AirLink's ATR 72 at Madang. They had icing problems, but they may have been fixed by the time AirLink got theirs.
May..?? Give it a break....like 20 years.. they were modified ages ago!
You will always get ice buildup in the Tropics when you go through a big wet Cu above about 15,000 or 16,000. The ATR is certified to 25,000. Would be surprised to see an ATR landing at any airport in PNG still carrying substantial ice after an encounter at altitude.