Thanks for the detailed reply. It was a few days before the rain finally
ended here and I was able to take another look. It appears you are correct.
The other mag has the same sort of ground to the mag body. It looks like it
has been spliced into the p-lead near where it connects to the mag.

Would the electrical interference pose any threat to the avionics? Or would
the interference just be annoying?

Matt


What you are seeing is a break in the RFI shielding between the p-
lead's shield and the magneto body. This break does not prevent
"killing the mag" in the usual way, however, it could be the reason
you are hearing a "popping" noise on the weaker signals on your COM
radio.