Federal Aviation Administration March 31, 2010 – Federal Register Recent Federal Regulation Documents

This action proposes to modify the Norton Sound Low and Control 1234L Offshore Airspace Areas in Alaska. This action would lower the airspace floors to provide controlled airspace beyond 12 miles from the coast of the United States given that there is a requirement to provide Instrument Flight Rules (IFR) en route Air Traffic Control (ATC) services and within which the United States is applying domestic ATC procedures.

We propose to adopt a new airworthiness directive (AD) for the products listed above. This proposed AD results from mandatory continuing airworthiness information (MCAI) issued 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: The installation of TU250 CS boards, however, has resulted in a few occurrences of erratic engine behaviour, in the form of unexpected N1 variations and/or illumination of the ``GOV'' warning light. The conclusions from an investigation by Turbom[eacute]ca are that these malfunctions are due to a lapse of quality control in the varnishing process applied to the boards, and that only boards in a specific serial number range, as defined under ``Applicability'' and referred to below as the ``suspect batch,'' are affected.