Special Conditions: Boeing Model 737-900ER series airplanes; Interaction of Systems and Structures

This special condition is issued for the Boeing Model 737- 900ER airplane. This airplane will have a novel or unusual design feature(s) associated with the interaction of systems and structures. The applicable airworthiness regulations do not contain adequate or appropriate safety standards for this design feature. This special condition contains the additional safety standards that the Administrator considers necessary to establish a level of safety equivalent to that established by the existing airworthiness standards.