List of accidents and incidents involving commercial aircraft 1919 – 1959
April 7 – In the first mid-air collision of airliners, a de Havilland DH.18A, G-EAWO, operated by Daimler Hire Ltd., collides with a Farman F.60 Goliath, F-GEAD, operated by Compagnie des Grands Express Aériens (CGEA), over the Thieulloy-St. Antoine road near Picardie, France, killing all seven people on both aircraft.