Conversation so far:
who dies in the plane crash in grey's anatomy season 8
Meredith Grey's sister Lexie Grey dies at the end of Season 8 of Grey's anatomy in a tragic plane crash.
how does lexie grey from grey's anatomy die
Lexie Grey is crushed under a piece of the plane.
does mark sloan from grey's anatomy die
Both Mark Sloan and Lexie Grey sustained fatal injuries during an aviation accident in the eighth-season finale of Grey's Anatomy.

Question: how
Self-contained rewrite: how does mark sloan from grey's anatomy die