Perfect, thanks chaps.
While we're on the subject of fire protection - according to the FCOM the cargo compartment fire protection system is a 'dual loop' system.
Does 'dual loop' mean that the forward and aft cargo compartments EACH have two detector loops, or that there are two detector loops spanning BOTH compartments?
I'd guess by the layout of the cargo fire panel that each compartment has two loops, but the FCOM schematic isn't particularly clear.