Janner200
You may well be correct on its location, it doesn't look like early-stage compressor GV's and it isn't LPT size. That part coming off the engine is consistent with a high energy impact, such as with ET302, which exhibits similar levels of fragmentation. IF the failure was airborne, as an uncontained failure, for a 737 there is not that much of interest there to cause loss of control; an engine failure associated with ruptures of the cowling and even wing surface is not itself a control problem, even with a loss of hydraulics, the plane is quite flyable, however, a loss of both A & B system, along with a failure of the standby system with an engine failure will be challenging and may need a reduction to idle on the live engine to control, but it is extremely unlikely to occur with any uncontained turbine failure [not impossible...]..