First it was battery overheating that ended up grounding the entire 787 fleet. Now it is major engine problems that is causing airlines major concerns. It's so bad that Japan's ANA is replacing its 50-strong fleet with 100 new engines.

The problem seems to be in cracking and early corrosion in engine turbine blades. This has led to ANA grounding 4 of the aircraft and cancelling 18 domestic flights due to engine problems. The worry for the airline - and for passengers - must be that the engine maker Rolls Royce will not have a new blade design ready until the end of this year. It will then take three years to refit the entire fleet.

With 445 planes already delivered, does this mean that other operators have been experiencing similar failures?

Newly designed Rolls Royce engines for new aircraft have sometimes experienced flaws requiring eventual redesign. It happened with the 747 and it was an RR engine which exploded on an A380 soon after take-off from Singapore in 2010 resulting in the loss of many controls. Only the skills of the pilots enabled it to land safely even at a very fast speed.

https://www.theguardian.com/business...t-entire-fleet