A system for mounting aircraft system components in the crown area of an aircraft comprising a first longitudinal carrier element, a second longitudinal carrier element and a bridging element which connects the first longitudinal carrier element to the second longitudinal carrier element. The system is mountable in the crown area of an aircraft in such a way that the first and the second longitudinal carrier elements extend substantially parallel to the longitudinal axis of the aircraft. A plurality of cable ducts for accommodating electrical lines is provided on the first and/or the second longitudinal carrier elements.