This U.S. industry comprises establishments primarily engaged in one or more of the following: (1) manufacturing aircraft engines and engine parts; (2) developing and making prototypes of aircraft engines and engine parts; (3) aircraft propulsion system conversion (i.e., major modifications to systems); and (4) aircraft propulsion systems overhaul and rebuilding (i.e., periodic restoration of aircraft propulsion system to original design specifications).

• Aircraft engine and engine parts (except carburetors, pistons, piston rings, valves) manufacturing
• Aircraft engine overhauling
• Aircraft engine rebuilding
• Aircraft turbines manufacturing
• Developing and producing prototypes for aircraft engines and engine parts
• Engines and engine parts, aircraft (except carburetors, pistons, piston rings, valves), manufacturing
• Gas turbines, aircraft, manufacturing
• Gasoline engine parts (except carburetors, pistons, piston rings, valves), aircraft, manufacturing
• Gasoline engines, aircraft, manufacturing
• Internal combustion engines, aircraft, manufacturing
• Jet propulsion and internal combustion engines and parts, aircraft, manufacturing
• Rocket engines, aircraft, manufacturing