Naive question: Although the broken fan blade may have been going at ballistic speeds and bounced off of the cowling before its final trajectory through an aft window,
Wouldn't the 500 knot forward speed of the aircraft have some/ a major influence on its being blown backwards midflight?
After all, if a skydiver leaves a plane, they get blown backwards as they are not as aerodynamically sleek as the plane itself nor under power, especially if the plane is going faster than their rate limiting speed in freefall.