Today's Message Index:
----------------------
1. 01:10 AM - Xavier MEAL est absent. (Xavier.MEAL@editions-lariviere.fr)
2. 03:55 AM - Re: Emergency Tank leak? (skidmk)
3. 04:34 AM - Re: Emergency Tank leak? (A. Dennis Savarese)
4. 08:48 AM - Re: Re: Emergency Tank leak? (KingCJ6@aol.com)
5. 09:50 AM - Re: Re: Emergency Tank leak? (Walter Lannon)
6. 10:54 AM - Re: Re: Emergency Tank leak? (sajdds@COMCAST.NET)
7. 02:53 PM - Re: Emergency Tank leak? (Rich Langer)
8. 03:06 PM - lower oil tank oil hose (ronwasson)
9. 03:42 PM - Yak-52 Exhaust Danger (Mozam)
10. 04:54 PM - Re: Yak-52 Exhaust Danger (Robert Langford)
11. 05:22 PM - Re: Yak-52 Exhaust Danger (doug sapp)
12. 05:37 PM - Re: Yak-52 Exhaust Danger (Robert Langford)
13. 06:31 PM - Re: Re: Emergency Tank leak? (cjpilot710@aol.com)
14. 06:54 PM - Re: Re: Emergency Tank leak? (Walter Lannon)
15. 07:03 PM - Re: Yak-52 Exhaust Danger (Walter Lannon)
16. 07:19 PM - Re: Yak-52 Exhaust Danger (Mozam)
17. 07:33 PM - Re: Re: Emergency Tank leak? (Walter Lannon)
18. 07:56 PM - Re: Yak-52 Exhaust Danger (Roger Kemp MD)
19. 08:19 PM - Re: Re: Emergency Tank leak? (Roger Kemp MD)
Message 1
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| Subject: | Xavier MEAL est absent. |
Je serai absent(e) du 25/07/2008 au 25/08/2008.
Message 2
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| Subject: | Re: Emergency Tank leak? |
I have not. my understanding was at annual (100hours) Upon checking the list,
I now understand 25 hours is more in order to clean and verify? [Embarassed]
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0058#200058
Message 3
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| Subject: | Re: Emergency Tank leak? |
Mike,
The CJ's system is not quite the same as the Yak 52's. The CJ's
compressor refills both the main and emergency bottles. There are more
components in the CJ6's system than the 52.
Dennis
----- Original Message -----
From: mike holoman
To: yak-list@matronics.com
Sent: Friday, August 22, 2008 9:14 PM
Subject: RE: Yak-List: Emergency Tank leak?
If th CJ is the same piping as the Yak, and if the leak is not at or
in the pressure gauges (front or back) then it is most likely the seal
in the main fill check valve. Regards, Mike
-------------------------------------------------------------------------
-----
From: KingCJ6@aol.com
Date: Fri, 22 Aug 2008 18:19:51 -0400
Subject: Re: Yak-List: Emergency Tank leak?
To: yak-list@matronics.com
If it's not the tank, lines to/from, valve etc., check the gauge.
Our's had a leak where the inlet fitting attached to the back some years
ago.
In a message dated 8/22/2008 3:04:34 P.M. Pacific Daylight Time,
bourgem@cia.com writes:
Hello all,,,
went out to the cj the other day and the emerg tank is at zero. The
main tank has 40atms... but bleeds down fairly rapidly once I open it
and if the engine is not running.
With the engine running, I easily pump up to 60 in the main, and
almost 70 in the emerg tank.
Ideas as to where the emerg tank maybe leaking?
thanks
--------
Mike "Skidmk" Bourget
Ottawa, Ontario
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=199982#199982
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ttp://forums.matronics.com
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Message 4
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| Subject: | Re: Emergency Tank leak? |
Mike - after you disassemble and clean/lube the valve, adjustment is an
easy, 5 minute on-the-ground procedure.
Open the main valve and bleed the pressure to below 40 by cycling the flaps.
