Finschhafen?
There was a big American WWII strip at a place (now) called Nugidu (I think) near Maneba wharf. It had some bitumen still on it but was completely overgrown when I last saw it in 2000.
Well done Axel. It is Nugidu, the other airstrip in the Finschafen area, north of the Mape river and the Butaweng hospital complex. On the hill opposite the airstrip and the lagoon is a beautiful big house with a tower in the middle, called Malaoba. IŽll post a picture later.