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Dawg
Joined: 19 May 2013
Posts: 355
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 Posted: Wed Oct 04, 2017 7:20 am Post subject: Air |
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When I lower or raise the gear normally, the emergency air decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com
Cc:
Subject: Yak-List: Re: WON'T START
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_________________
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dsavarese0812(at)bellsout
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| Posted: Wed Oct 04, 2017 7:39 am Post subject: Air |
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CJ or Yak?
Sent from my iPhone
| Quote: | On Oct 4, 2017, at 11:19 AM, L129bs <l129bs(at)gmail.com> wrote:
When I lower or raise the gear normally, the emergency air decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com
Cc:
Subject: Re: WON'T START
…測´IšŠQh®é”±ëaxÆ®‰ârÂâ²Ñ^jÛ«zÃZ¾(¶Ší¡ºèÂDž隟"â²ÛŠX‰ë,¹ÈZ°¸¬µIÿJæìr¸©¶*'·!Š÷’yªÜ„:0žZw°ÚÈèÂÇ‚…«Eá¢Ú,…ªÞjwf¹Èf¹Èf¢·¡¶Úÿ 0™«k¢xœ±Ê&üÖ¯Š¢¶¸¬´ÀDãH %„S‘PÄ’jg ær‰íz{Z–ʽ¨¥i¹^¾&…åžlZ+ºk!¶Úýú+ºk&jÚèž',r‰cM $‹!$Ö ¢uÛ(™è§~‹h¶ŒjÚèž',f¢”¸¬µh¤Šm§ÿðŠH¦jÚèž',r‰‹ŠËB¢{k‰»Š‰Öy´¢µäájy2¢çè¯*.®§zº.²Ë©¦Ší1«m¶¥•ââ²Ð š)á¶Úÿ 0™«k¢xœ±Ê&ýÊ'¶¸›ºØ¨
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byronmfox(at)gmail.com
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| Posted: Wed Oct 04, 2017 7:58 am Post subject: Air |
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If yours is a CJ, the check valves on the starboard firewall need to be serviced.
Blitz Fox415-307-2405
On Oct 4, 2017, at 8:19 AM, L129bs <l129bs(at)gmail.com (l129bs(at)gmail.com)> wrote:
| Quote: | When I lower or raise the gear normally, the emergency air decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Cc:
Subject: Re: WON'T START
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wlannon(at)shaw.ca
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| Posted: Wed Oct 04, 2017 9:44 am Post subject: Air |
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Good call Blitz.
A drop in Emerg. press. would suggest internal leakage in the charge system check valve on the upper RH firewall.
Walt
From: Byron Fox (byronmfox(at)gmail.com)
Sent: Wednesday, October 04, 2017 8:57 AM
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Subject: Re: Air
If yours is a CJ, the check valves on the starboard firewall need to be serviced.
Blitz Fox 415-307-2405
On Oct 4, 2017, at 8:19 AM, L129bs <l129bs(at)gmail.com (l129bs(at)gmail.com)> wrote:
| Quote: | When I lower or raise the gear normally, the emergency air decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Cc:
Subject: Re: WON'T START
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 Virus-free. www.avast.com [url=#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2] [/url]
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Clouddog
Joined: 02 Jun 2016
Posts: 117
Location: Lebanon, TN
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| Posted: Wed Oct 04, 2017 10:09 am Post subject: Air |
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On the CJ, rebuild or replace the check valve on the right side of firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs(at)gmail.com (l129bs(at)gmail.com)> wrote: | Quote: | When I lower or raise the gear normally, the emergency air decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Cc:
Subject: Re: WON'T START
|
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http://www.matronics.com/Navigator?Yak-List |
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markdavis(at)wbsnet.org
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| Posted: Wed Oct 04, 2017 10:53 am Post subject: Air |
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The aircraft having the issue is a YAK-52. Do they have the same check valve as the Nanchang?
From: owner-yak-list-server(at)matronics.com [mailto:owner-yak-list-server(at)matronics.com] On Behalf Of Greg Wrobel
Sent: Wednesday, October 04, 2017 12:08 PM
To: yak-list(at)matronics.com
Subject: Re: Air
On the CJ, rebuild or replace the check valve on the right side of firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs(at)gmail.com (l129bs(at)gmail.com)> wrote:
When I lower or raise the gear normally, the emergency air decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com)
Cc:
Subject: Re: WON'T START
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
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dougsappllc(at)gmail.com
Guest
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| Posted: Wed Oct 04, 2017 12:02 pm Post subject: Air |
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The Yak 52 uses a different check valve than the CJ6.
