Avro 521 prototype crash, Sep 21, 1916 (1 killed), Upavon
Avro 521 prototype accident on September 21, 1916 near Upavon, United Kingdom with 1 fatality.
- Date: September 21, 1916
- Aircraft: Avro 521 prototype
- Location: Upavon, United Kingdom
- Fatalities: 1
The Avro 521 prototype with serial 1811 crashed at Upavon and one person was killed. The accident happened on 21 September 1916.