De Havilland DH.4 crash, Jul 21, 1919, Hellertown Pennsyl...
De Havilland DH.4 accident on July 21, 1919 near Hellertown Pennsylvania, United States with no fatalities.
- Date: July 21, 1919
- Aircraft: De Havilland DH.4
- Location: Hellertown Pennsylvania, United States
- Fatalities: 0
- Phase of flight: En route