Loosen the adjustment lock nut on the end of the valve. Hook up your
external air source and slowly turn on, they adjust the pop-off valve screw so
it
starts "popping" at 43-45, then tighten the lock nut. Check for
functionality on the ground by again bleeding below 40 and refilling with the
external
tank.
Dave
In a message dated 8/22/2008 8:14:20 P.M. Pacific Daylight Time,
skidmk@gmail.com writes:
This check valve was new, from Doug I think,, is it possible it was not
properly adjusted?.... How do you adjust,, build up pressure, land adjust etc...?
**************It's only a deal if it's where you want to go. Find your travel
deal here.
(http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)
Message 5
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| Subject: | Re: Emergency Tank leak? |
The periodicity for water filter replacement is a function of hours flown
AND humidity. In some climates (Florida?) it may be 5 hrs. or less and in
others (Arizona?) maybe 50 Hrs.
It is also totally dependant on draining the snot valve after every engine
operation.
Start with the water filter. That will give an indication of what you may
find downstream.
Walt
----- Original Message -----
From: "skidmk" <skidmk@gmail.com>
Sent: Saturday, August 23, 2008 3:54 AM
Subject: Yak-List: Re: Emergency Tank leak?
>
> I have not. my understanding was at annual (100hours) Upon checking the
> list, I now understand 25 hours is more in order to clean and verify?
> [Embarassed]
>
> --------
> Mike "Skidmk" Bourget
> Ottawa, Ontario
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0058#200058
>
>
>
Message 6
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| Subject: | Re: Emergency Tank leak? |
Given the symilarities between the CJ and the Yak 52 has anyone formed an opinion
on whether the water filter is worth having? Should I add one to my 52? The
52 seems OK without one so maybe they are not needed in the CJ.
--
Steve Johnson
Yak 52
9900X
0B5
413 522-1130 Cell
-------------- Original message --------------
From: Walter Lannon <wlannon@persona.ca>
>
> The periodicity for water filter replacement is a function of hours flown
> AND humidity. In some climates (Florida?) it may be 5 hrs. or less and in
> others (Arizona?) maybe 50 Hrs.
> It is also totally dependant on draining the snot valve after every engine
> operation.
>
> Start with the water filter. That will give an indication of what you may
> find downstream.
>
> Walt
> ----- Original Message -----
> From: "skidmk"
> To:
> Sent: Saturday, August 23, 2008 3:54 AM
> Subject: Yak-List: Re: Emergency Tank leak?
>
>
> >
> > I have not. my understanding was at annual (100hours) Upon checking the
> > list, I now understand 25 hours is more in order to clean and verify?
> > [Embarassed]
> >
> > --------
> > Mike "Skidmk" Bourget
> > Ottawa, Ontario
> >
> >
> >
> >
> > Read this topic online here:
> >
> > http://forums.matronics.com/viewtopic.php?p 0058#200058
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
>
>
>
>
>
>
<html><body>
<DIV>Given the symilarities between the CJ and the Yak 52 has anyone formed
an opinion on whether the water filter is worth having? Should I add one to
my 52? The 52 seems OK without one so maybe they are not needed in the CJ.</DIV>
<DIV> </DIV>
<DIV class=signature id=signature>--<BR>Steve Johnson <BR>Yak 52 <BR>9900X <BR>0B5
<BR>413 522-1130 Cell</DIV>
<DIV> </DIV>
<BLOCKQUOTE style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #1010ff 2px
solid">-------------- Original message -------------- <BR>From: Walter Lannon
<wlannon@persona.ca> <BR><BR>> --> Yak-List message posted by: Walter
Lannon <WLANNON@PERSONA.CA><BR>> <BR>> The periodicity for water filter
replacement is a function of hours flown <BR>> AND humidity. In some
climates (Florida?) it may be 5 hrs. or less and in <BR>> others (Arizona?)
maybe 50 Hrs. <BR>> It is also totally dependant on draining the snot valve
after every engine <BR>> operation. <BR>> <BR>> Start with the water
filter. That will give an indication of what you may <BR>> find downstream.
