My speculative guess is Rolls Royce will be picking up the tab for the cost of leasing replacement aircraft as this is a known fault with early Trent 1000 engines
https://www.theguardian.com/business...t-entire-fleet Won't surprise me if AIR replace the fan blades on all their early model engines as two engine out events for a small airline running about 12 of these early model engines is a fairly significant statistical event.
Agree with you that GE engines for the Dreamliner have also been plagued with problems.
One wonders if they aren't trying to push fuel efficiency too far with these tech engines ?