Fuel crossfeed and leak
Why are flight departments so paranoid about crossfeeding fuel in case of a confirmed leak from a tank? I understand very well that it is a bad idea to feed fuel from the good tank to the leaking side, that's a definite no go, but what about the other way around?
Say you are flying over the ocean a long way from any airfield, are you just going to watch a wing tank loose all its fuel or are you going to try to use as much of what is left by crossfeeding the remaining fuel from the leaking side to your engines? According to my 320 QRH this is not an option.
Any idea why? Again, it is obvious why you would not want to just open the crossfeed valve, but I don't understand why we are not allowed to actively crossfeed (switching off the pumps on the 'good' tank).