De Havilland DHC-6 Twin Otter crash, Jul 20, 1988 (1 killed)
De Havilland DHC-6 Twin Otter accident on July 20, 1988 near Washington-Dulles, Virginia, USA, United States with 1 fatality.
- Date: July 20, 1988
- Aircraft: De Havilland DHC-6 Twin Otter
- Location: Washington-Dulles, Virginia, USA, United States
- Fatalities: 1