Construction unit for an engine of a plane

The assembly (25) has a combustion fuel pump of a combustion fuel cycle, and hydraulic fluid pumps (28 to 31) of a hydraulic fluid circulation system, where the assembly with an accessory gearbox shaft (39) is coupled to an accessory gearbox unit (9) of an engine. The combustion fuel pump and the hydraulic fluid pump are arranged in a common housing. The combustion fuel pumps has two parts, where one part is a low pressure combustion fuel pump (26) and another part is high pressure fuel pump (27), and are arranged on a common shaft of the assembly.