AD 2012-01-01 77 FR 1626

We are adopting a new airworthiness directive (AD) for various aircraft equipped with Rotax Aircraft Engines 912 A series engine. This AD results from mandatory continuing airworthiness information (MCAI) issued by the aviation authority of another country to identify and correct an unsafe condition on an aviation product. The MCAI describes the unsafe condition as a deviation in the manufacturing process of certain part number 888164 crankshafts that may cause cracks on the surface of the crankshaft on the power take off side, which could lead to failure of the crankshaft support bearing and possibly result in an in-flight engine shutdown and forced landing. We are issuing this AD to require actions to address the unsafe condition on these products.