We recently developed a conversion to allow the CJ6 check valve to be used on the 52. The CJ6 check valves are lower cost and are very easy to maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
Doug
On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis(at)wbsnet.org (markdavis(at)wbsnet.org)> wrote:
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
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dsavarese0812(at)bellsout
Guest
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| Posted: Wed Oct 04, 2017 1:35 pm Post subject: Air |
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Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak 52
check valves over to CJ check valves. Those two were on the firewall on
each side of the pressure relief valve. The other 3 are:
-2 under thefloor in the rear cockpit and connectto the input side of
the Yak 52 brake reducing valve; one side for the emergency system and
one for the main system. (real pain in the rear to get to. So unlikely
they will be changed unless a problem existed.)
-1 at the input of the external air fill port which allows airflow to
the emergency air tank from the external air fill port.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 4:01 PM, doug sapp wrote:
| Quote: | The Yak 52 uses a different check valve than the CJ6.
We recently developed a conversion to allow the CJ6 check valve to be
used on the 52. The CJ6 check valves are lower cost and are very easy
to maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
Doug
On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis(at)wbsnet.org
<mailto:markdavis(at)wbsnet.org>> wrote:
The aircraft having the issue is a YAK-52. Do they have the same
check valve as the Nanchang?
*From:*owner-yak-list-server(at)matronics.com
<mailto:owner-yak-list-server(at)matronics.com>
[mailto:owner-yak-list-server(at)matronics.com
<mailto:owner-yak-list-server(at)matronics.com>] *On Behalf Of *Greg
Wrobel
*Sent:* Wednesday, October 04, 2017 12:08 PM
*To:* yak-list(at)matronics.com <mailto:yak-list(at)matronics.com>
*Subject:* Re: Air
On the CJ, rebuild or replace the check valve on the right side of
firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs(at)gmail.com
<mailto:l129bs(at)gmail.com>> wrote:
When I lower or raise the gear normally, the emergency air
decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com
<mailto:billdykes52(at)hotmail.com>>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com <mailto:yak-list(at)matronics.com>
Cc:
Subject: Re: WON'T START
|
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
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markdavis(at)wbsnet.org
Guest
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| Posted: Wed Oct 04, 2017 1:43 pm Post subject: Air |
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YAK 52. The issue he's having is that he's depleting air from the emergency system when actuating the landing gear with the emergency air system CLOSED and normal pressures on main system.
Mark
--
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dsavarese0812(at)bellsout
Guest
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| Posted: Wed Oct 04, 2017 1:55 pm Post subject: Air |
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Is this a totally stock Yak 52 or has there been any modifications to
the pneumatic system?
Did the problem just occur or did it happen after doing a gear
retraction/extension test including extending the gear with the
emergency system?
If the air is depletingon both main and emergency sidesusing the gear,
what happens to both side when you move the flaps up and down several times?
What happens if you squeeze the brakes several times until you can
physically see the main air side going down?
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 5:42 PM, Mark Davis wrote:
[quote]
YAK 52. The issue he's having is that he's depleting air from the emergency system when actuating the landing gear with the emergency air system CLOSED and normal pressures on main system.
Mark
--
| | - 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:
http://www.matronics.com/Navigator?Yak-List |
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dougsappllc(at)gmail.com
Guest
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| Posted: Wed Oct 04, 2017 2:17 pm Post subject: Air |
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Dennis,My records show that he purchased 6 check valves, rather he installed them all I do not know. I do recall that he called back needing a 90 degree fitting for one location.
Doug
On Wed, Oct 4, 2017 at 2:34 PM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
| Quote: | --> Yak-List message posted by: "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)>
Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak 52 check valves over to CJ check valves. Those two were on the firewall on each side of the pressure relief valve. The other 3 are:
-2 under thefloor in the rear cockpit and connectto the input side of the Yak 52 brake reducing valve; one side for the emergency system and one for the main system. (real pain in the rear to get to. So unlikely they will be changed unless a problem existed.)
