De Havilland DHC-3 Otter crash, Aug 20, 1964 (2 killed)
De Havilland DHC-3 Otter accident on August 20, 1964 near Rioja San Martín, Peru with 2 fatalities.
- Date: August 20, 1964
- Aircraft: De Havilland DHC-3 Otter
- Location: Rioja San Martín, Peru
- Fatalities: 2
- Phase of flight: En route
The US Army Otter was searching for a missing Peruvian Air Force Alouette helicopter when it flew low and struck a tree on a jungle covered hill near Rioja. Both pilots were killed.