I flew my (new to me) '87 A36 Bonanza at night for the first time recently
and discovered a whine when the panel lights where turned on. The flood
light switch / circuit doesn't do it and the rheostat for the panel light
dimmer changes the frequency.

Where do I start with the troubleshooting? I know any component has to be
replaced by an approved shop but I can read a meter. Could it be as simple
as a lose ground?

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TIA, {|;-)

Victor J. (Jim) Osborne, Jr.



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