DS3C model is applied to study single ionization of helium by 102eV electron impact. Fully differential cross sections are calculated at different scattering angles of θ1 (8°，10°，15°，20°) for the perpendicular plane geometry. The results of 3C and CCC model were compared with experimental data, which sho ws that DS3C model can give a successful description of the (e，2e) process for noncoplanar geometry qualitatively，indicating the existence of strong dynamic correlations effect between the three particles in the final channel for noncoplanar geometry.