Page:Report of the Board of Inquiry into the Helderberg air disaster.djvu/106

101 gulshment certlllcation requirements and the relevant design ieatures of the aeroplane can be summarized as follows:

(1)

The 9 600 cubic feet main deck cargo compartment is separated from the passenger compartment by a partition fitted just forward of the side cargo door at body station (723. The 25 mm thick partition panels are constructed or Nomex honeycomb core and fibre glass face sheets. The partition is not an air tight seal between the two compartments. It is intended to provide a restriction that aids In air ﬂow directional control wlthin the aeroplane. Air is introduced into the compartments just below the ceiling levels, passes through the compartments and exits through sidewall grilles at ﬂoor level to move downward towards the rear to the two outflow valves located aft of the lower cargo hold. At the same time some air flows into the overhead space above the main deck passenger compartment and moves aft. During normal conditions the