After seeing better pictures, the fan turbine blades look fully intact but the cowling is completely ruined which seemingly points to a failure within the compressor and subsequent uncontained failure.
We can draw quite a few comparisons here to the AA 767-200 that burst into flames at LAX.
ASN Aircraft accident Boeing 767-223ER N330AA Los Angeles International Airport, CA (LAX)
It would be interesting if any recent engine related incidents related to surge, vibration etc had been reported on this aircraft.