<BR>> <BR>> Walt <BR>> ----- Original Message ----- <BR>> From:
"skidmk" <SKIDMK@GMAIL.COM><BR>> To: <YAK-LIST@MATRONICS.COM><BR>> Sent:
Saturday, August 23, 2008 3:54 AM <BR>> Subject: Yak-List: Re: Emergency
Tank leak? <BR>> <BR>> <BR>> > --> Yak
-List
> _
<pre><b><font size=2 color="#000000" face="courier new,courier">
</b></font></pre></body></html>
Message 7
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| Subject: | Re: Emergency Tank leak? |
Does the pop off valve set the emergency tank pressure along with main tank pressure
or is there another place to adjust emergency pressure? Also, how do you
check your gages for accuracy? My rear gage is 10 Atms more than the front cockpit
gage and my main gage shows 43 Atm. Thanks .
Rich Langer
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0144#200144
Message 8
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| Subject: | lower oil tank oil hose |
Anyone replace the oil hose between the gearbox and lower oil tank on a cj housia
. I need to know a size available here in the states as Doug has none and can
not get them.
ron
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0145#200145
Message 9
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| Subject: | Yak-52 Exhaust Danger |
I finally got around to taking a picture to show what all -52 drivers need to be
aware of.
The inner pipe of the exhaust section which contains the baffling and shroud for
the cockpit heat split open. You cannot see this split because it is hidden
inside the heat shroud. If you remove this section and inspect the inside of
the inner pipe you may see any splits.
When this pipe fails you are getting CO pumped directly into the cockpit via the
cockpit air vent system. And you have no way of knowing this is happening.
I have no idea how long this pipe had been split and I was getting so much CO.
The split in my pipe grew until I finally realized something was amiss when
the air from the vent between my knees was so hot it was burning my legs. Raw
HOT exhaust was being pumped straight into the cockpit.
In the pictures you can see what this section looks like with the heat shroud cut
off. You can see the small sections of U-channel that hold the shroud away
from the inner pipe. They are spot welded on and many of the spot welds have
failed, leaving more holes in the pipe. You can even see a new hole I found
when I took the picture. You cannot see the BIG patch on the back side of the
pipe.
I STRONGLY recommend that you remove this section of exhaust and inspect the inner
pipe for any leaks.
You can see in the picture the new air supply hose I rigged up...works great, but
no heat now.
Does anyone have just this section of the exhaust available?
Fly Safe,
Steve Dalton
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0150#200150
Attachments:
http://forums.matronics.com//files/exhaust1_581.jpg
Message 10
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| Subject: | Re: Yak-52 Exhaust Danger |
Thanks Steve for this important information, YAK owners, standard and TW's
take note of this information. I have a digital meter that I plug in
occasionally to check for gas. I have not to date found a high level except
while doing run-up. Then only with the canopy partially closed. However
lately on start-up at times I will get oil smoke through the heat duct. As
the TW owners know at times due to oil passing the exhaust valve on the
number one cylinder , oil will run down the exhaust on the right side. This
causes oil to blow out of the exhaust on start-up. After seeing these Pics,
I now believe I have a failure under the shroud such as seen in the Pics.
Due to oil actually entering the heat duct. Guys with winter coming on we
will be operating more with the canopy closed. Check for gas with an
instrument and check the system. You can bet I will be checking ASAP.
Lefty
From: "Mozam" <sdalton@hughes.net>
Sent: Saturday, August 23, 2008 5:42 PM
Subject: Yak-List: Yak-52 Exhaust Danger
>
> I finally got around to taking a picture to show what all -52 drivers need
> to be aware of.
>
> The inner pipe of the exhaust section which contains the baffling and
> shroud for the cockpit heat split open. You cannot see this split because
> it is hidden inside the heat shroud. If you remove this section and
> inspect the inside of the inner pipe you may see any splits.
