COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell Helicopter Textron 412 Series Helicopters AD/BELL 412/30 Swashplate Support Assembly 4/92 TX Applicability: All model 412 helicopters if fitted with Swashplate Support Assembly P/N 412-010- 453-101. Requirement: Action in accordance with Bell Alert Service Bulletin 412-92-57 Rev A and 412-92- 58. Compliance: 1. For compliance with ASB 412-97-57 Rev A, Part I Daily after receipt of this Directive, and Part II Within 10 hours time in service after 10 February 1992; and 2. For compliance with ASB 412-92-58, before further flight after receipt of this directive. Background: The manufacturer has received reports of cracking in the stainless steel Swashplate Support Assembly.