Everyone in the know, knows that Qantas has been over extruding the thronomeister in the RB211-411 engines for years. You do that during a wet start over 621 degrees EGT, and no wonder you throw a blade at 1.02 EPR. They have been doing it since the engine workshop lost its wooden floor!
Now THERE is a story ACA and CASA should follow up on.
DB