Federal Aviation Administration March 16, 2011 – Federal Register Recent Federal Regulation Documents

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) originated by an aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as:

This notice proposes to amend Special Conditions No. 25-388-SC for the Boeing Model 747-8/-8F airplanes. These special conditions were previously issued July 29, 2009, and became effective September 10, 2009. These special conditions are being amended to include additional criteria addressing the Outboard Aileron Modal Suppression System. The 747-8/-8F 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 their effects on the structural performance. These proposed 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. Additional special conditions will be issued for other novel or unusual design features of the 747-8/-8F airplanes.