CIVIL AVIATION ACT 1988
CIVIL AVIATION SAFETY REGULATIONS 1998
ISSUE OF AIRWORTHINESS DIRECTIVE
Under section 98 of the Civil Aviation Act 1988, the Governor-General may make regulations for the purposes of the Act and in the interests of the safety of air navigation. Under regulation 39.001 of the Civil Aviation Safety Regulations 1998, CASA may issue airworthiness directives (ADs) for kinds of aircraft or aeronautical products. Subregulation 39.001(5) of the Civil Aviation Safety Regulations 1998 provides that an AD is a disallowable instrument for the purposes of section 46A of the Acts Interpretation Act 1901. Therefore, in accordance with section 6 of the Legislative Instruments Act 2003, an AD is a legislative instrument.
Under Annex 8 to the Convention on International Civil Aviation, the State of Design has overall responsibility for continuing airworthiness of an aircraft type, and must provide any information necessary to ensure the continuing airworthiness of a type to appropriate States of Registry. ADs (and their equivalents) are the most common form of continuing airworthiness information, and are issued by most ICAO Contracting States.
The State of Registry of an individual aircraft is responsible for its continuing airworthiness. Under Annex 8, the State of Registry must develop or adopt requirements to ensure the continuing airworthiness of aircraft. When a State of Design issues an AD against a type of aircraft on the Australian Register, CASA, as Australia’s national airworthiness authority, must assess that information and, if appropriate, issue an Australian AD to mandate the requirements of the State of Design.
The Civil Aviation Safety Authority or its predecessors issued AD/AC/48 affecting Twin Aero Commander 500S aircraft model. CASA has assessed this AD and as a result has cancelled Australian AD/AC/48. The cancellation will become effective on 31 July 2008. No replacement AD is required, as the unsafe condition no longer exists.
As this AD has been cancelled because of Australia’s obligations under the Convention on International Civil Aviation, no consultation with the Australian public has taken place on this AD cancellation. The Office of Best Practice Regulation has determined that ADs do not require a Regulatory Impact Statement.
The AD has been made by the Manager, Airframe and Structures, in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.
Overview
The Civil Aviation Act 1988 was enacted to establish a comprehensive framework for ensuring the safety and efficiency of civil aviation in Australia. It empowers the Governor-General to create regulations necessary for the safety of air navigation, including the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). These ADs are integral to maintaining the continuing airworthiness of aircraft, aligning with international standards set by the International Civil Aviation Organization (ICAO). The Act, administered by the Commonwealth Parliament, aims to harmonise Australian aviation regulations with international standards, ensuring that the safety of air navigation is maintained both domestically and in accordance with global conventions.
The cancellation of AD/AC/48 for the Twin Aero Commander 500S aircraft model exemplifies the application of the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998. CASA, as Australia's national airworthiness authority, cancelled this AD due to the resolution of the unsafe condition that prompted its issuance, reflecting Australia's commitment to international civil aviation obligations. The cancellation process, overseen by the Manager, Airframe and Structures in the Airworthiness Engineering Branch of CASA, underscores the authority's role in implementing and enforcing airworthiness directives to ensure the safety and compliance of aircraft registered in Australia. This action highlights the importance of adhering to international standards and the regulatory framework established by the Civil Aviation Act 1988.
Scope and Application
The Civil Aviation Act 1988 and the associated Civil Aviation Safety Regulations 1998 provide the legislative framework for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). Under section 98 of the Act, the Governor-General has the power to make regulations that promote the safety of air navigation, and regulation 39.001 of the Safety Regulations allows CASA to issue ADs for specific kinds of aircraft or aeronautical products. These ADs are legislative instruments subject to disallowance and are aligned with international standards under Annex 8 of the Convention on International Civil Aviation. The State of Design holds primary responsibility for the continuing airworthiness of an aircraft type, while the State of Registry must ensure the ongoing airworthiness of individual aircraft on its register. Consequently, when a State of Design issues an AD, CASA must review the information and issue a corresponding Australian AD if necessary. In this instance, CASA cancelled the Australian AD/AC/48 for Twin Aero Commander 500S aircraft as the unsafe condition it addressed no longer exists, fulfilling Australia’s international obligations without the need for public consultation or a Regulatory Impact Statement.
Key Provisions
The key operative sections of the Civil Aviation Act 1988, particularly section 98, empower the Governor-General to create regulations that ensure the safety of air navigation. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products. This regulatory framework is crucial for maintaining safety standards in civil aviation. Subregulation 39.001(5) further clarifies that an AD is a disallowable instrument, meaning it can be disallowed by either House of Parliament under the Acts Interpretation Act 1901. Additionally, it is considered a legislative instrument as per the Legislative Instruments Act 2003.
The obligations imposed by this Act and the associated regulations are significant. The State of Design, which is the country where the aircraft was designed, must ensure the continuing airworthiness of the aircraft type and provide necessary information to the States of Registry. Conversely, the State of Registry, which in this case is Australia, has the responsibility to develop or adopt requirements to maintain the airworthiness of the aircraft registered within its jurisdiction. When an AD is issued by a State of Design, CASA must assess the information and, if necessary, issue a corresponding Australian AD to enforce the requirements stipulated by the State of Design.
In terms of legal consequences, failure to comply with ADs could result in severe penalties. Although the text does not specify the exact penalties, it is implied that non-compliance could lead to civil or criminal sanctions, considering the critical nature of airworthiness directives in maintaining aviation safety. The legislative framework ensures that both the State of Design and the State of Registry adhere to international standards set by the Convention on International Civil Aviation, particularly Annex 8, to safeguard air navigation safety.
The Act also outlines that ADs do not require a Regulatory Impact Statement, and there is no need for public consultation when cancelling an AD, as was the case with AD/AC/48 affecting the Twin Aero Commander 500S aircraft model. This AD was cancelled because the unsafe condition it was addressing no longer existed. CASA's decision to cancel the AD was made in accordance with subsection 84A(2) of the Act, ensuring that the action aligns with legislative mandates and international obligations.