10540
The insurance would be an odd one. You have to be fully FAA licenced to meet insurance requirements on an FAA reg aircraft.
Example say you held all the EASA licences but not FAA you would not be insured to fly the FAA aircraft.
In that way any EASA licences would have NO bearing on the FAA aircraft they would purely be a technical requirement of EASA.
As such unless the insurance specifically requires you to hold the EASA licence as part of the insurance document you are fully licenced to fly the FAA aircraft with the EASA licences as a state requirement which has no relevance as such to the aircraft.
Pace