What happened
On January 25, 1966, a Piper J3C Cub, registration HB-OAE, was conducting a special VFR flight within the Jura sector of Geneva airport. The flight was being performed as part of a practical examination for the pilot to obtain a restricted radiotelephony license. While flying at a low altitude over a forested area near Crozet, France, the aircraft's engine ceased operation abruptly. Following the loss of power, the aircraft struck a fir tree and descended into the vegetation, eventually coming to rest in an upright position.
The investigation
The investigation reviewed information provided by the French Civil Aviation General Inspection. The inquiry focused on the circumstances surrounding the sudden loss of power and the subsequent impact with the terrain. The investigation established that the aircraft sustained approximately 65% destruction during the impact.
Findings
- The primary cause of the engine failure was likely carburetor icing.
- The aircraft was operating at a low altitude when the engine stopped.
- Despite the significant damage to the airframe, both occupants of the aircraft were able to exit the wreckage uninjured.