CG101/100 became unviable when Qantaslink began operating Cairns to Port Moresby return AM and PM services, effectively putting an extra 280 seats a day into the market.
It made sense to roll over on that route and concentrate on the domestic operation in PNG.
Then the company only ran the service on a Friday evening Pom to Cairns to bring staff home for the weekend and returned on Saturday mostly empty except for a few hapless crew a bit of freight and a few passengers. On Sunday evening it returned to Cairns in much the same fashion to operate back on a Monday morning with the managers and crew to operate out of Moresby. It was somewhat constrained by the departure having to be 0700 so crew could have the day previous as a day off.
This eventually was stopped-after 18 months- as it was considered more economical to fly all staff and crew on the Qantas and Pixie services. Also the PNG customs cracked the darks when they realised all the crew were being carried as deadhead crew on the general declaration, thereby avoiding the quite considerable taxes.
As one manager once said, "we've have never made money on that run anyway."
Right; sock draw sorted; undies now.
BTW FarCu I am not a KIWI, sheeez give a bloke a break. I'm not even a scientist and have never studied Physics for that matter.