N-reg freighters require an IRCD. The 763-F has no supernumerary compartment, the ****ter is in the cockpit as well. Most cargo flights have either a jump seater or supernumerary crew on board. It is a rare event that there are only 2 pilots in a freighter, the loss of life is minimal unless one could plan for a ground target. Think we need to quit being afraid of our own shadow yet a simple fix would be for a modification to allow ground crew to secure the IRCD open in the rare event of only 2 pilots alone in an aircraft.