Far too many folks get carried away in the "need" to do something
SAS - I think FIRE comes under "need" to do something. Just aft of those skinny firewalls it is all "plastic" i.e. composite.
So is the TRDS between the engines at that point.
Carbon fibre doesn't really burn but the glue holding it together does.
Know a guy last year who had the PT wheel exit from the #2 Arrius1 on an AS355N. The TRDS let go just after touchdown after LAND IMMEDIATELY and that was AI. I think they made a mistake putting out the fire after safe touchdown.