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  #1  
Old 01-23-2021, 02:39 PM
JackinMichigan's Avatar
JackinMichigan JackinMichigan is offline
 
Join Date: Nov 2012
Location: Canton, MI
Posts: 237
Default Problems with my Garmin GMA 240 audio panel

I was doing some pattern work in my RV-10 today, and I was hearing a noise like someone was keying their mic. I would sometimes hear this at night when someone was trying to light up the runway lights, but this was in broad daylight with only one other plane in the pattern. I finally deduced that I was the only one hearing this, and that's when I noticed all the lights on the GMA 240 panel would flash in unison when I heard this noise.

Obviously there's something screwy with the audio panel. I have no idea what it could be or how to fix it. Any ideas?
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RV-10 N1861G
Build #41389, started Oct 2012
Current status: 1st Flight 11/10/17
50 hour oil change: 8/29/19
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  #2  
Old 01-23-2021, 04:30 PM
Ironflight's Avatar
Ironflight Ironflight is offline
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Join Date: Jan 2005
Location: Dayton, NV
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First thing I’d do is pull it out and re-seat it - might be a loose connection, or a little corrosion on a contact.
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  #3  
Old 01-23-2021, 05:40 PM
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Longez Longez is offline
 
Join Date: May 2009
Location: KS
Posts: 169
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Quote:
Originally Posted by JackinMichigan View Post
I was doing some pattern work in my RV-10 today, and I was hearing a noise like someone was keying their mic. I would sometimes hear this at night when someone was trying to light up the runway lights, but this was in broad daylight with only one other plane in the pattern. I finally deduced that I was the only one hearing this, and that's when I noticed all the lights on the GMA 240 panel would flash in unison when I heard this noise.

Obviously there's something screwy with the audio panel. I have no idea what it could be or how to fix it. Any ideas?
Jack,

The flashing lights may mean that the power connection to the GMA 240 is unreliable, so check that the power connection to the circuit protection device is secure.

The GMA 240 is pretty bullet-proof, so probably something simple.

Steve
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