Well, I am glad to see that after that excursion into oil related items we have come back to technical questions. Oil supply, that is my strongest believe, has never been a problem in this engine failure. The monitoring readings published by ATSB clearly show that there was sufficient / normal oil pressure on the feeds untill the very last seconds of the usable life of that engine.
So now the question should concentrate on what has, respectively what will RR change to make these Trents as healthy as planned ?? A lot of approaches to the problems identified in this thread are thinkable, to start from cheap to expensive:
usage of sturdier oil feed tubes? re-desighn of bearingchamber and use of stronger bearings ? re-desighn of supporting structures ? re-desighn of shafts ? or the finite decision, a re- desighn of the entire core engine ?
Would be interesting to read if anywhere a leak has opened in that wall of silence RR is hiding behind ?
I think the basics of that engine are delicate and the craftsmenship with which the modules are assembled and put together are out of doubts. So what is left ?? A real engineering fault ? Or just a too early stop in development and testing, ordered by the beanscounters ?? Anyway, as it looks something very substantial must have slipped through the controlling systems! Probably just an internal communications break / interruption ?? Probably a set of wrong priorities ?? Looking foreward to more and substantial information!!
Jo