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 369/21 Stabiliser Strut Damper Plunger - Inspection and Replacement 12/76 Applicability: All models fitted with P/N 369A2001-601 shock mounted stabiliser strut assembly. Document: 1. Hughes SIN HN-102.1; or 2. FAA AD 76-19-03. Compliance: For Part 1 - Within 25 hours time in service after 25 Nov. 1976. For Part 2 (if required) - Within 100 hours time in service after 25 Nov. 1976.