| 33641 |
Research and development establishments primarily engaged in aerospace R&D (except prototype production) are classified in Industry 54171, Research and Development in the Physical, Engineering, and Life Sciences |
| 33641 |
Establishments primarily engaged in manufacturing aircraft engine intake and exhaust valves, pistons, or engine filters are classified in Industry 33631, Motor Vehicle Gasoline Engine and Engine Parts Manufacturing |
| 33641 |
Establishments primarily engaged in manufacturing aircraft seating are classified in Industry 33636, Motor Vehicle Seating and Interior Trim Manufacturing |
| 33641 |
Establishments primarily engaged in manufacturing aeronautical, navigational, and guidance systems and instruments are classified in Industry 33451, Navigational, Measuring, Electromedical, and Control Instruments Manufacturing |
| 33641 |
Establishment primarily engaged in manufacturing aircraft engine electrical (aeronautical electrical) equipment or aircraft lighting fixtures are classified in Industry 33632, Motor Vehicle Electrical and Electronic Equipment Manufacturing |
| 33641 |
Establishments primarily engaged in manufacturing aircraft fluid power subassemblies are classified in Industry 33291, Metal Valve Manufacturing. |
| 336411 |
Establishments primarily engaged in manufacturing guided missiles and space vehicles are classified in U.S. Industry 336414, Guided Missile and Space Vehicle Manufacturing |
| 336411 |
Establishments primarily engaged in manufacturing flight simulators are classified in Industry 333310, Commercial and Service Industry Machinery Manufacturing |
| 336411 |
Establishments primarily engaged in the repair of aircraft (except overhauling, conversion, and rebuilding) are classified in Industry 488190, Other Support Activities for Air Transportation |
| 336411 |
Research and development establishments primarily engaged in aircraft R&D (except prototype production) are classified in U.S. Industry 541715, Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology). |