Commonwealth legislation

AD/CF6/18 - High Pressure Turbine Inspection and Improved Shroud Cooling

In ForceCTH

Jurisdiction

Commonwealth

Collection

legislative instrument

Plain English Summary

4/10 complexity

This instrument requires operators of specified General Electric CF6 engine models to follow the technical requirements of FAA AD 91‑05‑21—implementing a borescope inspection programme and fitting improved stage‑1 HPT cooling hardware—on the compliance timetable set with an effective date of 13 June 1991.

It was issued after an HPT failure that caused damage; it delegates technical detail to the FAA AD and imposes inspection, modification and associated cost and downtime obligations on affected operators.

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AD/CF6/18 - High Pressure Turbine Inspection and Improved Shroud Cooling

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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/CF6/18 High Pressure Turbine Inspection and Improved Shroud Cooling

Applicability: All model CF6-80C2, A5, B6, B6 F and DIF.

Requirement: Carry out the technical requirements of FAA AD 91-05-21 Amdt 39-6900.

6/91

Compliance: As detailed in Requirement Document with a revised effective date of 13 June 1991.

Background: The AD introduces a borescope inspection program to detect high pressure turbine (HPT) stage 1 shroud and blade distress. Also, it requires installation of improved HPT hardware which increases the cooling to the HPT stage 1 shroud. The AD is prompted by one HPT failure which resulted in aircraft damage.

Source text

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