Recovery crews flew to Fox Glacier at first light this morning and have completed drone surveys of the crash site.
Twenty-six crew members were helicoptered to the glacier, with twenty-three remaining after the drone team completed their work.
Transport Accident Investigation Commission (TAIC) spokesperson Peter Northcote says the drone footage will enable them to build a 3D model of the site.
It is understood recovery teams have reached the wreckage and will try to locate the victims and preserve any evidence.
TAIC has an investigator and engineer on site working with Alpine Cliff Rescue and police.
There is a no-fly zone around the scene.
Mr Northcote says the community and other commercial helicopter operators have been very keen to help.
Six tourists and the New Zealand pilot were killed when the flight crashed into the West Coast glacier on Saturday.
The bodies of three women and a man have been recovered but bad weather has delayed efforts to retrieve the remaining three bodies.
The victims have been named as Australians Leang Sovannmony, 27, and Josephine Gibson, 29, Britons Andrew Virco, 50, Katharine Walker, 51, Nigel Edwin Charlton, 66, and Cynthia Charlton, 70, and Kiwi pilot Mitchell Paul Gameren, 28, from Queenstown.
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