here is what happend the fuel mixture C stoph and T stoph were a highly flamible mix when the touched, just a small portion of the fuels they would catch fire in a drastic way. so, when a large fuel load caught fire and explode.
My only thing is that we have somthing called "You have landed sucsessfully" when your on runway for startup, so we wouldn't lose perks and then we would just go again.