The article discusses the strength of hydraulic control of the aircraft (GSUS) and its elements - the property of the system and its components to maintain integrity (no break) for all permissible operating conditions for a given resource, providing the required level of security and reliability requirements offlights. Recommendations are made to ensure the necessary strength of GSUS and its components based on the experience of security strength of aircraft systems and their elements, confirmed by the operation of the huge fleet.