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 369/43 Main Rotor Blade Root Fitting Assemblies and Lead-Lag Assemblies - Inspection 2/80 Applicability: All model 369H with component S/Nos. as listed in the requirement document. Document: Hughes SIN No. HN-140. Compliance: Part 1 - Initial Inspection - within 25 hours time in service after 3 January 1980. Part 2 - Periodic Inspection - as detailed in requirement document. Background: Cracking of the main rotor hub lead-lag link attach lugs has been reported in service.