That Motor Case is Done, sorry to hear that R, make damn sure you check the Tail Output shaft , Tail Spindle, thrust bearings in the tail as well as the Tail Box Bearings (All 4) . I have seen and experienced that before. Tail blades are for the most part intact, but still all the above listed could be bent or compromised in some way... And of course you know to check everything else.
BR ,
K