The series of still photographs taken from surveillance camera video shows the fuselage, containing the engine and rotors, separating from the helicopter’s tail. The rotor blades and the transmission then detach from the cabin that’s carrying the passengers and the pilot.

Surveillance video showed the helicopter traveling South before it suddenly broke apart into three major sections; its fuselage, which held the pilot and passengers, the main rotor system and the tail boom including the tail rotor, the report said.

The helicopter that crashed in the Hudson River and killed six people in April “suddenly separated into three major sections, a preliminary report from the National Transportation Safety Board said Wednesday.