66.A.20 Privileges
(a) Subject to compliance with paragraph (b), the following privileges shall apply:
1. 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.
In my understanding of the regulation above, a CAT A can issue an "Aircraft" Certificate of Release to Service i.e sign the aircraft tech log after performing task like replacement of windscreen wiper blades on a B747-400 as long as the person has been trained for such task and he is authorised for such task without the need of getting type rated on the aircraft. Please correct me if im wrong.