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wise(at)txc.net.au
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 Posted: Wed Dec 08, 2010 5:03 pm Post subject: Y52 High Oil temp |
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G’Day All,
A friend of mine has a Yak 52. He is now grounded as he is experiencing abnormally high oil temp in a short time.
Could this be caused by the oil cooler valve (By-Pass)?
Are there any known issues with these valves and is there a maintenance schedule applicable to these valves?
Conversely, has any one had any problems with oil temp going up faster than normal and oil temp climbing right up into the red?
And if so could they please explain what the problem was and how it was rectified?
The temp of the day was not that high to justify this and indeed, the aircraft has been flown on days with a higher temp with no adverse effects.
To Barry Hancock, good luck with your future ventures.
We live in a ever changing world and it is sad when guys like you “Shut Shop”
Seems to me that the world is changing , not for the best, and that the good old days as blokes of my era know them, are slowly vanishing over the horizon.
The authorities and aviation regulators are now also a new breed of wet behind the ears that are now creating more and more of an obstacle course for us rather than to help.
I hope that you are not lost to this site and also your involvement with the Yaks and “Chinese Rice Cutters”
Thanks and cheers,
Chris Wise.
Down Under
[quote][b]
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talew(at)bellsouth.net
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| Posted: Wed Dec 08, 2010 7:36 pm Post subject: Y52 High Oil temp |
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I would always check the sender and the gauge before checking the oil cooler .
There is no reason for the cooler to fail suddenly . The cooler fails slowly ,
The gouges can fail faster .
Terry
From: Chris Wise <wise(at)txc.net.au>
To: yak-list(at)matronics.com
Sent: Wed, December 8, 2010 7:54:52 PM
Subject: Y52 High Oil temp
G’Day All,
A friend of mine has a Yak 52. He is now grounded as he is experiencing abnormally high oil temp in a short time.
Could this be caused by the oil cooler valve (By-Pass)?
Are there any known issues with these valves and is there a maintenance schedule applicable to these valves?
Conversely, has any one had any problems with oil temp going up faster than normal and oil temp climbing right up into the red?
And if so could they please explain what the problem was and how it was rectified?
The temp of the day was not that high to justify this and indeed, the aircraft has been flown on days with a higher temp with no adverse effects.
To Barry Hancock, good luck with your future ventures.
We live in a ever changing world and it is sad when guys like you “Shut Shop”
Seems to me that the world is changing , not for the best, and that the good old days as blokes of my era know them, are slowly vanishing over the horizon.
The authorities and aviation regulators are now also a new breed of wet behind the ears that are now creating more and more of an obstacle course for us rather than to help.
I hope that you are not lost to this site and also your involvement with the Yaks and “Chinese Rice Cutters”
Thanks and cheers,
Chris Wise.
Down Under
ww://www.buildersbooks.com/" rel=nofollow target=_blank>www.buildersbooks-=================================== [/b][/quote]
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wise(at)txc.net.au
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| Posted: Wed Dec 08, 2010 8:13 pm Post subject: Y52 High Oil temp |
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G’Day Terry,
Thanks for that and I shall forward on to the owner and LAME.
We shall advise end result.
Cheers, Chris
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of T A LEWIS
Sent: Thursday, 9 December 2010 2:02 PM
To: yak-list(at)matronics.com
Subject: Re: Y52 High Oil temp
I would always check the sender and the gauge before checking the oil cooler .
There is no reason for the cooler to fail suddenly . The cooler fails slowly ,
The gouges can fail faster .
Terry
From: Chris Wise <wise(at)txc.net.au>
To: yak-list(at)matronics.com
Sent: Wed, December 8, 2010 7:54:52 PM
Subject: Y52 High Oil temp
G’Day All,
A friend of mine has a Yak 52. He is now grounded as he is experiencing abnormally high oil temp in a short time.
Could this be caused by the oil cooler valve (By-Pass)?
Are there any known issues with these valves and is there a maintenance schedule applicable to these valves?
Conversely, has any one had any problems with oil temp going up faster than normal and oil temp climbing right up into the red?
And if so could they please explain what the problem was and how it was rectified?
The temp of the day was not that high to justify this and indeed, the aircraft has been flown on days with a higher temp with no adverse effects.
To Barry Hancock, good luck with your future ventures.
