COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Eurocopter SA341 and SA342 (Gazelle) Series Helicopters AD/GAZELLE/12 Tail Gearbox - Inspection and Modification 10/82 Applicability: All models SA-341 and SA-342. Document: Aerospatiale Gazelle SB No. 65.22. Compliance: In accordance with requirement document. Background: Cracking of attachment lugs is attributed to surface and edge defects occurring during manufacture.