Aircraft mechanics maintain, repair and overhaul aircraft structures, mechanical and hydraulic systems as well as electrical and electronic avionic instruments. They inspect aircraft and aircraft systems following manufacture, modification, maintenance, repair or overhaul. Aircraft Mechanics are employed by aircraft companies, maintenance, and overhaul establishments and by airlines and other aircraft operators and in industry in general.
Aircraft mechanics usually specialize in working on specific aircraft systems such as engines, engine accessories, airframes or hydraulic systems. Licenses are issued in the following categories: General Maintenance M - Aircraft Specialized Maintenance E - Avionics Systems S - Structures P - Propulsion Systems.