Industry: 3724—Aircraft Engines and Engine Parts
Establishments primarily engaged in manufacturing aircraft engines and engine parts. This industry also includes establishments owned by aircraft engine manufacturers and primarily engaged in research and development on aircraft engines and engine parts whether from enterprise funds or on a contract or fee basis. Also included are establishments engaged in repairing and rebuilding aircraft engines on a factory basis. Establishments primarily engaged in manufacturing guided missile and space vehicle propulsion units and parts are classified in Industry 3764; those manufacturing aircraft intake and exhaust valves and pistons are classified in Industry 3592; and those manufacturing aircraft internal combustion engine filters are classified in Industry 3714. Establishments primarily engaged in the repair of aircraft engines, except on a factory basis, are classified in Transportation, Industry 4581; and research and development on aircraft engines on a contract or fee basis by establishments not owned by aircraft engine manufacturers are classified in Services, Industry 8731.

Air scoops, aircraftJet assisted takeoff devices (JATO)
Aircraft engines and engine parts, internal combustion and jetLubricating systems, aircraft
Airfoils, aircraft enginePumps, aircraft engine
Cooling systems, aircraft engineResearch and development on aircraft engines and engine parts by the manufacturer
Engine heaters, aircraftRocket motors, aircraft
Engine mount parts, aircraftStarters, aircraft: nonelectric
Exhaust systems, aircraftTurbines, aircraft type
External power units, aircraft: for hand-inertia startersTurbo-superchargers, aircraft
Codes Titles Number of US Businesses
3724Aircraft Engines and Engine Parts871
372400Aircraft engines and engine parts697
37240000Aircraft engines and engine parts697
372499Aircraft engines and engine parts, nec174
37249901Air scoops, aircraft6
37249902Airfoils, aircraft engine7
37249903Cooling systems, aircraft engine6
37249904Engine heaters, aircraft3
37249905Engine mount parts, aircraft12
37249906Exhaust systems, aircraft4
37249907External power units, for hand inertia starters, aircraft2
37249908Jet assisted takeoff devices (JATO)4
37249909Lubricating systems, aircraft2
37249910Nonelectric starters, aircraft2
37249911Pumps, aircraft engine4
37249912Research and development on aircraft engines and parts72
37249913Rocket motors, aircraft9
37249914Starting vibrators, aircraft engine0
37249915Turbines, aircraft type29
37249916Turbo-superchargers, aircraft12