There is much comment in the aviation press. the P&W 4000 series engine is exclusive to the early 777-200 series and they are getting rather old.
The P&W 4000 dates back to 1986, there are thousands in use.
The 4000-112 engine is exclusive to the 777-200, it uses novel hollow compressor blades that are difficult to crack test. As they age the probability of cracks propagating into fractures seems to increase.
There 69 in-service and 59 in-storage Boeing 777 jets fitted with these engines, all have been grounded for further inspection and testing. It is likely that the FAA will require more frequent NDT once the engines reach a certain number of hours, which is likely to be uneconomical on 25+ year old aircraft: the 200s entered service in 1995/1996. Many operators of older 777s have already retired them.
Bottom line: don't worry.
