Oil where oil shouldn't be
The report from Qantas that they've found "oil where oil shouldn't be" is an interesting outcome. I'm sure RR will love to take a close look at those engines. It will also be interesting to see if Singapore and Lufthansa re-inspect their engines for this specific issue. While they have "inspected" their engines, that does not mean they have inspected for this particular problem.
Of course it might be something specific to the Trent 972 or to something in Qantas operations that accentuate a vulnerability in the engine. But without knowing the specifics of Singapore & Lufthansa's inspections, I would hope the current push is to ensure the airworthiness of the whole engine family (970 & 972) - especially given Singapore & Lufthansa's quick return to flight.