He was dead long before he fell.
Had to be.
He probably was, but back in 2002 a 24 year old managed to get from Havana to Montreal in the nose well of a Cubana DC-10. I don’t know how these people avoid hypoxia, but some of them do.
I think if he was alive he could have avoided falling out pretty easily (see my post upthread with the photo link) so he must have expired en route and then his body shifted around and ended up on top of the main gear wheel.