>
> When this pipe fails you are getting CO pumped directly into the cockpit
> via the cockpit air vent system. And you have no way of knowing this is
> happening. I have no idea how long this pipe had been split and I was
> getting so much CO. The split in my pipe grew until I finally realized
> something was amiss when the air from the vent between my knees was so hot
> it was burning my legs. Raw HOT exhaust was being pumped straight into
> the cockpit.
>
> In the pictures you can see what this section looks like with the heat
> shroud cut off. You can see the small sections of U-channel that hold the
> shroud away from the inner pipe. They are spot welded on and many of the
> spot welds have failed, leaving more holes in the pipe. You can even see
> a new hole I found when I took the picture. You cannot see the BIG patch
> on the back side of the pipe.
>
> I STRONGLY recommend that you remove this section of exhaust and inspect
> the inner pipe for any leaks.
>
> You can see in the picture the new air supply hose I rigged up...works
> great, but no heat now.
>
> Does anyone have just this section of the exhaust available?
>
> Fly Safe,
> Steve Dalton
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0150#200150
>
>
> Attachments:
>
> http://forums.matronics.com//files/exhaust1_581.jpg
>
>
> --
> Checked by AVG.
> 6:32 PM
>
>
Message 11
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| Subject: | Re: Yak-52 Exhaust Danger |
Steve,
I do believe I have this Yak 52 cabin heat section in my stock, give me a
call on Monday.
Also, Not saying that it has not been getting done, and not looking to piss
anyone off, but it is nearly a law written in stone that the shrouds come
off of all cabin heat muffs at every annual, just to prevent what you are
describing.
On Sat, Aug 23, 2008 at 3:42 PM, Mozam <sdalton@hughes.net> wrote:
>
> I finally got around to taking a picture to show what all -52 drivers need
> to be aware of.
>
> The inner pipe of the exhaust section which contains the baffling and
> shroud for the cockpit heat split open. You cannot see this split because
> it is hidden inside the heat shroud. If you remove this section and inspect
> the inside of the inner pipe you may see any splits.
>
> When this pipe fails you are getting CO pumped directly into the cockpit
> via the cockpit air vent system. And you have no way of knowing this is
> happening. I have no idea how long this pipe had been split and I was
> getting so much CO. The split in my pipe grew until I finally realized
> something was amiss when the air from the vent between my knees was so hot
> it was burning my legs. Raw HOT exhaust was being pumped straight into the
> cockpit.
>
> In the pictures you can see what this section looks like with the heat
> shroud cut off. You can see the small sections of U-channel that hold the
> shroud away from the inner pipe. They are spot welded on and many of the
> spot welds have failed, leaving more holes in the pipe. You can even see a
> new hole I found when I took the picture. You cannot see the BIG patch on
> the back side of the pipe.
>
> I STRONGLY recommend that you remove this section of exhaust and inspect
> the inner pipe for any leaks.
>
> You can see in the picture the new air supply hose I rigged up...works
> great, but no heat now.
>
> Does anyone have just this section of the exhaust available?
>
> Fly Safe,
> Steve Dalton
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0150#200150
>
>
> Attachments:
>
> http://forums.matronics.com//files/exhaust1_581.jpg
>
>
--
Always Yakin,
Doug Sapp
Phone 509-826-4610
Fax 509-826-3644
Message 12
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| Subject: | Re: Yak-52 Exhaust Danger |
That is good information and indicates the need for sharing information
such as this. I have some 2,500 Hrs in both the standard and TW YAKs,
and have yet to pull one for inspection. Indicates that this a learning
business.
After some fourteen years of flying these things, I should have known
better, and you can bet I am not pissed off to hear about it. Everyone
should take this information and go with it. Also it would be
interesting to have feed back from all owners that find problems.
