Did ABC Family release something saying that there would be a plane crash and/or someone would die in the plane crash? Or was it someone who had posted it on the ABC Family message boards?

If there was some type of official spoiler release by ABC Family, I'll gladly add the spoiler to the OP. But if it was just on the message boards, then I'm inclined to think it probably came from someone who saw it on IMDb and decided to repost it to the ABC Family boards.