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RE: Europa-List: Voltage reading of 25V

Subject: RE: Europa-List: Voltage reading of 25V
From: Greg Fuchs <gregoryf.flyboy@comcast.net>
Date: Wed, 28 Jul 2010 22:02:43
Hmm..Not sure,

My first thought was along the line of what Ira had said..bad ground
somewhere.

 Try making some measurements between the power and ground rails with a
handheld meter to confirm what the EIS was reading. Take the measurements
with the key on and the engine off, to eliminate all chance of actually
producing deadly avionics voltages from a spinning alternator. What is the
EIS reading in this configuration(engine off)? Could there be something that
was connected to the rear-ward wiring that became disconnected when moving
the battery up front? Is the ground strap to the engine block still
connected?

Greg

  _____  

From: owner-europa-list-server@matronics.com
[mailto:owner-europa-list-server@matronics.com] On Behalf Of Karl Heindl
Sent: Wednesday, July 28, 2010 12:23 PM
Subject: Europa-List: Voltage reading of 25V


This one is for you electric specialists:

All I did was to move the battery back to the firewall from the rear
fuselage. I fire up the engine for a highspeed taxi test for my MG
configuration and I get a voltage reading of 25.
I swapped regulators - I always carry a spare  - but no change. I also get
the same reading with the alternator switched off. What could I possibly
have screwed up ? 
To make things even more perplexing, the oil pressure indication does not
drop below 93, as the engine is warming up, but maybe the two are somehow
related. All readings are from the EIS. Never had a problem like this
before. 
Any help appreciated.
Thanks,    Karl



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