I'm pretty sure that the Chinook is still owned by
Columbia Helicopters. I note from the last PNG Aircraft Register that I received, that P2-CHI is owned by MBA Pty Ltd., but I suspect that it merely means operated by them.
I suspect that the Russian types are still used under the HeviLift AOC. Again according the same Aircraft Register, the KA32, P2-RAA is owned by HeviLift.
If there are still some Pumas here, they will be being operated by Pacific Helicopters. The register still shows 3 Pumas, being P2-PAY, P2-PAZ and P2-PHZ.
So I'm guessing that your real question relates to the accuracy of the Aircraft Register. I've been having my own problems getting an update and I work for the PNG CAA! Our Airworthiness folks have had many
MANY technical difficulties in producing a register in the last 12 months.
I remain hopeful, but am not holding my breath...