Lefty
----- Original Message -----
From: doug sapp
To: yak-list@matronics.com
Sent: Saturday, August 23, 2008 7:21 PM
Subject: Re: Yak-List: Yak-52 Exhaust Danger
Steve,
I do believe I have this Yak 52 cabin heat section in my stock, give
me a call on Monday.
Also, Not saying that it has not been getting done, and not looking
to piss anyone off, but it is nearly a law written in stone that the
shrouds come off of all cabin heat muffs at every annual, just to
prevent what you are describing.
On Sat, Aug 23, 2008 at 3:42 PM, Mozam <sdalton@hughes.net> wrote:
I finally got around to taking a picture to show what all -52
drivers need to be aware of.
The inner pipe of the exhaust section which contains the baffling
and shroud for the cockpit heat split open. You cannot see this split
because it is hidden inside the heat shroud. If you remove this section
and inspect the inside of the inner pipe you may see any splits.
When this pipe fails you are getting CO pumped directly into the
cockpit via the cockpit air vent system. And you have no way of knowing
this is happening. I have no idea how long this pipe had been split and
I was getting so much CO. The split in my pipe grew until I finally
realized something was amiss when the air from the vent between my knees
was so hot it was burning my legs. Raw HOT exhaust was being pumped
straight into the cockpit.
In the pictures you can see what this section looks like with the
heat shroud cut off. You can see the small sections of U-channel that
hold the shroud away from the inner pipe. They are spot welded on and
many of the spot welds have failed, leaving more holes in the pipe. You
can even see a new hole I found when I took the picture. You cannot see
the BIG patch on the back side of the pipe.
I STRONGLY recommend that you remove this section of exhaust and
inspect the inner pipe for any leaks.
You can see in the picture the new air supply hose I rigged
up...works great, but no heat now.
Does anyone have just this section of the exhaust available?
Fly Safe,
Steve Dalton
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0150#200150
-------------------------------------------------------------------------
---
Checked by AVG.
8/22/2008 6:32 PM
Message 13
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| Subject: | Re: Emergency Tank leak? |
On the CJ-6 the pop off valve sets the pressure in both the main tank and
the emergency tank.
Jim "Pappy" Goolsby
--> Yak-List message posted by: "Rich Langer" <rlanger2@comcast.net>
Does the pop off valve set the emergency tank pressure along with main tank
pressure or is there another place to adjust emergency pressure? Also, how
do you check your gages for accuracy? My rear gage is 10 Atms more than the
front cockpit gage and my main gage shows 43 Atm. Thanks .
Rich Langer
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0144#200144
**************It's only a deal if it's where you want to go. Find your travel
deal here.
(http://information.travel.aol.com/deals?ncid=aoltrv00050000000047)
Message 14
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| Subject: | Re: Emergency Tank leak? |
Yes for the CJ. No, I think, for the Yak52.
Typically the Emerg. tank in the CJ will hold about 5 ATM's more than the
main. Both are being equally charged but the Emerg. system is small (i.e.
less components) and usually leak free compared to the main (much larger and
never leak free). At least that is my theory.
That is the reason for the recommendation to adjust the press. to 45 rather
than 50 ATM's.
The pressure guage has a removable VERY small restrictor screwed into the
fitting on the instrument, remove that and check for blockage. Soaking in
lacquer thinner and shop air usually works to open it. Just don't blow the
thing away--- it is VERY SMALL.
That could solve the gauge difference.
To check accuracy you need a known calibrated gauge on an external pressure
source for comparison.
Walt
----- Original Message -----
From: "Rich Langer" <rlanger2@comcast.net>
Sent: Saturday, August 23, 2008 2:52 PM
Subject: Yak-List: Re: Emergency Tank leak?
>
> Does the pop off valve set the emergency tank pressure along with main
> tank pressure or is there another place to adjust emergency pressure?
> Also, how do you check your gages for accuracy? My rear gage is 10 Atms
> more than the front cockpit gage and my main gage shows 43 Atm. Thanks .
