Données préliminaires issues de la notification des autorités de l'Espagne :
In cruise flight the aircraft began to experience strong vibrations. The pilot found that as the engine speed dropped, the vibrations decreased. He continued the flight until the destination, given it was possible to fly without vibrations at a speed somewhat lower than usual.
After landing it was found that 2 out of the 3 blades of the propeller of the aircraft were fissured.