Document ID: chunk:federal_register_of_legislation:F2006B08714:body:0:p2
Version: federal_register_of_legislation:F2006B08714
Segment Type: other
Provision Reference: 
Character Range: 2929–3820

Directive required a one time inspection and rework of all HP turbine blades was after an investigation found that a number of HP turbine disc rim failures since 1972, resulting in HP turbine disc release, was due to high stress levels in the HP turbine disc bucket groove due to blade vibration. This blade vibration can occur as a result of excessive gaps between blade shrouds and platforms. This amendment re-writes the requirements, in consideration of the German LBA AD, by introducing an initial inspection followed by repeat inspections in order to prevent further uncontained disc rim failures.

            The original issue of this Airworthiness Directive became effective on 10 September 1998.

 Jim Coyne
 Delegate of the Civil Aviation Safety Authority 22 August 2003

 The above AD is notified in the Commonwealth of Australia Gazette on 27 August 2003.