Aircraft having: - at least one transport pipe (112a-b) in which dihydrogen flows, - for each transport pipe (112a-b), an embedding channel (200a-b) Characterized in that the embedding channel (200a-b) has a gutter that has a bottom, an opening opposite the bottom, and a perforated intermediate floor between the bottom and the opening that separates the gutter into an upper gutter in which the transport pipe (112a-b) is fastened and a lower gutter, the aircraft having also: - an aeration system having an aeration aperture arranged to collect air outside the aircraft and at least one supply pipe wherein each one opens at said air inlet via a window, - detection means distributed in each embedding channel (200a-b) and arranged to detect the presence of dihydrogen, - for one or more lower gutters, a bypass box having: - for the or each of said lower gutters, an inlet fluidically connected to the supply pipe and an outlet fluidically connected to said lower gutter, wherein the inlet and the outlet are fluidically connected to one another by a duct, wherein the inlet is different for each lower gutter, - between each associated inlet and outlet, a door able to move alternately between an open position in which the air is free to circulate between the inlet and the outlet and a closed position in which the air is blocked between the inlet and the outlet, and - for each door, a manoeuvring system arranged to move said door alternately from the open position to the closed position, and - a control unit arranged to receive information from the detection means and control each manoeuvring system on the basis of said information. - at least one transport pipe (112a-b) in which dihydrogen flows, - for each transport pipe (112a-b), an embedding channel (200a-b) Characterized in that the embedding channel (200a-b) has a gutter that has a bottom, an opening opposite the bottom, and a perforated intermediate floor between the bottom and the opening that separates the gutter into an upper gutter in which the transport pipe (112a-b) is fastened and a lower gutter, the aircraft having also: - an aeration system having an aeration aperture arranged to collect air outside the aircraft and at least one supply pipe wherein each one opens at said air inlet via a window, - detection means distributed in each embedding channel (200a-b) and arranged to detect the presence of dihydrogen, - for one or more lower gutters, a bypass box having: - for the or each of said lower gutters, an inlet fluidically connected to the supply pipe and an outlet fluidically connected to said lower gutter, wherein the inlet and the outlet are fluidically connected to one another by a duct, wherein the inlet is different for each lower gutter, - between each associated inlet and outlet, a door able to move alternately between an open position in which the air is free to circulate between the inlet and the outlet and a closed position in which the air is blocked between the inlet and the outlet, and - for each door, a manoeuvring system arranged to move said door alternately from the open position to the closed position, and - a control unit arranged to receive information from the detection means and control each manoeuvring system on the basis of said information. - an aeration system having an aeration aperture arranged to collect air outside the aircraft and at least one supply pipe wherein each one opens at said air inlet via a window, - detection means distributed in each embedding channel (200a-b) and arranged to detect the presence of dihydrogen, - for one or more lower gutters, a bypass box having: - for the or each of said lower gutters, an inlet fluidically connected to the supply pipe and an outlet fluidically connected to said lower gutter, wherein the inlet and the outlet are fluidically connected to one another by a duct, wherein the inlet is different for each lower gutter, - between each associated inlet and outlet, a door able to move alternately between an open position in which the air is free to circulate between the inlet and the outlet and a closed position in which the air is blocked between the inlet and the outlet, and - for each door, a manoeuvring system arranged to move said door alternately from the open position to the closed position, and - a control unit arranged to receive information from the detection means and control each manoeuvring system on the basis of said information.