Commonwealth legislation

AD/CF6/21 - Eddy Current Inspection of High Pressure Turbine Thermal Shields

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Commonwealth

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legislative instrument

Plain English Summary

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This AD requires operators of GE CF6‑45 and CF6‑50 engines to perform eddy‑current inspections of high‑pressure turbine thermal shields per FAA AD 91‑15‑16 and GE Service Bulletin 72‑879 Rev 6 (effective 28 Nov 1991). It responds to cracked HPT stage‑one discs and aims to prevent uncontained engine failure; operators must schedule inspections and bear inspection, downtime, and repair costs.

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AD/CF6/21 - Eddy Current Inspection of High Pressure Turbine Thermal Shields

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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/CF6/21 Eddy Current Inspection of High Pressure

Turbine Thermal Shields

Applicability: CF6-45/-50 series engines.

11/91

Requirement: Action in accordance with the Technical Requirements of FAA AD 91-15-16, Amendment 39-7080.

Note: General Electric Service Bulletin 72-879 Revision 6 refers.

Compliance: As specified in the Requirement Document with an effective date of 28 November 1991.

Background: Four HPT stage one discs have been found cracked during inspection. The condition, if not corrected could result in uncontained engine failure.

Source text

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