DESCRIZIONE
An inflatable device for aircraft buoyancy, configured to be inflated in case of emergency landing on water, the device comprising a first inflatable chamber (11;111) configured to be inflated from a source of gas (9), to change from a folded state to an inflated stated, a plurality of second inflatable chambers (21-24; 121-125), each configured to be supplied from gas flowing in the first chamber, via at least one supply passage (31-35), each second inflatable chamber configured to be inflated to change from a folded state to an inflated stated, wherein each supply passage (31-34) comprises a check valve (8).