COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES General Electric Turbine Engines - CT58 Series AD/CT58/13 Stage 1 Turbine Wheels 9/85 Applicability: All CT58 engine models fitted with P/No. 4002T17P02 Stage 1 turbine wheels with the following S/Nos: 7753, 7761, 7762, 7767, 7768, 7783, 7799, 7803, 7811, 7815, 7817, 7819, 7820, 7823, 7824, 7828, 7839, 7845 and 7846. Document: 1. General Electric SB (CT58) A72-159; or 2. FAA AD 81-02-02, Amendment 39-4004; or AD/GE-T/35A Compliance: As detailed in requirement document No. 1. Background: This Directive is raised in issue in order to add more Stage 1 turbine wheel S/Nos. to the affected listing and to reference the applicable FAA Airworthiness Directive.