-1 at the input of the external air fill port which allows airflow to the emergency air tank from the external air fill port.
Dennis
A. Dennis Savarese
[url=tel:334-546-8182]334-546-8182[/url] (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 4:01 PM, doug sapp wrote:
| Quote: | The Yak 52 uses a different check valve than the CJ6.
We recently developed a conversion to allow the CJ6 check valve to be used on the 52. The CJ6 check valves are lower cost and are very easy to maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
Doug
On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis(at)wbsnet.org (markdavis(at)wbsnet.org) <mailto:markdavis(at)wbsnet.org (markdavis(at)wbsnet.org)>> wrote:
The aircraft having the issue is a YAK-52. Do they have the same
check valve as the Nanchang?
*From:*owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)
<mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)>
[mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)
<mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)>] *On Behalf Of *Greg
Wrobel
*Sent:* Wednesday, October 04, 2017 12:08 PM
*To:* yak-list(at)matronics.com (yak-list(at)matronics.com) <mailto:yak-list(at)matronics.com (yak-list(at)matronics.com)>
*Subject:* Re: Air
On the CJ, rebuild or replace the check valve on the right side of
firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs(at)gmail.com (l129bs(at)gmail.com)
<mailto:l129bs(at)gmail.com (l129bs(at)gmail.com)>> wrote:
When I lower or raise the gear normally, the emergency air
decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)
<mailto:billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)>>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com) <mailto:yak-list(at)matronics.com (yak-list(at)matronics.com)>
Cc:
Subject: Re: WON'T START
|
====================================
List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?Yak-List
====================================
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
====================================
WIKI -
errer" target="_blank">http://wiki.matronics.com
====================================
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
====================================
|
| | - 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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dsavarese0812(at)bellsout
Guest
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| Posted: Wed Oct 04, 2017 3:41 pm Post subject: Air |
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Doug,
I know the Yak 50 uses the same Chinese check valvestoo. The 90 deg
fittingis used by bothcheck valves on either side of the pop off valve
on the firewall of the Yak 52.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 6:16 PM, doug sapp wrote:
| Quote: | Dennis,
My records show that he purchased 6 check valves, rather he installed
them all I do not know. I do recall that he called back needing a 90
degree fitting for one location.
Doug
On Wed, Oct 4, 2017 at 2:34 PM, A. Dennis Savarese
<dsavarese0812(at)bellsouth.net <mailto:dsavarese0812(at)bellsouth.net>> wrote:
<dsavarese0812(at)bellsouth.net <mailto:dsavarese0812(at)bellsouth.net>>
Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak
52 check valves over to CJ check valves. Those two were on the
firewall on each side of the pressure relief valve. The other 3 are:
-2 under thefloor in the rear cockpit and connectto the input side
of the Yak 52 brake reducing valve; one side for the emergency
system and one for the main system. (real pain in the rear to get
to. So unlikely they will be changed unless a problem existed.)
-1 at the input of the external air fill port which allows airflow
to the emergency air tank from the external air fill port.
Dennis
A. Dennis Savarese
334-546-8182 <tel:334-546-8182>(mobile)
www.yak-52.com <http://www.yak-52.com>
Skype - Yakguy1
On 10/4/2017 4:01 PM, doug sapp wrote:
The Yak 52 uses a different check valve than the CJ6.
We recently developed a conversion to allow the CJ6 check
valve to be used on the 52. The CJ6 check valves are lower
cost and are very easy to maintain, Roger Kemp converted his
52 to CJ6 check valves recently.
Doug
On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis
<markdavis(at)wbsnet.org <mailto:markdavis(at)wbsnet.org>
<mailto:markdavis(at)wbsnet.org <mailto:markdavis(at)wbsnet.org>>>
wrote:
The aircraft having the issue is a YAK-52. Do they have
the same
check valve as the Nanchang?
