I keep being reminded of that old saying about "nothing new in the world".
Zaphod's link leads us to the remark about "requiring constant monitoring",,etc,,etc.
How about daily inspections of the fan/compressor/inlet, LP turbine blade , EGV's, jet pipe areas..Don't all airlines do it ? The one that I work for certainly does.
I seem to remember an Airworthiness Notice [ AWN.12, Experience from Incidents ]which dealt with molybdenum di-sulphide contamination of hot section blades [i.e. splashing on too much Molykote during fan lubes] as being a likely cause.
I have to say though , an engine will normally be removed from the wing for replacement long before any of that type of degradation has time to manifest itself.
Most airline base/line guys will confirm this.