The AD Rating
In 1921, the Aviation Rigger rating was established, and in 1926 the rating was officially changed to the Aviation Machinist's Mate rating.
Aviation Machinist's Mates are aircraft engine mechanics. They inspect, adjust, test, repair and overhaul aircraft engines and propellers. ADs also perform routine maintenance, prepare aircraft for flight and assist in handling aircraft on the ground.
Aviation Machinist's Mate (AD)
Aviation Machinist's Mates maintain aircraft engines and their related systems, including the induction, cooling, fuel, lubrication, compression, combustion, turbine, gas turbine compressor, exhaust, accessory gearbox, aircraft mounted accessory drive, propeller and bleed air systems. They preflight aircraft, and conduct periodic inspections and oil analysis on engines and engine-related systems.
ADs field-test and adjust engine and fuel system components, including fuel controls, pumps, valves and regulators, and they troubleshoot, repair, remove and replace engine, fuel and secondary power system and components. They preserve and de-preserve engines, engine accessories and components, and supervise and provide training to powerplant work centers.
Qualifications, Interests, and Working Environment
Aviation Machinist's Mate may be assigned to sea or shore duty any place in the world, so their working environment varies considerably. They may work in hangars or hangar decks, outside on flight decks or flight lines at air stations. They may work in clean or dirty areas, but they are almost always working in noisy environments.
They work closely with others, do mostly physical work and require little supervision. ADs also serve as flight engineers aboard certain aircraft. People in this rating should be able to express themselves clearly in speaking and writing. They should have no speech impediment, and they must pass hearing and color perception tests.
ADs need good memories and the ability to do repetitive tasks, perform detailed work and keep accurate records. Manual dexterity and teamwork are also vital. Vision must correct to 20/20. Must have full field of vision. Must have normal depth perception and color perception. AD ASVAB Test requirement.
Credit Recommendations
The American Council on Education recommends that 3 semester hour credits be awarded in the lower division baccalaureate's/associate's degree category in turbine engine theory. Credits may also be earned for other follow-on training ("C" school) throughout your career.