*From:*owner-yak-list-server(at)matronics.com
<mailto:owner-yak-list-server(at)matronics.com>
<mailto:owner-yak-list-server(at)matronics.com
<mailto:owner-yak-list-server(at)matronics.com>>
[mailto:owner-yak-list-server(at)matronics.com
<mailto:owner-yak-list-server(at)matronics.com>
<mailto:owner-yak-list-server(at)matronics.com
<mailto:owner-yak-list-server(at)matronics.com>>] *On Behalf Of *Greg
Wrobel
*Sent:* Wednesday, October 04, 2017 12:08 PM
*To:* yak-list(at)matronics.com
<mailto:yak-list(at)matronics.com> <mailto:yak-list(at)matronics.com
<mailto:yak-list(at)matronics.com>>
*Subject:* Re: Air
On the CJ, rebuild or replace the check valve on the right
side of
firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs(at)gmail.com
<mailto:l129bs(at)gmail.com>
<mailto:l129bs(at)gmail.com <mailto:l129bs(at)gmail.com>>> wrote:
When I lower or raise the gear normally, the emergency air
decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com
<mailto:billdykes52(at)hotmail.com>
<mailto:billdykes52(at)hotmail.com
<mailto:billdykes52(at)hotmail.com>>>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com <mailto:yak-list(at)matronics.com>
<mailto:yak-list(at)matronics.com <mailto:yak-list(at)matronics.com>>
Cc:
Subject: Re: WON'T START
====================================
List" rel="noreferrer"
target="_blank">http://www.matronics.com/Navigator?Yak-List
====================================
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
====================================
WIKI -
errer" target="_blank">http://wiki.matronics.com
====================================
b Site -
-Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
====================================
|
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wlannon(at)shaw.ca
Guest
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| Posted: Wed Oct 04, 2017 3:41 pm Post subject: Air |
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Hmmm;
If this were a CJ the (presumably) offending check valve is the one that
allows the EM tank to be charged in the SYSTEM CLOSED position as it must
be. Normally
this is done in conjunction with charging the main air tank with that system
OPEN but can also be done independent of the main tank with the main system
closed.
I take advantage of that feature to maintain a mostly N2 charge in the EM
tank.
BUT this is a not a CJ and I have no knowledge of the Yak 52. Have heard
that the EM tank is charged separately from the main. If so, is there an
on-board charging circuit built into the aircraft that you hook up to? Or
do you remove the tank?
If an on-board circuit then chances are you have the same (though Russian
style) check valve - non return as the CJ somewhere in the system.
Walt
From: Mark Davis
Sent: Wednesday, October 04, 2017 2:42 PM
To: yak-list(at)matronics.com
Subject: RE: Air
YAK 52. The issue he's having is that he's depleting air from the emergency
system when actuating the landing gear with the emergency air system CLOSED
and normal pressures on main system.
Mark
--
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dsavarese0812(at)bellsout
Guest
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| Posted: Wed Oct 04, 2017 6:14 pm Post subject: Air |
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Essentially Walt, there is a Y fitting on the external air fill port.
One side, with a check valve, fills the emergency tank and the other leg
of the Y fills the main tank. Once the emergency tank is filled from the
external air fill port, it's filled. The only way it can go down is to
open one of the two emergency air valves or there is a leak. There
simply is no common connection between the main and emergency systems
without one of the two emergency air valve being open.
If anyone is thinking that it could be one of the instruments leaking
between the two sides, it's impossible because behind the common
faceplate of the instrument are two separate instrument housings with no
connection between the two.
The emergency air system on the 52 is completely isolated from the main
air system. That'sthe reason I asked the questions that I did earlier.
Once I get the answers to the questions, I'll try diagnosing the problem
further. Hopefully I'll be able to help.
Dennis
A. Dennis Savarese
334-546-8182 (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 7:39 PM, Walter Lannon wrote:
[quote]
Hmmm;
If this were a CJ the (presumably) offending check valve is the one
that allows the EM tank to be charged in the SYSTEM CLOSED position as
it must be. Normally
this is done in conjunction with charging the main air tank with that
system OPEN but can also be done independent of the main tank with the
main system closed.
I take advantage of that feature to maintain a mostly N2 charge in the
EM tank.
BUT this is a not a CJ and I have no knowledge of the Yak 52. Have
heard that the EM tank is charged separately from the main. If so, is
there an on-board charging circuit built into the aircraft that you
hook up to? Or do you remove the tank?
If an on-board circuit then chances are you have the same (though
Russian style) check valve - non return as the CJ somewhere in the
system.
