Airworthiness Directives; Ballonbau Wörner GmbH Balloons
We are adopting a new airworthiness directive (AD) for Ballonbau W[ouml]rner GmbH Models NL-280/STU, NL-380/STU, NL-510/STU, NL-640/STU, NL-840/STU, and NL-1000/STU balloons. This 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 current inspection intervals are no longer adequate to ensure timely detection of deterioration or damage. We are issuing this AD to require actions to address the unsafe condition on these products.