Aviation Machinist's Mates (AD) maintain aircraft engines and their related systems, including the induction, cooling, fuel, oil, compression, combustion, turbine, gas turbine compressor, exhaust and propeller systems; preflight aircraft; conduct periodic inspections on engines and engine-related systems; field-test and adjust engine components, including fuel controls, pumps, valves and regulators; remove, repair and replace compressor and turbine blades and combustion chamber liners; preserve and depreserve engines, engine accessories and components; and supervise engine work centers.

Aviation Structural Mechanics (AM) maintain aircraft airframe and structural components flight surfaces and controls hydraulic and pneumatic control and actuating systems and mechanisms, landing gear systems, air conditioning, pressurization, visual improvement, oxygen and other utility systems, egress systems including seat and canopy ejection systems and components, fabricate and repair metallic and nonmetallic materials; perform aircraft daily, special, hourly, and conditional inspections, supervise operation of airframe work centers; maintain aircraft metallic and non-metallic structures including fuselages, fixed and moveable flight surfaces, tail booms, doors, panels, decks, empennages, and seats (except ejection seats); flight controls and related mechanisms; hydraulic power storage and distribution systems including main (primary and secondary), auxiliary (utility), and emergency systems; hydraulic actuating subsystems; landing gear systems including wheels and tires, brakes, and emergency systems; pneumatic power, storage and distribution systems; hoists and winches, wing and tail fold systems; launch and arresting gear systems; hydraulic component repair and test; and perform aircraft daily, special, hourly, and conditional inspections.

Aviation Ordnancemen (AO) receive, inspect, package, store, handle, and process for shipment: airborne weapons, air launched torpedoes, aerial mines, and ammunition; test, assemble, fuze, load, download, arm, and de-arm all airborne weapons, torpedoes, and mines for aircraft carriage; receive, inspect, store, load, and download sonobuoys; perform authorized maintenance on airborne weapons, aircraft guns, and targets; receive, inspect, inventory, configure, test, and maintain Armament Weapons Support Equipment (AWSE), Ordnance Handling Equipment (OHE), and materials handling equipment; test and maintain aircraft armament release and control systems; inspect and maintain conventional ordnance magazines and Ready Service Lockers (RSL); maintain and operate magazine sprinkler systems; maintain and operate aircraft carrier weapons elevators; perform preventative maintenance and inventory small arms weapons; manage accounting systems, rework of airborne weapons/systems/equipment, and conventional weapons qualification/certification programs, afloat and ashore; prepare, review, maintain, and inspect compliance with directives and reports applicable to Notice of Ammunition Reclassification (NAR), High Energy Radiation Hazards to Ordnance (HERO), Weapons Certification Program, and Explosive Handling Certification Program.