Food for thought,
According to this article
Qantas to change engines on two A380s two trent 900 engines are being replaced. VH-OQC was found with an abonormal oil leak.
And with that in mind, going to this article
, Oil Fire Suspected In Trent 1000 Failure | AVIATION WEEK, dated in September, it suggests that
However, industry sources say an oil fire broke out within the engine during high-power runs. The heating is believed to have ‘softened’ the intermediate pressure (IP) shaft which subsequently failed. The unconstrained IPT then reached an over-sped condition and ultimately disintegrated; parts thrown loose penetrated the casing.
Maybe a possible cause to the engine failure?