I'm with EASA 145 working on large commercial aircraft.
Basically my questions are regarding 145 MRO doing large passenger aircraft, but I think all 145 run with roughly the same rules
Under EASA system, there's the B1(mechanical) & B2(avionics) license issued by the authority.
Under B1, there are a list of privilege & limitations. But when working under a 145 MRO, they normally restrict you even further.
Example, as a B1, you can certify for certain structural repair, but under a 145, they normally have an internal system where they have "specialist" structural repair persons, who certify for the repair themselves.
As for the US system, I believe A&P covers everything (no trade like EASA mechanical & avionics). But with new large aircraft being more complex, does a FAR 145 station have "specialists" instead of an all in one A&P guy who can certify for everything?