Assuming that the problem emerged inside the turbine/engine, it is not Airbus' problem or fault then. Carriers choose by themselves the company providing the engines, Airbus or Boeing have little if nothing to do with that. Responsibility for maintenance is handed over to the carrier the same moment the plane gets delivered and is accepted.
Quantas has a very good maintenance and security reputation.
At this early stage, conclusions would be premature, but so far it looks as if RR are the ones to blame. If so, Boeing will not feel joy over it at all, but check their own types who have been ordered for delivery with comparable RR engines.
The A380 circled and released fuel for over one hour to get inside the landing weight. This speaks for the situation having been assessed by the pilot as being stable and under control. If it were not that, they would not have dumped fuel, but dared to land with the heavier plane immediately.
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If you feel nuts, consult an expert.
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