Easa european aviation safety agency easa has

EASA – European Aviation Safety Agency
EASA has jurisdiction over new type certificates and other design-related airworthiness
approvals for aircraft, engines, propellers and parts. EASA works with the National Aviation

Authorities (NAAs) of the EU members but has taken over many of their functions in the interest
of aviation standardisation across the EU and non-EU member Turkey. EASA is also responsible
for assisting the European Commission in negotiating international harmonisation agreements
with the 'rest of the world' (ROW) on behalf of the EU member states and also concludes
technical agreements at a working level directly with its counterparts around the world such as
the US Federal Aviation Administration (FAA).
Part-66 was based on the older JAR system and the required training level followed the ATA
104 system. There are 3 levels of authorization:
Category A -
(Line Maintenance Mechanic): Basic A category License + Task Training (Level depends
on Task Complexity) + Company Certification Authorization for specific Tasks ("A category A aircraft
maintenance licence permits the holder to issue certificates of release to service following minor
scheduled line maintenance and simple defect rectification within the limits of tasks specifically endorsed
on the authorisation. The certification privileges shall be restricted to work that the licence holder has
personally performed in a Part-145 organisation"),
Category B1 (Mechanical) and/or B2(Avionics) (Line Maintenance Technician): Basic B1/B2
category Licensce + Type Training (i.e. Line and Base Maintenance I.A.W. Part-66 Appendix III Level
III) + Company Certification Authorization ("a category B1 aircraft maintenance licence shall permit the
holder to issue certificates of release to service following maintenance, including aircraft structure,
powerplant and mechanical and electrical systems. Replacement of avionic line replaceable units,
requiring simple tests to prove their serviceability, shall also be included in the privileges. Category B1
shall automatically include the appropriate 'A' subcategory", a Category B2 aircraft maintenance licence
shall permit the holder to issue certificates of release to service following maintenance on avionic and
electrical systems").
Category C (Base Maintenance Certifying Engineer) : Basic C category license + Type Training (Line
& Base Maintenance i.a.w. Part-66 Appendix III, Level III for the first Type Rating and Part-66 Level I
training for subsequent Aircraft Types of similar technology, otherwise Level III training) + Company
Certification Authorization ("a category C aircraft maintenance licence shall permit the holder to issue
certificates of release to service following base maintenance on aircraft. The privileges apply to the
aircraft in its entirety in a Part-145 organisation").