So B2 plus the type course of that aircraft to work and certify it's fitness?
Yeah, to certify a task you need a basic license of the applicable trade (B1 or B2), a type course for that aircraft AND the company you're working for will have to grant you a company approval.
Experience:
The amout required varies, for example,
1) IF you complete a recognised course at an approved 147 training facility, you only need 2 years experience for the B2.
2) IF you're already qualified in another trade,motor mechanic or domestic electrician for example, the B2 may be granted in 3 years.
3) IF you get a job working as a mechanic, and take the exmas in your spare time, you need to prove the full 5 years for the B2.
Option 3, in my opinion, is the best route (but by no means the easiest), and by large the one most people take. If you find a college who does a 2 year license course then you'll have your B2 in 4 years instead of 5, however you'll be lacking in experience compared to guys who have taken the other routes.
I read some where that after every 5 years you have to take the papers again to renew your licence?
You DO have to renew the license every 5 years, but to do so is only a matter of proving to the authority that you've actually been using it. No extra study required!