AD/DART/5 - Reduction Gear Oil Seal - CANCELLED

Overview

The Civil Aviation Act 1988, enacted to ensure the safety and efficiency of civil aviation in Australia, authorises the Governor-General to make regulations for air navigation safety. Under this authority, the Civil Aviation Safety Regulations 1998 allow the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. ADs are legislative instruments that are crucial for maintaining the continuing airworthiness of aircraft types, aligning with international standards set forth by the International Civil Aviation Organization (ICAO). The State of Registry, in this case CASA, must ensure that these ADs are appropriately assessed and, if necessary, issued to mandate the requirements of the State of Design. This regulatory framework is essential for protecting public safety in air navigation. CASA, Australia’s national airworthiness authority, has the responsibility to review and, if appropriate, cancel ADs when the conditions necessitating them no longer exist. This ensures the regulatory burden is proportionate and aligned with current safety standards.

Scope and Application

The Civil Aviation Act 1988 and its associated Civil Aviation Safety Regulations 1998 provide the legislative framework for the regulation of civil aviation in Australia, including the issuance of airworthiness directives (ADs). According to the Act, the Governor-General has the authority to make regulations for the purposes of the Act, particularly to ensure the safety of air navigation, and these regulations extend to the issuance of ADs by the Civil Aviation Safety Authority (CASA). These ADs serve as legislative instruments under the Legislative Instruments Act 2003 and are essential for ensuring the continuing airworthiness of aircraft as per international standards set by the Convention on International Civil Aviation. The ADs are issued by the State of Design for an aircraft type, and the State of Registry is responsible for implementing these directives for individual aircraft within its jurisdiction. In the case of AD/DART/5, which affected Rolls Royce (Dart) turbine engines, CASA, as the national airworthiness authority, reviewed and subsequently decided to cancel the directive, effective from 24 September 2009, as the unsafe condition it was addressing no longer existed. This cancellation does not require public consultation or a Regulatory Impact Statement, as it reduces the regulatory burden without introducing new risks. The AD cancellation was authorised by the Manager, New Technology and Regulatory Trends, within CASA, in accordance with the Civil Aviation Act.

Key Provisions

The main operative sections of the Civil Aviation Act 1988, as supplemented by the Civil Aviation Safety Regulations 1998, provide the Civil Aviation Safety Authority (CASA) with the authority to issue airworthiness directives (ADs). Section 98 of the Act allows the Governor-General to make regulations for the safety of air navigation, and regulation 39.001 specifically empowers CASA to issue ADs for certain kinds of aircraft or aeronautical products. This authority is further clarified by subregulation 39.001(5), which designates ADs as disallowable instruments under section 46A of the Acts Interpretation Act 1901, and thus as legislative instruments according to section 6 of the Legislative Instruments Act 2003. The obligations imposed by the Act and the Regulations on parties such as CASA and States of Design and Registry are significant. The State of Design, under Annex 8 to the Convention on International Civil Aviation, must ensure the continuing airworthiness of aircraft types and provide necessary information to States of Registry. The State of Registry, in turn, is responsible for maintaining the airworthiness of individual aircraft by developing or adopting appropriate requirements. CASA, as Australia’s national airworthiness authority, must review ADs issued by States of Design and, if necessary, issue corresponding Australian ADs to ensure compliance with safety standards. Failure to comply with the ADs can result in serious consequences. Under the Civil Aviation Act 1988, non-compliance with an AD can be considered an offence, potentially leading to civil or criminal penalties. While the specific penalties are not detailed in the provided text, it is well-established within the Act that significant fines and imprisonment can be imposed for breaches. The severity of these penalties underscores the critical nature of adhering to airworthiness directives to ensure public safety and compliance with international aviation standards. Additionally, the Act’s framework includes mechanisms for reviewing and cancelling ADs when the conditions necessitating their issuance no longer exist. In the case of AD/DART/5 concerning Rolls Royce (Dart) turbine engines, CASA reviewed the directive and determined that the unsafe condition no longer existed, leading to its cancellation effective from 24 September 2009. This cancellation, which reduces regulatory burden, did not require public consultation or a Regulatory Impact Statement as determined by the Office of Best Practice Regulation. The AD cancellation was made by the Manager, New Technology and Regulatory Trends, in accordance with subsection 84A(2) of the Act, ensuring that CASA’s actions are both legally sound and aligned with safety objectives.