Arrived early 1978 as I recall. Pilots were endorsed by David Wiltshire of TAA who oversaw the introduction.
NT got self Government that year so I think someone else took over the operation later. Possibly Air North.
Up to self government in 1978 the commonwealth health department funded the operation and TAA had the contract. TAA pilots and engineers were seconded to Darwin, Alice Springs and Gove.
After self government the NT government took it over.