in hangars or hangar decks, or outside on flight decks or flight lines at Air Stations. A high noise level is a normal part of their work environment. AMs work closely with others, do mostly physical work and require little supervision. AMs may also serve as flight engineers aboard certain aircraft. Requirements ASVAB score requirement: VE+AR+MK+AS = 210 OR VE+AR+MK+MC = 210 Security clearance requirement: None (except for those who volunteer for aircrew duty) Other requirements: Vision must be correctable to 20/20 Must have normal color perception Must have normal hearing No history of drug use. History Between 1948 and 2001, the AM Rating consisted of two additional Service Ratings: AM - Aviation Structural Mechanic AME - Aviation Structural Mechanic (Safety Equipment) AMH - Aviation Structural Mechanic (Hydraulics) AMS - Aviation Structural Mechanic (Structures) AMEs maintain and repair oxygen, cockpit and cabin pressurization, and ejection seat systems. The AMH was for hydraulic systems (landing gear, brakes, flight controls and all related). The AMS was structural/sheet metal. Today's AM Rating began from the aviation metalsmith used between 1921 and 1948. In 2001, the AMS and AMH Ratings were merged to form the AM Rating, the AME Rating remains a separate and distinct rating. References See also List of United States Navy ratings Mechanics (trade) United States Navy ratings