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brcamp(at)windows.microso
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 Posted: Wed Aug 15, 2007 8:01 am Post subject: Engine Through-Stud Sheer... |
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FAA doesn’t allow field approvals for engines.
One the other hand, an STC should be a piece of cake if one could find a candidate (victim) aircraft to do the flight testing.
BTW, Bob, I wonder if anyone could get Beryl DeShannon’s assistance in providing the engineering data, since they’ve already got it for upgrading Barons and Bananas? That would make the issue largely a paper chase.
Bruce
From: owner-commander-list-server(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of W J R HAMILTON
Sent: Wednesday, August 15, 2007 2:38 AM
To: commander-list(at)matronics.com
Subject: Re: Engine Through-Stud Sheer...
Folks,
Is an STC really necessary, has anybody explored a field upgrade.
I say this, because several upgrades with which I have been involved in Australian (not AC) have been done on our (near) equivalent of a 377 field approval system, with the appropriate CAR 35 (DER) input.
As a simplification, it is assumed that the extra power will be a "bonus", there was no attempt to re-certify any increased performance.
This has avoided the need to re-determine Vmc figures etc., if the upgrade is a twin.
I know it all sound a bit rough and ready, but there is little involved in putting the IO-520 in the 500A, I doubt that the IO-550 is much more of a bother, with a co-operative FAA man.
Needless to say, one would be wise to have some carefully established "informal guidelines", if in fact you just happened to be "inadvertently" taking advantage of the additional HP, and one quit. Fortunately the wonderful engine out handling of Aero Commanders in general make this somewhat less fraught than some other manufacturer's products that started with IO-470, but have acquired IO-520 along the way.
Cheers,
Bill Hamilton
At 03:24 AM 15/08/2007, you wrote:
Good idea about the 550... A guy in the hangar here has a Bonanza with one and he loves it... I guess put out a call for all 12 of the existing 500A owners left to see what interest might be shown 
David Owens
Aerial Viewpoint
N14AV
AC-500A-Colemill
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01234
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yourtcfg(at)aol.com
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| Posted: Wed Aug 15, 2007 8:27 am Post subject: Engine Through-Stud Sheer... |
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There is no way to really know what happened. I don't believe that Continental requires that the thru bolts be changed at O/H (they should be). Event though this is the first cyl to be remove after this O/H, that stud could easily have been torqued a dozen times in it's service life. These engines are known for cyl failures. So, I would strongly suggest that you replace both thru bolts at that station. Good luck jb
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brcamp(at)windows.microso
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| Posted: Wed Aug 15, 2007 8:50 am Post subject: Engine Through-Stud Sheer... |
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This is a turbocharged engine, yes?
Many a twin engine pilot’s hanger story start with the words “I knew I had an engine problem when I saw the cylinder go through the cowling”. Not much comfort, but I suppose it could have been worse.
Bruce
From: owner-commander-list-server(at)matronics.com [mailto:owner-commander-list-server(at)matronics.com] On Behalf Of yourtcfg(at)aol.com
Sent: Wednesday, August 15, 2007 9:27 AM
To: commander-list(at)matronics.com
Subject: Re: Engine Through-Stud Sheer...
There is no way to really know what happened. I don't believe that Continental requires that the thru bolts be changed at O/H (they should be). Event though this is the first cyl to be remove after this O/H, that stud could easily have been torqued a dozen times in it's service life. These engines are known for cyl failures. So, I would strongly suggest that you replace both thru bolts at that station. Good luck jb
--
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rsrandazzo(at)precisionma
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| Posted: Wed Aug 15, 2007 11:11 am Post subject: Engine Through-Stud Sheer... |
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Bruce
That happened to me two years ago... Same story opener...
Robert S. RandazzoPrecision Manuals Development Group
http://www.precisionmanuals.com
On Aug 15, 2007, at 9:48 AM, Bruce Campbell <brcamp(at)windows.microsoft.com (brcamp(at)windows.microsoft.com)> wrote:
[quote]
This is a turbocharged engine, yes?
Many a twin engine pilot’s hanger story start with the words “I knew I had an engine problem when I saw the cylinder go through the cowling”. Not much comfort, but I suppose it could have been worse.
Bruce
From: owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com) [mailto:owner-commander-list-server(at)matronics.com (owner-commander-list-server(at)matronics.com)] On Behalf Of yourtcfg(at)aol.com (yourtcfg(at)aol.com)
Sent: Wednesday, August 15, 2007 9:27 AM
To: commander-list(at)matronics.com
Subject: Re: Engine Through-Stud Sheer...
There is no way to really know what happened. I don't believe that Continental requires that the thru bolts be changed at O/H (they should be). Event though this is the first cyl to be remove after this O/H, that stud could easily have been torqued a dozen times in it's service life. These engines are known for cyl failures. So, I would strongly suggest that you replace both thru bolts at that station. Good luck jb
--
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http://www.matronics.com/Navigator?Commander-List |
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wjrhamilton(at)optusnet.c
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| Posted: Sun Aug 19, 2007 2:02 am Post subject: Engine Through-Stud Sheer... |
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Folks,
Is an STC really necessary, has anybody explored a field upgrade.
I say this, because several upgrades with which I have been involved in Australian (not AC) have been done on our (near) equivalent of a 377 field approval system, with the appropriate CAR 35 (DER) input.
As a simplification, it is assumed that the extra power will be a "bonus", there was no attempt to re-certify any increased performance.
This has avoided the need to re-determine Vmc figures etc., if the upgrade is a twin.
I know it all sound a bit rough and ready, but there is little involved in putting the IO-520 in the 500A, I doubt that the IO-550 is much more of a bother, with a co-operative FAA man.
Needless to say, one would be wise to have some carefully established "informal guidelines", if in fact you just happened to be "inadvertently" taking advantage of the additional HP, and one quit. Fortunately the wonderful engine out handling of Aero Commanders in general make this somewhat less fraught than some other manufacturer's products that started with IO-470, but have acquired IO-520 along the way.
Cheers,
Bill Hamilton
At 03:24 AM 15/08/2007, you wrote:
[quote] Good idea about the 550... A guy in the hangar here has a Bonanza with one and he loves it... I guess put out a call for all 12 of the existing 500A owners left to see what interest might be shown
David Owens
Aerial Viewpoint
N14AV
AC-500A-Colemill
[b]
| | - The Matronics Commander-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?Commander-List |
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