Commonwealth legislation

AD/CF6/7 - First Stage High Pressure Turbine Disc Embossment Radii

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

2/10 complexity

This AD requires owners/operators of specified GE CF6-80A/A2 and CF6-80A1/A3 engines to inspect first-stage high‑pressure turbine discs per GE Service Bulletin A72‑446 (and the referenced FAA AD). It responds to manufacturer reports that blemishes in the embossment radii can shorten disc life, making inspections mandatory and shifting inspection/repair costs and operational impact onto operators.

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AD/CF6/7 - First Stage High Pressure Turbine Disc Embossment Radii

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

SCHEDULE OF AIRWORTHINESS DIRECTIVES

View image in the official source General Electric Turbine Engines - CF6 Series

AD/CF6/7 First Stage High Pressure Turbine Disc Embossment Radii

Applicability: CF6-80A/A2, -80A1/A3 engines.

9/86

Requirement: Inspect first stage high pressure turbine discs in accordance with the requirements of General Electric SB (CF6-80A Series) A72-446.

Reference Document FAA AD 86-15-04 Amdt 39-5353.

Compliance: In accordance with the Requirement Document.

Background: This Directive has been issued to require inspection of certain first stage turbine discs for blemishes in the forward and aft embossment radii. The manufacturer advises blemishes in the embossment radii may affect the service life of the discs.

Source text

Sourced from the Federal Register of Legislation (legislation.gov.au), CC BY 4.0.