Revised Discrete Gust Load Design Requirements

This amendment revises the gust load design requirements for transport category airplanes. This amendment replaces the current discrete gust requirement with a new requirement for a discrete tuned gust; modifies the method of establishing the design airspeed for maximum gust intensity; and provides for an operational rough air speed. These changes are made in order to provide a more rational basis of accounting for the aerodynamic and structural dynamic characteristics of the airplane. These changes also provide for harmonization of the discrete gust requirements with the Joint Aviation Requirements (JAR) of Europe as recently amended.