Turbofan having a fan shaft supported by two bearings

The engine has a fan integrated with a drive shaft (5) that is supported by bearings (6, 7). The bearing (7) has an inner ring integrated with the shaft and outer ring fixed on a flange (18) of a fixed structure. A retaining disc (28) is mounted on an annular groove (27) of the shaft and cooperates with a stop disc (33) of the flange for axial retaining of the fan and a longitudinal sleeve (32) of the flange to form a support bearing.