Mailing List lml@lancaironline.net Message #54271
From: randy snarr <randylsnarr@yahoo.com>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: voltage variation
Date: Thu, 21 Jan 2010 16:53:05 -0500
To: <lml@lancaironline.net>
Don,
I have the switch you describe. I will check it the next time I fly...
Thanks!!!
Randy Snarr

--- On Tue, 1/19/10, donaldgordon@bellsouth.net <donaldgordon@bellsouth.net> wrote:

From: donaldgordon@bellsouth.net <donaldgordon@bellsouth.net>
Subject: [LML] Re: voltage variation
To: lml@lancaironline.net
Date: Tuesday, January 19, 2010, 4:19 AM

Message
>> The voltage hovers around 14.5v with little load and drops to 12.5
or so  with a load at cruise
 
Randy,
 
I have had a slightly similar situation on two occasions over my 1500 hours on my Lancair 320.  I am using the split style Cessna master switch in my panel.  I just replaced this switch, again, and my voltage fluctuations disappeared.  If you are using this switch, I suggest you try wiggling the switch around to see if it temporarily fixes your problem (mine did).  If it does, you might consider replacing it ($26 from ACS).  I don't understand why these style switches have this problem.  Perhaps corrosion and/or pitting is a problem.  For some reason, I only experienced this problem in-flight.  Shutting off all of my electrical equipment during my in-flight diagnostics, however, did not fix the voltage variations.
 
 
Don

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