NOD - Another very good point. The ABN section has loss of fire warning/protection as a crew awareness only item so no DIV or shutdown would be necessary or wise.
Boeingchap - A latch sensor would be a 'simple modification'. You're knowledge of the A319 design must be extensive to know that there is already a spare wiring set there to carry the data and electrically supply such a system without a very expensive rewire through the engine, into the pylon and then onto the avionics bay to connect to the SDAC. I assume you know that this is all in place/easy to install or do you not have a clue what you're talking about.