Coverage depends on ground receiver reception and is not a complete picture of traffic.
The hex code is the aircraft's ICAO 24-bit address, broadcast by its ADS-B transponder. It is the key used to match live position reports to this registration.
The separation of the upper tail cone as a result of a fractured bolt due to fatigue.
The main rotor contact to the tail boom resulting from the pilot leaving the helicopter unattended while the rotors were engaged.
The pilot's inadequate preflight of the helicopter, and his subsequent failure to monitor his fuel supply, which resulted in a power loss due to fuel exhaustion, over unsuitable terrain.