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Yak-List Digest: 1 Msgs - 12/14/25

 
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draftsjust417(at)gmail.co
Guest
PostPosted: Tue Dec 16, 2025 10:18 am    Post subject: Yak-List Digest: 1 Msgs - 12/14/25 Reply with quote
Mike, any luck chasing the Yak's wiring gremlin?
Hadn't seen any responses, so I'll chime in w/ my hillbilly 2-cents worth.
My Nanchang was fraught with electrical issues years ago, and I wisely 
decided to just get down to basics and refurb all the ground connections 
(= Scotchbrite all terminals, alcohol clean, reinstall w/ a tiny dab of sealing
"No-Ox Special-A" terminal paste).  That helps a lot.
My initial, "Capt.Obvious" thought is you've got a nasty short lurking... disconnecting 
the battery was the best thing you could have done, as well as staging for troubleshooting.
Since everything worked so well on previous flight, I'm guessing it's just in 1 spot, so
visually inspecting wire runs from battery to the cockpit switch box can be a good first chore.
Doesn't take much at all to create a short in a Nanchang...
Pls keep us posted on progress...   
Justin
N280NC, Seattle
On Sun, Dec 14, 2025 at 11:35 PM Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)> wrote:

Quote:
*

 =========================
   Online Versions of Today's List Digest Archive
 =========================

Today's complete Yak-List Digest can also be found in either of the
two Web Links listed below.  The .html file includes the Digest formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes
and Message Navigation.  The .txt file includes the plain ASCII version
of the Yak-List Digest and can be viewed with a generic text editor
such as Notepad or with a web browser.

HTML Version:

    http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2025-12-14&Archive=Yak

Text Version:

    http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2025-12-14&Archive=Yak


 =======================
   EMail Version of Today's List Digest Archive
 =======================


           ----------------------------------------------------------
                           Yak-List Digest Archive
                                      ---
                     Total Messages Posted Sun 12/14/25: 1
           ----------------------------------------------------------


Today's Message Index:
----------------------

     1. 01:42 AM - Unusual Electric Problem  (Stressmerchant)



________________________________  Message 1  _____________________________________


Time: 01:42:13 AM PST US
Subject: Unusual Electric Problem
From: "Stressmerchant" <mike_beresford(at)yahoo.co.uk (mike_beresford(at)yahoo.co.uk)>


I encountered an unusual electric problem with my Yak-52 today. I haven't yet been
able to do any real trouble shooting, will only have time later in the week.

The aircraft has recently been for maintenance. Performed well for post-maintenance
test flight, and no issues on the short ferry flight home.

Took a work colleague flying today. No issues on flight, landed, shut down normally.
Once I had pushed the aircraft back in the hangar, I went to put the canopy
cover over the aircraft - keeps dust off during the week. I noticed that a
light was on in the rear cockpit - the warning light that the master switch in
the front cockpit was on. I looked, master switch was off - as were all others.
I then turned the master switch on and off, to see if that cured the problem.
Not only did it fail to cure the problem, no electrics came on at all when
the master switch was in the on poisition - except the rear cockpit light that
remained illuminated. No electrics at all - no fuel tank bars, no gear lights,
nothing registering on the voltmeter.

I didn't have time to investiage fully, so I just disconnected the battery and
left it at that. But I am puzzled by this. The aircraft had been flying fine,
no issues with anything electric, radios working, etc. But following the shutdown,
nothing appears to work - except a single rear cockpit light telling me that
the master switch is on.

Any ideas on where to start looking? I'm thinking that my first port of call wil
be a voltage check on the battery - although they are fairly new, it could be
that one has died completely.


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=516725#516725




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markbitterlich(at)embarqm
Guest
PostPosted: Tue Dec 16, 2025 11:11 am    Post subject: Yak-List Digest: 1 Msgs - 12/14/25 Reply with quote
I'd suspect the power on relay in the main electrical panel. Gray box right side forward of cockpit access panel, two thumb knobs hold the cover on.  

