What can I be allowed to do as a engineering/ maintenance intern at a european airline? I am just about to (hopefully) embark on a short internship at the maintenance department of a medium-sized european airline (i.e. under EASA framework). 

While the internship has been pushed towards being practical, one thing that bothers me is that I am absolutely clueless what I could be allowed to do (and I'd like to know so I could negotiate to get the most of the time with the carrier).

For instance:


Would I be allowed to handle anything flight-wise with supervision? Could I be allowed to interact with the aircraft or only watch and observe?
Would I be allowed to even loosen a bolt on a wheel, or do you legally need maintenance certification for that?
In europe the MRO are regulated by Part 145, this part precise that you have to be  Certifying staff (owner of part 66) to work on aircraft. 
For all other people you can't even loose a bolt except if you are under supervision of qualified Certifying staff.

For engineering work (without work on aircraft) you only need to have a sufficient degree (under company appreciation except for special works like airworthiness where this in precised in concerned regulation (Part M for example)).