Hevilift Mil8
Definitely Mil-8 (Mi17-1 - sem-sem helikopta). Hevilift operate two of them, and at the moment I think they are both operating on the PK register based in Timika (Freeport).
I know they have been trying to get them on the P2 register (were being operated on a Foreign AOC in PNG), but PNG CAA have been stuffing them around.