Anybody able to pass the basic knowledge examinations and fulfil the basic experience requirements can get a Part-66 licence. There are no additional conditions such as a medical certificate or any other proof regarding the mental or physical abilities. In other words, people with specific learning difficulties or physical impairments are not discriminated by Part-66 or Part-147.
Obtaining the licence does not give the certification privileges. Before granting such privileges, the maintenance organisation will have first to check the competence, including the assessment of the skills and abilities and considering the Human Factors principles. The scope of the certification authorisation will be commensurate to these competence/abilities. Please note that in some EU Member States additional occupational safety and health requirements may apply (working on heights, confined spaces, etc.).
EASA does not plan to amend the regulations taking into account the cases of people with special needs during examinations: a single Regulation cannot cover all individual cases. This is why Basic Regulation (EU) No. 216/2008 includes the possibility for the Member States to apply Article 14.4 or 14.6 for exemption, after evaluation of these individual cases. To illustrate, such exemptions in the past have been positively instructed for candidates with confirmed dyslexia (i.e. 25% additional time).