Complex sentence: The impact spun 7628 to the right, causing the tails of both aircraft to collide at which time the left engine of 7628 struck the keel of 7880, and 7628's right wing was torn off.
Split into simpler sentences: The impact spun 7628 to the right, causing the tails of both aircraft to collide. The left engine of 7628 struck the keel of 7880, and it's right wing was torn off.