AIRWORTHINESS DIRECTIVE For the reasons set out in the background section, the CASA delegate whose signature appears below issues the following Airworthiness Directive (AD) under subregulation 39.1 (1) of CASR 1998. The AD requires that the action set out in the requirement section (being action that the delegate considers necessary to correct the unsafe condition) be taken in relation to the aircraft or aeronautical product mentioned in the applicability section: (a) in the circumstances mentioned in the requirement section; and (b) in accordance with the instructions set out in the requirement section; and (c) at the time mentioned in the compliance section. General Electric Turbine Engines - CT58 Series AD/CT58/17 Starter Driveshaft Bearing 7/2004 Applicability: Models CT58-100-1, -100-2, -110-1 Engines; Model CT58-140-1 Engines Serial Numbers (SN's) 295001 through 295018; Model T58-GE-1 Engines; and Model T58- GE-5 Engines, SN's 285001 through 285016 Requirement: On installations that incorporate General Electric starter Model 2CM270D3 or 2CM270D5, install front frame accessory drive pinion bearing, P/N 4002T03 (Vendor P/N HDB003-9), and modify starter by incorporating a new field winding assembly, P/N 36A227553G01 or 36A227554G01. Stamp a "B" on the starter nameplate after the starter model number on starters, Model 2CM270D3, and a "C" on the nameplate after the starter model number on starters, Model 2CM270D5, to indicate the field winding assembly has been changed. (Starter Models 2CM270D3B and 2CM270D5C have been modified at the factory.) On installations which incorporate starters other than General Electric Model 2CM270D3 or 2CM270D5, install front frame accessory drive pinion bearing, P/N 4002T03D03 (Vendor P/N HDB003-9). Note: FAA AD 64-26-02 Amdt 39-3 refers. Compliance: Unless previously accomplished within 14 days after the effective date of this AD. This Airworthiness Directive becomes effective on 8 July 2004. Background: Failure of the starter drive shaft bearing can result in engine power loss. This Directive calls for modification of the starter drive shaft bearing to prevent the unsafe condition from occurring. General Electric Turbine Engines - CT58 Series AD/CT58/17 (continued) The referenced FAA Directive also featured other inspections to be carried out. Due to the carriage of time those inspections are no longer applicable. The only course of action left is replacement of the parts as detailed in this Directive. James Coyne Delegate of the Civil Aviation Safety Authority 27 May 2004 The above AD is notified in the Commonwealth of Australia Gazette on 16 June 2004.