swish266
Given the nature of the fire detection system, I have always assumed that the fire indications would remain even if the fire had extinguished. The detector heads are looking at particle presence rather than temperature and popping a couple of extinguishers into the hold (I would have thought) would have produced a fair amount of particle presence. The only methods I can think of for reassurance as to what is going on would be the hold temp indications and asking 'Doris' to take her shoes off and stand over the hold area!!
I don't know of any definitive info on this but that's, presumably, because it's not an area for easy experimentation.