Special Conditions: Airbus Model A350-900 Series Airplane; Airplane Level of Safety Provided by Composite Fuel-Tank Structure: Post-Crash Fire Survivability

These special conditions are issued for Airbus Model A350-900 series airplanes. These airplanes will have a novel or unusual design feature associated with the post-crash fire survivability of composite fuel tanks. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. 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.