I wonder if he suffered a concussion, maybe the hit on the head on the rough landing caused internal bleeding...Poor Guy, he sounded like he took it so well like no biggie and then he ends up dead.
Either way the autopsy should find cause of death...perhaps the rough landing was enuogh, I know being a flight gone wrong is actually very traumatic.
I liked billy, i thought he was cool. Its ashame he died at such a young age
come to think of it, the dude looked 30 years old not 50 lol. the mishap on the plane must have really messed him up.