Originally Posted by
mommus
Assuming this is a failure of the cowl, and not the fan, who's responsibility is it?
RR don't build the nacelle - or do they?
It doesn't matter who built any part of the engine, RR is the supplier and is responsible for any design or production defect.
Of course, the problem could have been caused by a maintenance error, so the Australian Transport Safety Bureau will be checking this out.