Abstract: A hatch for closing an opening provided through an aircraft structure, related structure and method are provided. The hatch includes an inner sealing partition, intended to be mounted sealably on an aircraft structure and a locking assembly releasable from the inner partition on the structure. The hatch includes a valve for balancing pressure between an inner surface of the inner partition intended to be placed in an inner volume of the aircraft and an outer surface of the inner partition, intended to communicate with the outside of the aircraft. The valve is movable by a user between a closed sealing position and an open pressure balancing position. The releasable locking assembly is immobilized in its locking configuration when the valve is its closed sealing position.

Abstract: A system for dropping a package from an aircraft, a related aircraft and a method are provided. The system includes a panel configured to form part of a skin of the aircraft, the panel defining a through opening emerging outside the aircraft; a removable hatch and a sleeve guiding the hatch through the panel. The guide sleeve defines the through opening. The hatch is configured to be maneuvered in the guide sleeve between a configuration closing the through opening and a configuration allowing the package to pass through the through opening.

Abstract: A system for dropping a package from an aircraft, a related aircraft and a method are provided. The system includes a panel configured to form part of a skin of the aircraft, the panel defining a through opening emerging outside the aircraft; a removable hatch and a sleeve guiding the hatch through the panel. The guide sleeve defines the through opening. The hatch is configured to be maneuvered in the guide sleeve between a configuration closing the through opening and a configuration allowing the package to pass through the through opening.

Abstract: A hatch for closing an opening provided through an aircraft structure, related structure and method are provided. The hatch includes an inner sealing partition, intended to be mounted sealably on an aircraft structure and a locking assembly releasable from the inner partition on the structure. The hatch includes a valve for balancing pressure between an inner surface of the inner partition intended to be placed in an inner volume of the aircraft and an outer surface of the inner partition, intended to communicate with the outside of the aircraft. The valve is movable by a user between a closed sealing position and an open pressure balancing position. The releasable locking assembly is immobilized in its locking configuration when the valve is its closed sealing position.