)))
as I wrote - possibly I am really mistaken and current rules are, that no way to fly, despite smone holds EASA cert.
I have questionable obsolete info, that certain EU countries do permit to fly using US docs despite if it is PP ot ATP and any ratings... you may fly only day vfr inside certain country airspace or whole EU depending on the certain state rules.
If it is not true/ bs/ obsolete etc. - better erase this thread...