It has happened once again it sounded like!
According to Switzerland officials a helicopter hit a drone, the helicopter was able to make it back to its base.
“The incident occurred at about 1000 meters above sea level in the Verzasca Valley, as reported by the cantonal police of Ticino. The investigation showed that a propeller wing of the helicopter registered in Switzerland showed traces of a collision with a hard object”
The first know incident of a drone vs a helicopter was in the United States, when a UH60 “Blackhawk Helicopter” collided with a drone during a Presidential TFR. The NTSB found the Drone Pilot in fault for the incident, the drone caused a 1 1/2 inch dent on the leading edge of one of its main rotor blades. In addition, cracks in some composite fairing and window frame were observed.