Re: FAA and EASA personnel maintenance licensing
I believe the criteria to obtain an FAR145 certificate is mostly harmonized with Europe because there is a bilateral agreement between the two authorities.
This means that an FAR145 can apply for an EASA145 repair station certificate and the cert is valid for as long as their FAR145 is valid. They follow the quality and audit procedures from the FAA and not EASA.
Let's say you work for a UK airline. Your aircraft flies to the States where it has a night atop. You can contract your maintenance to an EASA part 145 organization that only employs A&P mechanics. They can legally allow their mechanics to certify for their work on your aircraft with their A&P certificate. Now usually these mechanics will have at least completed a level 3 type rating course, but I'm not 100% sure that is mandatory.
But now you have two different level of basic licence education requirements IE Part 66 and A&P, certifying the same aircraft.
The only restriction is that these mechanics can only exercise these certification privileges within their own country.
God created aircraft mechanics so that pilots can have heroes too.