If you were flying on a JAR licence, you would need to have a valid LPC(licence proficiency check) valid for 12 months, signed and in your licence to operate the aircraft. This needs to signed by a JAR approved TRE (type rating examiner)
Your situation will probably need to be assessed by which ever EU aviation authority is validating your FAA licence as is not covered clearly by the regulations.
if you have a "check" signed off in you log book by an FAA authorised examiner they might accept this.