Special Conditions: Airbus Model A350-900 Series Airplane; Flight-Envelope Protection (Icing and Non-Icing Conditions); High-Incidence Protection and Alpha-Floor Systems

These special conditions are issued for Airbus Model A350-900 series airplanes. These airplanes will have novel or unusual design features, associated with flight-envelope protection in icing and non- icing conditions, that use low-speed incidence protection and an alpha- floor function that automatically advances throttles whenever the airplane angle of attack reaches a predetermined value. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for these design features. These special conditions contain the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.