> Rich Langer
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p 0144#200144
>
>
>
Message 15
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| Subject: | Re: Yak-52 Exhaust Danger |
In Canada it is an Airworthiness Directive that applies to all aircraft regardless
of certification status.
Walt
----- Original Message -----
From: doug sapp
To: yak-list@matronics.com
Sent: Saturday, August 23, 2008 5:21 PM
Subject: Re: Yak-List: Yak-52 Exhaust Danger
Steve,
I do believe I have this Yak 52 cabin heat section in my stock, give me a call
on Monday.
Also, Not saying that it has not been getting done, and not looking to piss
anyone off, but it is nearly a law written in stone that the shrouds come off
of all cabin heat muffs at every annual, just to prevent what you are describing.
On Sat, Aug 23, 2008 at 3:42 PM, Mozam <sdalton@hughes.net> wrote:
I finally got around to taking a picture to show what all -52 drivers need
to be aware of.
The inner pipe of the exhaust section which contains the baffling and shroud
for the cockpit heat split open. You cannot see this split because it is hidden
inside the heat shroud. If you remove this section and inspect the inside
of the inner pipe you may see any splits.
When this pipe fails you are getting CO pumped directly into the cockpit via
the cockpit air vent system. And you have no way of knowing this is happening.
I have no idea how long this pipe had been split and I was getting so much
CO. The split in my pipe grew until I finally realized something was amiss
when the air from the vent between my knees was so hot it was burning my legs.
Raw HOT exhaust was being pumped straight into the cockpit.
In the pictures you can see what this section looks like with the heat shroud
cut off. You can see the small sections of U-channel that hold the shroud
away from the inner pipe. They are spot welded on and many of the spot welds
have failed, leaving more holes in the pipe. You can even see a new hole I found
when I took the picture. You cannot see the BIG patch on the back side of
the pipe.
I STRONGLY recommend that you remove this section of exhaust and inspect the
inner pipe for any leaks.
You can see in the picture the new air supply hose I rigged up...works great,
but no heat now.
Does anyone have just this section of the exhaust available?
Fly Safe,
Steve Dalton
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0150#200150
Message 16
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| Subject: | Re: Yak-52 Exhaust Danger |
dougsappllc(at)gmail.com wrote:
> Steve,
> I do believe I have this Yak 52 cabin heat section in my stock, give me a call
on Monday.
>
> Also, Not saying that it has not been getting done, and not looking to piss
anyone off, but it is nearly a law written in stone that the shrouds come off
of all cabin heat muffs at every annual, just to prevent what you are describing.
>
>
>
Doug,
I will call you...thanks.
How do you remove this shroud for inspection? It is all welded together and has
to be cut off for inspection.
-Steve
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0201#200201
Message 17
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| Subject: | Re: Emergency Tank leak? |
I am surprised. Would have assumed they all had a water filter. Comments Dennis???
Walt
----- Original Message -----
From: sajdds@comcast.net
To: yak-list@matronics.com
Sent: Saturday, August 23, 2008 10:54 AM
Subject: Re: Yak-List: Re: Emergency Tank leak?
Given the symilarities between the CJ and the Yak 52 has anyone formed an opinion
on whether the water filter is worth having? Should I add one to my 52? The
52 seems OK without one so maybe they are not needed in the CJ.
--
Steve Johnson
Yak 52
9900X
0B5
413 522-1130 Cell
-------------- Original message --------------
From: Walter Lannon <wlannon@persona.ca>
>
> The periodicity for water filter replacement is a function of hours flown
> AND humidity. In some climates (Florida?) it may be 5 hrs. or less and in
> others (Arizona?) maybe 50 Hrs.
> It is also totally dependant on draining the snot valve after every engine
> operation.
>
> Start with the water filter. That will give an indication of what you may
> find downstream.
>
> Walt
> ----- Original Message -----
> From: "skidmk"
> To:
> Sent: Saturday, August 23, 2008 3:54 AM
> Subject: Yak-List: Re: Emergency Tank leak?
