Document ID: chunk:federal_register_of_legislation:F2006B07397:body:0
Version: federal_register_of_legislation:F2006B07397
Segment Type: other
Provision Reference: 
Character Range: 0–1118

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

 AlliedSignal (Garrett/AiResearch) Turbine Engines - TFE731 Series

AD/TFE731/14 First Stage L.P. Turbine Disc 9/88 TX

            Applicability: TFE 731-5 series engine with suspect first stage L.P. turbine disc whose serial numbers are identified in the Requirement document.

 Requirement: Remove from service affected first stage L.P. turbine discs in accordance with
            G.T.E.C. Alert SB TFE 731-A72-3371.

            Compliance: For discs with less than 750 operating cycles: Prior to exceeding 750 operating cycles.

            For discs with more than 750 operating cycles: Replace within 25 operating cycles after 27 June 1988.

            Background: This Directive is issued to reflect GTEC Alert SB TFE 731-A72-3371 which advises the recent in-flight shutdown caused by separation of 2 adjacent firtree posts and release of three turbine blades. Engineering investigation determined that discs had been manufactured from a suspect forging lot.