The main purpose of licensing is to establish the accountability of a professional in an area. This study
focus on the role of licensed engineers involved in aviation. The licensing of aircraft maintenance
engineers is a mandatory requirement in the contracting states of the International Civil Aviation
Organisation. This paper compares the licensing systems of various countries and looks at differences in
the licensing standards that affect their acceptance by another contracting state. It looks at the degree to
which non-safety considerations, such as protecting trade and generating additional fees, can affect these
decisions. Although most contracting states follow International Civil Aviation Organisation standards for
licensing, some dilution in relation to the privileges of aircraft maintenance license has been noticed
in the European Aviation Safety Agency system. This paper also looks at the value of category C license in
the Agency system