Overview

The Civil Aviation Regulations 1998, as amended by the legislative instrument F2006B08455, were enacted to ensure the safety of civil aviation in Australia. This legislation aims to address potential safety risks associated with aircraft components, specifically targeting the General Electric Turbine Engines - CF6 Series. The problem it addresses relates to the durability and reliability of the high-pressure turbine rotor discs in CF6-50/-45 series engines, which can be compromised by cracks in the forward embossment inner diameter fillet. These cracks can originate from an undersized fillet radius, leading to potential engine failures. The policy objective, as outlined in the Federal Register of Legislative Instruments, is to mandate rework or inspection and rework of the specified turbine rotor discs to prevent such failures, thereby enhancing the overall safety of civil aviation operations in Australia. This directive is enacted by the Australian Government through the Civil Aviation Safety Authority, ensuring compliance with international safety standards and addressing identified safety gaps in engine maintenance.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 106, apply to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, which includes the requirements for General Electric Turbine Engines of the CF6 Series. These regulations are applicable to CF6-50/-45 series engines and mandate specific actions for maintaining airworthiness standards. The regulations require the rework or inspection and rework of stage 2 high pressure turbine rotor discs in compliance with the FAA AD 89-01-02 Amendment 39-6082, which addresses issues such as cracks found in a forward embossment inner diameter fillet that could compromise engine durability. The requirement to comply with these directives is immediate, with a specified cycle count starting from the effective date outlined in the Airworthiness Directive. This legislation ensures that the identified safety issues are promptly addressed, thereby maintaining the operational safety and reliability of the affected aircraft engines within the Commonwealth of Australia.

Key Provisions

The Civil Aviation Regulations 1998, particularly Part 39 - 106, which includes the Civil Aviation Safety Authority Schedule of Airworthiness Directives, mandates specific actions for maintaining the airworthiness of General Electric Turbine Engines of the CF6 series. One such directive, AD/CF6/11, pertains to the High Pressure Turbine Rotor Stage 2 Disc Forward Embossment Inner Diameter Fillet Radius. This directive applies to CF6-50/-45 series engines (section 3) and requires either the reworking or inspecting and reworking of the stage 2 high pressure turbine rotor discs as specified by FAA AD 89-01-02 Amendment 39-6082, in accordance with the detailed requirements of paragraphs (a) or (b), (c), and (d) of the directive. Compliance with this directive is mandatory and must be carried out forthwith, with the cycle count commencing from the effective date specified in the Airworthiness Directive. Under these regulations, operators of CF6-50/-45 series engines are obligated to ensure that the specified rework or inspection and rework of the high pressure turbine rotor discs are completed as required. This obligation encompasses the meticulous adherence to the FAA AD 89-01-02 Amendment 39-6082, which was issued to address the issue of cracks found in the forward embossment inner diameter fillet of the rotor discs. These cracks could potentially compromise the engine's durability, and the rework aims to rectify this by increasing the fillet radius to prevent future occurrences. Failure to comply with the provisions of AD/CF6/11 could result in significant legal consequences. Under the Civil Aviation Act 1988, non-compliance with airworthiness directives can lead to civil and criminal penalties. Civil penalties can include fines, and in severe cases, criminal charges may be pursued against individuals or entities responsible for the non-compliance. The exact penalties can vary based on the severity of the breach and the specific circumstances surrounding it. The Civil Aviation Regulations 1998, in conjunction with other relevant legislation, provide a framework for enforcing these penalties to ensure the highest standards of aviation safety are maintained. The regulatory framework is designed to protect the public and ensure the safety and reliability of aircraft operations. By enforcing stringent compliance with airworthiness directives such as AD/CF6/11, the Civil Aviation Safety Authority (CASA) aims to mitigate risks associated with engine failures and enhance the overall safety of civil aviation. The penalties for non-compliance serve as a deterrent and underscore the seriousness of adhering to mandated safety procedures. It is crucial for operators and maintenance personnel to stay informed about these regulations and ensure that all required actions are completed in a timely and effective manner.