The thesis is focused on Regulations requierements, on the whole certification process and on requirements of the Civil Aviation Authority on sailplane HpH 304 Sm with auxiliary engine Binder for start. The separate parts and the certification procedure in the whole are described. Main part of the thesis consists of check flight and suggestion of programme of check flight. Due to the fact that certification is an extensive process, this thesis tries to describe all important aspects of certification process, so it would create a view of plane certification process.