Taken individually, these SMS deficiencies may not present a serious safety risk. However, when combined, as in the case of the QueenofSurrey, they resulted in a marked reduction in the effectiveness of administrative defences with respect to the initiation of the engine room fire, the failure of the CO 2 manifold and the evacuation of the passengers. ###>Individuellement, ces lacunes du système de gestion de la sécurité ne présentent pas un risque grave pour la sécurité.