But what of the piece of engine?
I have personally witnessed 2000lb bombs broaching on impact and landing over a mile from their original point of impact. A 1000 pound piece of engine landing a mile away from a 500 mph impacting aircraft just isn't that surprising. I had a buddy fly into the ground several years ago, and some hunters recovered his foot more than a mile away from his crash site several months later. It had been buried in the snow and was decently preserved. Crash sites and explosions are strange things. No two are the same, and none of them make sense to anyone who isn't an expert in the field.