Authorities are still to determine what caused a Large Air Tanker to crash in southern New South Wales last week.

The US crew including Captain Ian McBeth, First Officer Paul Hudson and Flight Engineer Rick DeMorgan Junior were killed.

Their C-130 went down while fighting a blaze north-east of Cooma.

Authorities are still working to return their bodies to the US.

Here’s what the CEO of Coulson Aviation, Wayne Coulson, has to say about the investigation.

Image: Supplied/Coulson Aviation

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