Document ID: chunk:federal_register_of_legislation:F2006B06680:body:0
Version: federal_register_of_legislation:F2006B06680
Segment Type: other
Provision Reference: 
Character Range: 0–963

COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 - 106 CIVIL AVIATION SAFETY AUTHORITY
 SCHEDULE OF AIRWORTHINESS DIRECTIVES

 Rolls Royce Turbine Engines - Spey Series

AD/RRT-S/11 Steel Turbine Discs 13/92
 Applicability: Spey series engines as detailed in Rolls Royce Service Bulletin Sp72-1044. Requirement:               Action in accordance with the requirements of Rolls Royce Service Bulletin Sp
            72-1044.

            Compliance: Effective 10 December 1992: At next engine shop visit during which, either a low pressure turbine or a high pressure turbine overhaul is scheduled.

            Background:  This Directive requires steel turbine discs which have completed at least 40% of their published service life, to be inspected in accordance with the overhaul manual. The requirement addresses concern with evidence of low cycle fatigue cracks originating from corrosion pits in a number of Spey steel turbine discs.