Summary
We propose to adopt a new airworthiness directive (AD) for Diamond Aircraft Industries GmbH Models DA40 and DA40F airplanes that would supersede AD 2013-24-14, which resulted 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 the fatigue strength found in the aft main spar not ensuring unlimited lifetime structural integrity. We are issuing this proposed AD to require actions to address the unsafe condition on these products and to change the compliance time to coincide with other regulatory requirements.