Federal Aviation Administration July 8, 2013 – Federal Register Recent Federal Regulation Documents
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Airworthiness Directives; Diamond Aircraft Industries GmbH Airplanes
We propose to adopt a new airworthiness directive (AD) for Diamond Aircraft Industries GmbH Models DA 42, DA 42 NG, and DA 42 M-NG airplanes. 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 insufficient clearance between the rod end safety washer and the nose landing gear attachment lever causes the rod end to bend at each gear retraction sequence. We are issuing this proposed AD to require actions to address the unsafe condition on these products.
Airworthiness Directives; Agusta S.p.A. (Type Certificate Currently Held by AgustaWestland S.p.A.) (Agusta) Helicopters
We propose to revise an existing airworthiness directive (AD) for the Agusta Model AB139 and AW139 helicopters. The existing AD currently requires inspecting the fuselage frame to detect fatigue cracks which could lead to structural failure and subsequent loss of control of the helicopter. Since we issued that AD, Agusta has developed a frame reinforcement modification which supports extending the interval for inspecting the fuselage frame for a fatigue crack. This proposed AD would require inspecting the fuselage frame for a crack, but would reduce the applicability from the existing AD to exclude helicopters modified by the optional frame reinforcement modification. The proposed actions are intended to detect a fatigue crack that could result in failure of the fuselage frame and subsequent loss of control of the helicopter.
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