8/17/2008
To reply to the author, write to "F. Tim Yoder" <ftyoder@yoderbuilt.com>
Report on this weekends search for Gremlins;
I spent several hours under the panel checking all the ground buss
connections, breaker and switch grounds. I loosened the connections to the
amp, volt, oil temp and oil pressure gauges, wiggled the terminals and re
tightened. I did the same thing to the alternator and removed the regulator
spades and replaced them.I removed the radio, cleaned the connectors and re
installed it. I checked the ground straps from the engine to the motor
mount. I spent some time looking for something,anything wrong.
I started the plane and found that I had not ran off any Gremlins. When I
turn on the Alt. the oil pressure dropped from 75# to 60# then settled on
70#, this takes about one second. As soon as I turn off the Alt. the oil
pressure goes back to 75#. With the radio and Alt. on the oil pressure
needle drops a needle width when I key the radio. Again, with the Alt. off
keying the radio does not effect the oil pressure gauge which was back to
75#.
I did not fly so I didn't have any radio issues. I think I need to find the
cause of the apparent load on the oil pressure gauge first.
Oh, the Amp. meter is a little positive at idle and the voltage is showing
a charge of about 14.4V and 13.5V with at Alt. off.
I'll appreciate any suggestions.
Thanks again, Tim
