, 2006 7:13 pm Post subject: AGING AIRCRAFT |
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Bill Bow wrote:
| Quote: | Well there is always hope, since Ted Smith also worked for Donald Douglas,
that it could turn out to be like the DC-8. It turned out to be the only
aircraft in the Aging Fleet Program that was found to have "No discernable
life span".
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I seem to recall being told that there was a fatigue life determination
done on the Commander. I don't recall details of the results, but I do
remember that no "issues" were found with the wing design.
My personal speculation is that the tail surfaces would be one of the
first places to show significant fatigue damage. Commanders have a
pretty obvious propensity to develope cracks in the tail feathers. I
imagine it is mostly due to prop beat since it seems to be far more
prevelant on the big-engined models such as the 680F/FL.
Maybe Jim or Barry knows more.
Chris
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n395v
Joined: 10 Jan 2006
Posts: 450
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| Posted: Thu Mar 16, 2006 4:50 am Post subject: Re: AGING AIRCRAFT |
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| Quote: | seems to be far more
prevelant on the big-engined models |
There is an SB for massive reinforcement of the aft fuselage of the 685s starting at the aft pressure bulkhead out to the tail cone. Required on all 135 and 121 aircraft. Cost around $25,000 to do it about 5 years ago.
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Milt |
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bowing74(at)earthlink.net
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| Posted: Thu Mar 16, 2006 5:36 am Post subject: AGING AIRCRAFT |
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I imagine it is mostly due to prop beat since it seems to be far more
prevelant on the big-engined models such as the 680F/FL.
I'm safe.
bilbo
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BillLeff1(at)aol.com
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| Posted: Mon Mar 20, 2006 9:03 pm Post subject: AGING AIRCRAFT |
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In fact the Beech 18 had many wing failures. So many, in fact, that the US
post Office stopped allowing them to be used for certain charter flights.
Personal acquaintance of mine, Dick Kelly from Akron, Ohio, had a spar break in
flight at night in smooth air. He was able to get it on the ground before the
wing came off. It broke in the wheel well and the engine mount held it
together. This aircraft had been corporate flown and maintained since new. It had
around 5000 hours on it as I remember. (Dick had 23,000 hours in a Twin Beech
when he retired). After that is when they came up with the several crack
detectors and straps.
Fred Gates did a report on the fatigue life of the commander airframe. I use
to have a copy but can not find it.
Bill Leff
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