AD/AC/23 - Main Landing Gear Struts - Inspection and Modification - CANCELLED

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, serves to regulate civil aviation in Australia with a primary focus on ensuring the safety of air navigation. The Act empowers the Governor-General to create regulations in the interests of air navigation safety, which includes the issuance of airworthiness directives by the Civil Aviation Safety Authority (CASA) as per regulation 39.001 of the Civil Aviation Safety Regulations 1998. This legislative framework addresses the need for continuous airworthiness of aircraft, ensuring that aircraft meet safety standards throughout their operational life. As part of its functions under the Act, CASA issues airworthiness directives when required, which are legislative instruments subject to disallowance under the Acts Interpretation Act 1901 and regulation as per the Legislative Instruments Act 2003. The authority to issue these directives arises from Australia's commitments under the Convention on International Civil Aviation, specifically Annex 8, which mandates that the State of Design remains responsible for the ongoing airworthiness of an aircraft type. The Civil Aviation Safety Authority, acting in its capacity as Australia's national airworthiness authority, is tasked with assessing international directives and issuing corresponding Australian directives as necessary to comply with these international standards.

Scope and Application

The Civil Aviation Safety Regulations 1998, under section 98 of the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products. This regulation serves to ensure the continuing airworthiness of aircraft within Australia, aligning with the responsibilities outlined in Annex 8 to the Convention on International Civil Aviation. ADs are critical legislative instruments used to mandate safety measures and are issued by most International Civil Aviation Organization (ICAO) Contracting States. In Australia, CASA, as the national airworthiness authority, must evaluate ADs issued by the State of Design and determine if an Australian AD is necessary to enforce these measures on aircraft registered in Australia. The AD/AC/23, which affected all Twin Aero Commander aircraft models, was assessed by CASA and subsequently cancelled, effective from 31 July 2008, as the unsafe condition it addressed no longer existed. This cancellation was conducted under Australia's obligations under the Convention on International Civil Aviation, and no public consultation was required. Additionally, the Office of Best Practice Regulation has determined that ADs do not necessitate a Regulatory Impact Statement.

Key Provisions

The key operative sections of the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legislative framework for issuing airworthiness directives (ADs). Under section 98 of the Civil Aviation Act 1988, the Governor-General has the authority to make regulations for the purposes of the Act, particularly to ensure the safety of air navigation. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specific kinds of aircraft or aeronautical products. Furthermore, subregulation 39.001(5) establishes that ADs are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901, and therefore, they are legislative instruments as per section 6 of the Legislative Instruments Act 2003. The Act and the Regulations impose several obligations and requirements on the parties involved. The State of Design is responsible for ensuring the continuing airworthiness of an aircraft type and must provide necessary information to appropriate States of Registry. The State of Registry, in this case CASA, has the duty to assess the information provided by the State of Design and, if appropriate, issue an Australian AD to mandate the requirements. When CASA cancels an AD, such as Australian AD/AC/23 affecting all Twin Aero Commander aircraft models, it must do so in accordance with Australia's obligations under the Convention on International Civil Aviation. In this particular instance, CASA has assessed the AD and determined that the unsafe condition no longer exists, leading to the cancellation of the AD effective from 31 July 2008. Failure to comply with the requirements set out in the ADs may result in various offences and penalties. Under the Civil Aviation Act 1988, any person who contravenes an AD may be subject to civil or criminal penalties, depending on the nature and severity of the breach. Civil penalties can include fines, while criminal penalties can result in imprisonment. The exact maximum penalties are not specified in the provided text but would generally be determined by the courts based on the specific circumstances of the offence. In summary, the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide a comprehensive framework for the issuance and enforcement of airworthiness directives. These legislative instruments mandate the responsibilities of the State of Design and the State of Registry, as well as the obligations of CASA in ensuring the safety of air navigation. Compliance with ADs is crucial to maintaining the airworthiness of aircraft, and failure to do so may result in civil or criminal penalties.