[1]Arxivat 2016-11-11 a Wayback Machine.[1] U.S. Department of Transportation Advisory Circular 43-204 Visual Inspection for Aircraft, 1997, pages 96-100
[1]Arxivat 2016-11-11 a Wayback Machine.[1] U.S. Department of Transportation Advisory Circular 43-204 Visual Inspection for Aircraft, 1997, pages 96-100