>
>
> > --> Yak -List > _
Message 18
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| Subject: | Yak-52 Exhaust Danger |
Mozam,
Thanks for the heads up.
Have you thought about scavenging air off the back of your oil cooler. It
can be done with the 50. The 50 does not have a heat shroud at all yet with
the air that bleeds into the cockpit from the oil cooler with the door
closed or cracked the 50 stays warm even in 20 degree weather. My oil cooler
is farther forward on the nose than yours in the 52 TW. I'm less likely to
get exhaust gas vented into the cockpit from there. It gets in around the
opening at the tail wheel. Yes I have measured the CO concentration at the
tail. It averages 50 to 60 ppm in the aft empennage during taxi and TO.
doc
-----Original Message-----
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Mozam
Sent: Saturday, August 23, 2008 5:42 PM
Subject: Yak-List: Yak-52 Exhaust Danger
I finally got around to taking a picture to show what all -52 drivers need
to be aware of.
The inner pipe of the exhaust section which contains the baffling and shroud
for the cockpit heat split open. You cannot see this split because it is
hidden inside the heat shroud. If you remove this section and inspect the
inside of the inner pipe you may see any splits.
When this pipe fails you are getting CO pumped directly into the cockpit via
the cockpit air vent system. And you have no way of knowing this is
happening. I have no idea how long this pipe had been split and I was
getting so much CO. The split in my pipe grew until I finally realized
something was amiss when the air from the vent between my knees was so hot
it was burning my legs. Raw HOT exhaust was being pumped straight into the
cockpit.
In the pictures you can see what this section looks like with the heat
shroud cut off. You can see the small sections of U-channel that hold the
shroud away from the inner pipe. They are spot welded on and many of the
spot welds have failed, leaving more holes in the pipe. You can even see a
new hole I found when I took the picture. You cannot see the BIG patch on
the back side of the pipe.
I STRONGLY recommend that you remove this section of exhaust and inspect the
inner pipe for any leaks.
You can see in the picture the new air supply hose I rigged up...works
great, but no heat now.
Does anyone have just this section of the exhaust available?
Fly Safe,
Steve Dalton
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p 0150#200150
Attachments:
http://forums.matronics.com//files/exhaust1_581.jpg
Message 19
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| Subject: | Re: Emergency Tank leak? |
The Yak has a very small filter screen at the base of the T fitting the pop
off valve is attached to.
Doc
From: owner-yak-list-server@matronics.com
[mailto:owner-yak-list-server@matronics.com] On Behalf Of Walter Lannon
Sent: Saturday, August 23, 2008 9:32 PM
Subject: Re: Yak-List: Re: Emergency Tank leak?
I am surprised. Would have assumed they all had a water filter. Comments
Dennis???
Walt
----- Original Message -----
From: sajdds@comcast.net
Sent: Saturday, August 23, 2008 10:54 AM
Subject: Re: Yak-List: Re: Emergency Tank leak?
Given the symilarities between the CJ and the Yak 52 has anyone formed an
opinion on whether the water filter is worth having? Should I add one to my
52? The 52 seems OK without one so maybe they are not needed in the CJ.
--
Steve Johnson
Yak 52
9900X
0B5
413 522-1130 Cell
-------------- Original message --------------
From: Walter Lannon <wlannon@persona.ca>
>
> The periodicity for water filter replacement is a function of hours flown
> AND humidity. In some climates (Florida?) it may be 5 hrs. or less and in
> others (Arizona?) maybe 50 Hrs.
> It is also totally dependant on draining the snot valve after every engine
> operation.
>
> Start with the water filter. That will give an indication of what you may
> find downstream.
>
> Walt
> ----- Original Message -----
> From: "skidmk"
> To:
> Sent: Saturday, August 23, 2008 3:54 AM
> Subject: Yak-List: Re: Emergency Tank leak?
>
>
> > --> Yak -List > _
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