Special Conditions: Boeing Model 787-8 Airplane; Interaction of Systems and \nStructures, Electronic Flight Control System-Control Surface Awareness, High \nIntensity Radiated Fields (HIRF) Protection, Limit Engine Torque Loads for \nSudden Engine Stoppage, and Design Roll Maneuver Requirement

These amended special conditions are issued to the Boeing Model 787-8 airplane. This airplane will have novel or unusual design features when compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. These design features include limit engine torque loads for sudden engine stoppage. Special Conditions No. 25-354-SC was issued on July 18, 2007, addressing, in part, this condition. We have determined that more clarification is needed on the limit engine torque loads for sudden engine stoppage special conditions, and have therefore added a new requirement. This additional requirement has been applied, via special conditions, to other programs. Since applicable airworthiness regulations, including those contained in Special Conditions No. 25-354-SC, do not contain adequate or appropriate safety standards for this particular design feature, these amended special conditions contain the additional safety standards which the Administrator finds necessary to establish a level of safety equivalent to that established by the existing standards.