Last week I had to acknowledge the pilots bill of rights. This week I was informed that a non-TSO radio voids the airworthiness certificate, and that I could be violated for each flight subsequent to installation.
This means you will have to send my mail to Guantanamo - the first was installed in 2016, and these aircraft fly darn near every day.
The guy who delivered this news is new, and is being guided by someone else. He is a very pleasant guy, and I do not mind working with him. He was just delivering a message. He also says he has found a "job aid" that places any avionics installation in the major alteration category. He promises a link. More on that later.
And -surprise! Giving a flight review in a Super Cub today, and just incidentally explained the interference problem. The student (owner) said "is that what all that noise comes from!"
The radio? A Garmin GNC 300 XL TSO. The plot thickens.