Special Conditions: Airbus Model A320 Airplanes; Child Restraint System

These amended special conditions are for Airbus Model A320 airplanes. These airplanes, as modified by AMSAFE Inc., will have the novel and unusual design feature of a child restraint system that attaches to the existing passenger lap belt. Special Conditions No. 25- 255-SC were issued for this novel and unusual design feature on December 8, 2003. These special conditions contained dynamic test requirements. AMSAFE subsequently applied to amend those special conditions so that the requirements would be applicable to and appropriate for the certification basis of the Airbus A320 airplane. The A320 type certification basis requires only static testing for seats. The applicable airworthiness regulations, including those contained in Special Conditions No. 25-255-SC, do not contain adequate or appropriate safety standards for this design feature. These special conditions contain the appropriate (i.e., static testing) safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards for the A320 airplanes.