Special Conditions: Bombardier Aerospace, Models BD-500-1A10 and BD-500-1A11; Limit Engine Torque Loads

These special conditions are issued for the Bombardier Aerospace Models BD-500-1A10 and BD-500-1A11 airplanes. These airplanes have novel or unusual design features as compared to the state of technology envisioned in the airworthiness standards for transport category airplanes. These design features include engine size and the potential torque loads imposed by sudden engine stoppage. 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.