COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell Helicopter Textron Canada (BHTC) 206 and Agusta Bell 206 Series Helicopters AD/BELL 206/42 Amdt 2 Pylon Support Link P/N 206-031-508 - Inspection 4/73 Applicability: All models. Document: Bell SB No. 206-01-73-2, Rev. A. Note: Agusta SB No. BT206-59 dated April 2, 1973 refers. Compliance: As detailed in the requirement document. Background: AD/Agusta 206/30B equivalent.