We have written previously about the serious issues with the Rolls-Royce engines fitted to the Boeing 787.
This has caused severe issues for many airlines including Virgin Atlantic and British Airways. Virgin has been worse hit and has ended up leasing some ex-airberlin A330 aircraft which will operate out of Manchester.
The situation is getting worse. New regulations to be issued jointly by the EU and US this week are expected to say:
aircraft flying one variant of this engine must always be within 140 minutes of a suitable emergency runway – which is not always the case when, for example, crossing the Atlantic towards South America
the engines must undergo a full inspection – which means taking the aircraft out of service – after every 80 flights, compared to after every 200 flights at present
Bloomberg has more information here.