AD/CF6/27 - High Pressure Turbine Thermal Shield Inspection

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, were introduced to ensure the safety and efficiency of civil aviation within Australia. The Civil Aviation Regulations 1998 encompass a wide array of safety standards, operational requirements, and compliance measures designed to uphold the highest standards of aviation safety. One specific area addressed in this legislation is the regulation of airworthiness directives, such as the AD/CF6/27 which pertains to the inspection of General Electric Turbine Engines, specifically the CF6 series. This directive was introduced to address the identified problem of high-pressure turbine (HPT) thermal shield separations, which could lead to uncontained engine failure, posing a significant safety risk to aircraft and those on board. The policy objective of such regulations is to mitigate these risks through specified technical requirements and compliance measures, ensuring the ongoing airworthiness of the affected aircraft engines.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, pertains to the Airworthiness Directives and applies to aircraft operators, maintenance personnel, and entities engaged in the operation of civil aircraft within the Commonwealth of Australia. This legislative instrument mandates compliance with specific safety directives, including those issued by the Federal Aviation Administration (FAA) for General Electric Turbine Engines of the CF6 series, particularly models CF6-45, -50, -80A, and -80C2. These directives are necessary to ensure the continued airworthiness of the engines, specifically addressing the risk of High Pressure Turbine (HPT) thermal shield separation, which could lead to uncontained engine failure. The regulations require adherence to the technical requirements outlined in FAA AD 93-14-18, as well as referenced General Electric Service Bulletins. The directive's applicability is nationwide, ensuring uniform safety standards across all jurisdictions within Australia. Compliance with these directives must be achieved within the specified timeframes as mandated by the FAA, with effectivity commencing from 11 November 1993.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, specifically within Part 39 - 106 concerning the Civil Aviation Safety Authority Schedule of Airworthiness Directives, are crucial for ensuring the safety of turbine engines like the General Electric CF6 series. The specific section AD/CF6/27 mandates that the high pressure turbine thermal shield of the CF6-45, -50, -80A and -80C2 series engines must be inspected according to the technical requirements of FAA AD 93-14-18 (Section 1). This directive references General Electric Service Bulletins 72-1021, -596, and -565 for additional technical guidance and compliance must be achieved in accordance with these specifications, with an effective date starting from 11 November 1993 (Section 2). The obligations imposed by these regulations on the parties involved, such as aircraft operators and maintenance organisations, include adherence to the specified inspection requirements and ensuring that any identified issues are addressed in accordance with the FAA AD. This involves conducting the required inspections at the specified intervals and documenting the findings meticulously to ensure ongoing compliance. The regulations also mandate that any repairs or modifications must be performed by certified personnel following the guidelines provided by the FAA AD and relevant service bulletins. Failure to comply with these airworthiness directives can result in significant legal consequences. Under the Civil Aviation Act 1988, non-compliance can be considered an offence, leading to potential civil or criminal penalties. The severity of these penalties can vary, but they may include fines, suspension or revocation of airworthiness certificates, and other regulatory actions. The exact penalties depend on the nature and extent of the non-compliance, but the potential for severe repercussions underscores the importance of strict adherence to the regulations.