I just found another thread about this on Bladesplapper. Sounds like it may have been a little more than just a hiccup.
Is the machine on the PNG register ? Seems to be a hell of a lot of foreign registered helicopters operating commercially at the moment in PNG, with low PNG experienced pilots in some of them especially in the highlands. I have heard of some horror stories of new comers lossing control in the hills, ala LTE, and people getting lost ! Maybe it's about time for the PNG CAA to review their requirements in relation to the use of foreign aircraft and pilots in PNG, in an effort to avoid another Ambua style disaster !