What happened
On June 21, 1964, a Piper Cub J3C, registration HB-OEF, was involved in a ground incident at the Basel-Mulhouse Airport. While taxiing, the aircraft veered off a taxiway, approximately 120 meters behind a Douglas DC-4 (registration G-ASFY) that was operating with its engines running. The excursion caused some damage to the Piper Cub J3C.
The investigation
The investigation was based on an initial report prepared by the Deputy Commander of the Basel-Mulhouse Airport on June 25, 1964. The commission reviewed the findings regarding the aircraft's movement relative to the stationary/running DC-4 and the resulting contact or proximity issues that led to the taxiway departure.