McDonnell Douglas MD 500 Defender
| MD 500 Defender | |
|---|---|
| Hughes 530MG, on display at PROLOG '85 | |
| General information | |
| Type | Light multi-role military helicopter | 
| National origin | United States | 
| Manufacturer | Hughes Helicopters McDonnell Douglas Helicopter Systems MD Helicopters | 
| Status | In service | 
| Primary users | Republic of Korea Army | 
| Number built | 471 | 
| History | |
| Manufactured | 1976–present | 
| First flight | 1976 | 
| Developed from | Hughes OH-6 Cayuse MD Helicopters MD 500 | 
The McDonnell Douglas Helicopter Systems MD 500 Defender is a light multi-role military helicopter based on the MD 500 light utility helicopter and OH-6 Cayuse Light Observation Helicopter.