COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 105 CIVIL AVIATION SAFETY AUTHORITY SCHEDULE OF AIRWORTHINESS DIRECTIVES Bell UH-1 Series Helicopters 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 CAR 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. AD/UH-1/12 Tail Rotor Driveshaft Hangar Bearings 8/2000 Applicability: Model UH1A, UH1B, UH1E, UH1F, UH1H, UH1L, UH1P, TH1F, and TH1L. Requirement: Action in accordance with the technical requirements of FAA AD 94-22-09. Compliance: Before further flight after the effective date of this directive. This Airworthiness Directive becomes effective on 10 August 2000. Background: Following the loss of a Bell model 412 it was discovered that certain batch/s of bearings had been contaminated during manufacture. This directive is issued to preclude any of those bearings re-entering service in an Australian helicopter. David Alan Villiers Delegate of the Civil Aviation Safety Authority 6 July 2000 The above AD is notified in the Commonwealth of Australia Gazette on 12 July 2000.