Hi Guppy
Appreciates you sharing your insight in the fire fighting. Some questions though:
The fire suppression in the lower cargo is based on Halon. Halon works by starving the fire of oxygen. You mean that in most cases this will not be enough? Most wide body passenger jets today are certified with the Halon suppression as the means to stay alive for hours.
The main deck fire procedure is based on de-pressurising the aircraft, fly at 25000 feet and thus starve the fire from oxygen. At the same time the outflow valves will be open and one pack will operate. Don't you think this will draw the smoke to the rear of the aircraft?