"Ron Natalie" wrote in message
m...

"Dan Truesdell" wrote in message
...
I had an interesting conversation with out local FSDO today. He
basically reported the FAA party line that anything that is "physically
attached" to a production aircraft must have an STC/337/what-ever to be
legal.

This argument is not supported by the regulation (depending on what you
mean by "what-ever"). A 337 is filed persuant to major modification.

There are three signature levels for a 337, but it is required for the
airplane to return to service, after a change.

The rule defining major modification doesn't say "anything attacdhed to
an aircraft." This is a figment of the FAA field organizaiton.