We’re still collecting data for this aircraft. Routes appear once we’ve seen it fly enough times.
The pilot's ostentatious display and in-flight decision to perform an abrupt low altitude pitch up maneuver (aerobatic flight). This resulted in the main rotor blades colliding with and separating the tail boom assembly while maneuvering, and the helicopters subsequent in-flight collision with terrain.
Mcdonnell Douglas HU-600N