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-76/3 Amdt 1 Engine Air Inlet Cowl and Aft Cowl Assemblies - Modification 6/80 Applicability: All model S-76 with S/Nos. 76005 to 76007, 760001 to 760037. Documents: 1. Sikorsky SB 76-53-10; 2. Sikorsky Drawings 76070-30001 and 76080-30007; 3. Sikorsky EO 83184 against Drawing 76303-07001; EO 83185 against Drawing 76302-07001; and EO 83189, EO 83190 and EO 83191 against Drawing 76080- 30006; or 4. FAA AD 80-02-10, Amendment 39-3717. Compliance: Unless already accomplished, within 100 hours time in service after 30 June 1980. Background: This Directive is varied to prevent structural failures of the engine air inlet cowl doors and in-flight opening of their attaching latch handles.