A helicopter rapidly descended before smashing into the ground and killing two occupants in the Snowy Mountains, crash investigators have found.
The Bell LongRanger chopper crashed on the afternoon of April 3 in the sparsely populated Kiandra Flats area of Kosciuszko National Park in NSW.
The 64-year-old woman and 75-year-old man from Sydney's northern suburbs on board were fatally injured by the impact.