As it happened to go 'bang' I think you may find the failure is further forward than the LPT
not necessarily true, when the LPT goes, the High compressor still runs, but with a screwed up pressure flow comming into it from a dying LPC. One would have to know what happens to the vane scheduling and surge margin in that case to decide if the bang was primary or late to the LPT.
Really tough to take out a hundred pounds of LPT vanes etc. with an upstream failure in these modern machines.