Supply system (250, 350, 450, 550) for an aircraft, having a first and a second dihydrogen tank (110a-b) and an engine, the said supply system (250, 350, 450, 550) having: - a supply module (249, 349, 449, 549) having a first outlet pipe, a second outlet pipe, a first feed pipe fitted with a first main pump and intended to be fluidically connected to the first tank, a second supply pipe fitted with a second main pump and intended to be fluidically connected to the second tank, and means designed to channel the dihydrogen in the first and second feed pipes (251a-b) alternatively towards the first outlet pipe or the second outlet pipe or both, - a first heater, - a second heater, - a distribution module (248, 348) having a first introduction pipe fluidically connected to the first outlet pipe via the first heater, a second introduction pipe fluidically connected to the second outlet pipe via the second heater, a first distribution pipe and a second distribution pipe that are intended to be fluidically connected to the engine, and means for channelling the dihydrogen in the first and second introduction pipes (255a-b) alternatively towards the first distribution pipe or the second distribution pipe or both, - detection means intended to detect an incident in the supply module (249, 349, 449, 549) and/or the distribution module (248, 348) and/or the first and second heaters (152, 154), and to provide information representative of the said incident that was detected, and - a control unit designed to command the means of the supply module (249, 349, 449, 549) and/or the means of the distribution module (248, 348) depending on the information provided by the detection means. - a supply module (249, 349, 449, 549) having a first outlet pipe, a second outlet pipe, a first feed pipe fitted with a first main pump and intended to be fluidically connected to the first tank, a second supply pipe fitted with a second main pump and intended to be fluidically connected to the second tank, and means designed to channel the dihydrogen in the first and second feed pipes (251a-b) alternatively towards the first outlet pipe or the second outlet pipe or both, - a first heater, - a second heater, - a distribution module (248, 348) having a first introduction pipe fluidically connected to the first outlet pipe via the first heater, a second introduction pipe fluidically connected to the second outlet pipe via the second heater, a first distribution pipe and a second distribution pipe that are intended to be fluidically connected to the engine, and means for channelling the dihydrogen in the first and second introduction pipes (255a-b) alternatively towards the first distribution pipe or the second distribution pipe or both, - detection means intended to detect an incident in the supply module (249, 349, 449, 549) and/or the distribution module (248, 348) and/or the first and second heaters (152, 154), and to provide information representative of the said incident that was detected, and - a control unit designed to command the means of the supply module (249, 349, 449, 549) and/or the means of the distribution module (248, 348) depending on the information provided by the detection means.