Walt
From: Mark Davis
Sent: Wednesday, October 04, 2017 2:42 PM
To: yak-list(at)matronics.com
Subject: RE: Air
YAK 52. The issue he's having is that he's depleting air from the
emergency system when actuating the landing gear with the emergency
air system CLOSED and normal pressures on main system.
Mark
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wlannon(at)shaw.ca
Guest
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| Posted: Wed Oct 04, 2017 8:09 pm Post subject: Air |
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Yes --- "or if there is a leak". That check valve is a potential leak
source.
Whether it is the culprit in this case I certainly don't know but it seems
to fit the description and should be checked out.
Walt
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Viperdoc
Joined: 19 Apr 2014
Posts: 484
Location: 08A
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| Posted: Wed Oct 04, 2017 9:21 pm Post subject: Air |
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I stopped at the Firewall conversion. Works fine. My leak was on the system side at the firewall. I plan to change the FCP shut off valves out as soon as I have time.
Had a family medical issue that grounded me for the summer. System has sat for approx. 3 months. The system had lost 1 ATM over 3 months as of last Sunday.
Doc
Sent from my iPad
On Oct 4, 2017, at 5:16 PM, doug sapp <dougsappllc(at)gmail.com (dougsappllc(at)gmail.com)> wrote:
| Quote: | Dennis,My records show that he purchased 6 check valves, rather he installed them all I do not know. I do recall that he called back needing a 90 degree fitting for one location.
Doug
On Wed, Oct 4, 2017 at 2:34 PM, A. Dennis Savarese <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)> wrote:
| Quote: | --> Yak-List message posted by: "A. Dennis Savarese" <dsavarese0812(at)bellsouth.net (dsavarese0812(at)bellsouth.net)>
Icould be wrong, but I believe Doc Kemp converted 2 of the 5 Yak 52 check valves over to CJ check valves. Those two were on the firewall on each side of the pressure relief valve. The other 3 are:
-2 under thefloor in the rear cockpit and connectto the input side of the Yak 52 brake reducing valve; one side for the emergency system and one for the main system. (real pain in the rear to get to. So unlikely they will be changed unless a problem existed.)
-1 at the input of the external air fill port which allows airflow to the emergency air tank from the external air fill port.
Dennis
A. Dennis Savarese
[url=tel:334-546-8182]334-546-8182[/url] (mobile)
www.yak-52.com
Skype - Yakguy1
On 10/4/2017 4:01 PM, doug sapp wrote:
| Quote: | The Yak 52 uses a different check valve than the CJ6.
We recently developed a conversion to allow the CJ6 check valve to be used on the 52. The CJ6 check valves are lower cost and are very easy to maintain, Roger Kemp converted his 52 to CJ6 check valves recently.
Doug
On Wed, Oct 4, 2017 at 11:52 AM, Mark Davis <markdavis(at)wbsnet.org (markdavis(at)wbsnet.org) <mailto:markdavis(at)wbsnet.org (markdavis(at)wbsnet.org)>> wrote:
The aircraft having the issue is a YAK-52. Do they have the same
check valve as the Nanchang?
*From:*owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)
<mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)>
[mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)
<mailto:owner-yak-list-server(at)matronics.com (owner-yak-list-server(at)matronics.com)>] *On Behalf Of *Greg
Wrobel
*Sent:* Wednesday, October 04, 2017 12:08 PM
*To:* yak-list(at)matronics.com (yak-list(at)matronics.com) <mailto:yak-list(at)matronics.com (yak-list(at)matronics.com)>
*Subject:* Re: Air
On the CJ, rebuild or replace the check valve on the right side of
firewall.
On Oct 4, 2017 11:24 AM, "L129bs" <l129bs(at)gmail.com (l129bs(at)gmail.com)
<mailto:l129bs(at)gmail.com (l129bs(at)gmail.com)>> wrote:
When I lower or raise the gear normally, the emergency air
decreases as does the normal air quantity???
Any ideas?
Sent from my Samsung Galaxy smartphone.
-------- Original message --------
From: Bill1200 <billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)
<mailto:billdykes52(at)hotmail.com (billdykes52(at)hotmail.com)>>
Date:2017/10/02 1:52 PM (GMT-07:00)
To: yak-list(at)matronics.com (yak-list(at)matronics.com) <mailto:yak-list(at)matronics.com (yak-list(at)matronics.com)>
Cc:
Subject: Re: WON'T START
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