You'll really need some electrical schematics here
. There is also a main bus fuse inside this box that is suspect. This assuming battery voltage is good. 
Hopefully you've got battery issues. That would be easy.
Mark Bitterlich 
N50YK
-------- Original message --------
From: Justin Drafts <draftsjust417(at)gmail.com>
Date: 12/16/25 1:21 PM (GMT-05:00)
To: yak-list(at)matronics.com
Subject: Yak-List: Re: Yak-List Digest: 1 Msgs - 12/14/25

Mike, any luck chasing the Yak's wiring gremlin?
Hadn't seen any responses, so I'll chime in w/ my hillbilly 2-cents worth.
My Nanchang was fraught with electrical issues years ago, and I wisely 
decided to just get down to basics and refurb all the ground connections 
(= Scotchbrite all terminals, alcohol clean, reinstall w/ a tiny dab of sealing
"No-Ox Special-A" terminal paste).  That helps a lot.
My initial, "Capt.Obvious" thought is you've got a nasty short lurking... disconnecting 
the battery was the best thing you could have done, as well as staging for troubleshooting.
Since everything worked so well on previous flight, I'm guessing it's just in 1 spot, so
visually inspecting wire runs from battery to the cockpit switch box can be a good first chore.
Doesn't take much at all to create a short in a Nanchang...
Pls keep us posted on progress...   
Justin
N280NC, Seattle
On Sun, Dec 14, 2025 at 11:35 PM Yak-List Digest Server <yak-list(at)matronics.com (yak-list(at)matronics.com)> wrote:

Quote:
*

 =========================
   Online Versions of Today's List Digest Archive
 =========================

Today's complete Yak-List Digest can also be found in either of the
two Web Links listed below.  The .html file includes the Digest formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes
and Message Navigation.  The .txt file includes the plain ASCII version
of the Yak-List Digest and can be viewed with a generic text editor
such as Notepad or with a web browser.

HTML Version:

    http://www.matronics.com/digest/digestview.php?Style=82701&View=html&Chapter=2025-12-14&Archive=Yak

Text Version:

    http://www.matronics.com/digest/digestview.php?Style=82701&View=txt&Chapter=2025-12-14&Archive=Yak


 =======================
   EMail Version of Today's List Digest Archive
 =======================


           ----------------------------------------------------------
                           Yak-List Digest Archive
                                      ---
                     Total Messages Posted Sun 12/14/25: 1
           ----------------------------------------------------------


Today's Message Index:
----------------------

     1. 01:42 AM - Unusual Electric Problem  (Stressmerchant)



________________________________  Message 1  _____________________________________


Time: 01:42:13 AM PST US
Subject: Yak-List: Unusual Electric Problem
From: "Stressmerchant" <mike_beresford(at)yahoo.co.uk (mike_beresford(at)yahooco.uk)>


I encountered an unusual electric problem with my Yak-52 today. I haven't yet been
able to do any real trouble shooting, will only have time later in the week

The aircraft has recently been for maintenance. Performed well for post-maintenance
test flight, and no issues on the short ferry flight home.

Took a work colleague flying today. No issues on flight, landed, shut down normally.
Once I had pushed the aircraft back in the hangar, I went to put the canopy
cover over the aircraft - keeps dust off during the week. I noticed that a
light was on in the rear cockpit - the warning light that the master switch in
the front cockpit was on. I looked, master switch was off - as were all others.
I then turned the master switch on and off, to see if that cured the problem.
Not only did it fail to cure the problem, no electrics came on at all when
the master switch was in the on poisition - except the rear cockpit light that
remained illuminated. No electrics at all - no fuel tank bars, no gear lights,
nothing registering on the voltmeter.

I didn't have time to investiage fully, so I just disconnected the battery and
left it at that. But I am puzzled by this. The aircraft had been flying fine,
no issues with anything electric, radios working, etc. But following the shutdown,
nothing appears to work - except a single rear cockpit light telling me that
the master switch is on.

Any ideas on where to start looking? I'm thinking that my first port of call wil
be a voltage check on the battery - although they are fairly new, it could be
that one has died completely.


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=516725#516725




===========
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.
="noreferrer" target="_blank">https://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:

http://www.matronics.com/Navigator?Yak-List
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