COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Sikorsky S-76 Series Helicopters AD/S-76/16 Amdt 2 Main Rotor Blade Root End - Inspection for Fatigue Cracking 4/85 Applicability: All models fitted with main rotor blades P/N 76150-09000 or 76150-09100. Requirement: Sikorsky S76 Alert Customer Service Bulletin no. 76-65-18C. Compliance: As detailed in requirement document. Inspections carried out in accordance with the previous issue of this directive, meet the requirements of this issue. Background: The directive has been amended to nominate ACSB 76-65-18C as a more appropriate requirement document than the Composite Materials Manual. FAA AD 84-10-02 also refers to this subject.