We live in a ever changing world and it is sad when guys like you “Shut Shop”
Seems to me that the world is changing , not for the best, and that the good old days as blokes of my era know them, are slowly vanishing over the horizon.
The authorities and aviation regulators are now also a new breed of wet behind the ears that are now creating more and more of an obstacle course for us rather than to help.
I hope that you are not lost to this site and also your involvement with the Yaks and “Chinese Rice Cutters”
Thanks and cheers,
Chris Wise.
Down Under
ww://www.buildersbooks.com/" rel=nofollow target=_blank>www.buildersbooks-===================================
01234567890123456
[quote][b]
| | - The Matronics Yak-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:
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f4ffm2(at)roadrunner.com
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| Posted: Wed Dec 08, 2010 9:43 pm Post subject: Y52 High Oil temp |
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Chris,
An experience I had with a syndicate airplane leaves me a bit pessimistic on your friends situation. Do you know if he had anybody in the back seat and did he ask them what the oil temp was on the gauge back there? That would have been a good check of gauges and temperature probes.
To summarize the syndicate airplane experience: I took off on a relatively cool day and soon noticed that oil temp was in the yellow and climbing...gib confirmed his gauge showed the same. Our other syndicate 52 was flying in the area and I asked him to join up to look at the gills (by feel, they seemed to be opening and closing)...and he confirmed they were full open. So, unquestionably, there was a temperature issue.
We went through the same thought process that your friend has probably gone through...are the gauges accurate?....are the probes accurate? Anything else relevant? Then on to the oil cooler....and bypass valve. We had the oil cooler overhauled and a new bypass valve (and associiated sensor) was installed. I then flew it on another coolish day...Less than 5 minutes was all it took to see the oil temp heading to where we didn't want it to go.
Long story made short....our maintenance guru, Vladimir Yastremsky (experienced Yak and M-14P expert mech from Russia...Kazakhstan, actually)....went through every possibility for us with the engine. Our conclusion...probably someone had flown the airplane on a high oat day just before my cool day flight and discovery of the problem....and had taken off with the gills closed and had flown a lot at high power settings and had simply cooked the engine (we won't go into the issue of that person not telling anyone). Solution? We had to replace the engine. Fortunately, that was in the days when a new engine could be had for under $20M USD and there were 8 members to share the hit.
I hope there's a simpler...and cheaper...solution to your friend's problem.
Roger Baker
PS I would be interested to hear what the eventual diagnosis is.____________________________________________________________________________
On Dec 8, 2010, at 4:54 PM, Chris Wise wrote:
| Quote: | G’Day All,
A friend of mine has a Yak 52. He is now grounded as he is experiencing abnormally high oil temp in a short time.
Could this be caused by the oil cooler valve (By-Pass)?
Are there any known issues with these valves and is there a maintenance schedule applicable to these valves?
Conversely, has any one had any problems with oil temp going up faster than normal and oil temp climbing right up into the red?
And if so could they please explain what the problem was and how it was rectified?
The temp of the day was not that high to justify this and indeed, the aircraft has been flown on days with a higher temp with no adverse effects.
To Barry Hancock, good luck with your future ventures.
We live in a ever changing world and it is sad when guys like you “Shut Shop”
Seems to me that the world is changing , not for the best, and that the good old days as blokes of my era know them, are slowly vanishing over the horizon.
The authorities and aviation regulators are now also a new breed of wet behind the ears that are now creating more and more of an obstacle course for us rather than to help.
I hope that you are not lost to this site and also your involvement with the Yaks and “Chinese Rice Cutters”
Thanks and cheers,
Chris Wise.
Down Under
| Quote: |
style="color: blue; text-decoration: underline; ">www.aeroelectric.com
href="http://www.buildersbooks.com" style="color: blue; text-decoration: underline; ">www.buildersbooks.com
style="color: blue; text-decoration: underline; ">www.homebuilthelp.com
style="color: blue; text-decoration: underline; ">http://www.matronics.com/contribution
style="color: blue; text-decoration: underline; ">http://www.matronics.com/Navigator?Yak-List
blue; text-decoration: underline; ">http://forums.matronics.com
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Roger E. Baker, Managing Director
Panadero Energy Components, LLC
dba PEC AirAssist
760/809-5506
760/730-9244
760/454-4595 fax
f4ffm2(at)roadrunner.com (f4ffm2(at)roadrunner.com)
[quote][b]
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