From the radar tracks it looks like they didn't need to dump fuel, unless they did it over land. After the incident they turned due east to the coast, but before they were over the ocean they returned to near Mudgee where it happened and then tracked for a south approach to R34.
They landed shortly after 11.30 pm. I'm surprised they were allowed to land so long after the curfew, I mean what's the point in having a curfew if aircraft can bust it willy nilly any time they like just because an engine was underperforming? I can see this will open a can of worms, with airlines scheduling engine failures when approaching Sydney out of hours. Turn them back, like the boats I say. (you there Alan, c'mon, back me up here)