COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES McDonnell Douglas (Hughes) and Kawasaki 369 Series Helicopters AD/HU 369/89 Main Blade Root End 8/96 DM Applicability: Model 369, 369A, 369D, 369E, 369F, 369FF, 369H, 369HE, 369HM, 369HS, and 500N helicopters. Requirement: Inspect in accordance with Part I and Part II of McDonnell Douglas Helicopter Systems Service Information Notice HN-239, DN-188,EN-81, FN-67, or NN-008, as applicable. Note: FAA AD 96-10-09 Amdt 39-9615 refers. Compliance: For Part I: Unless the initial inspection has already been accomplished, within 10 hours time in service after 17 June 1996. For Part II: Within 100 hours time in service after 17 June 1996, thereafter at intervals not to exceed 100 hours time in service. Background: The FAA received a report of one accident in which a blade separated from the helicopter, as well as eight other reports of cracked blades. The actions specified in this Directive are intended to prevent failure of a blade and subsequent loss of control of the helicopter.