AD/LA-4/22 - Engine Mount Tie Rod Ends - CANCELLED

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Legislation au F2009L02217 Not in force Legislative Instrument

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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/LA-4/22 affecting Consolidated Aeronautics, Colonial LA-4 series aeroplanes.  CASA has assessed this AD and as a result has cancelled Australian AD/LA-4/22.  The cancellation will become effective on 2 July 2009.  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 Group, 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 legal framework for the regulation of civil aviation in Australia, aiming to ensure the safety and efficiency of air navigation. The Act empowers the Governor-General to make regulations for the purposes of the Act, including the issuance of airworthiness directives to enhance the safety of air navigation, as stipulated in section 98. The Civil Aviation Safety Regulations 1998 further detail the regulatory requirements, with regulation 39.001 authorising the issuance of airworthiness directives by the Civil Aviation Safety Authority (CASA). This regulatory framework is designed to align with international standards, particularly those set by the International Civil Aviation Organization (ICAO), as outlined in Annex 8 to the Convention on International Civil Aviation. This alignment ensures that Australia’s approach to airworthiness is consistent with global best practices, thereby safeguarding the safety of Australian airspace and fostering international cooperation in aviation safety.

Scope and Application

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legislative framework for ensuring the safety of air navigation in Australia. Under these provisions, the Civil Aviation Safety Authority (CASA) is empowered to issue airworthiness directives (ADs) concerning specific types of aircraft or aeronautical products to ensure compliance with safety standards. These directives are legislative instruments that fall under the purview of the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. The issuance of ADs is guided by Annex 8 to the Convention on International Civil Aviation, which mandates that the State of Design is responsible for the continuing airworthiness of aircraft types and must provide necessary information to States of Registry. CASA, as Australia’s national airworthiness authority, must assess this information and issue corresponding ADs as necessary to ensure the safety of aircraft registered in Australia. The scope of these regulations applies to aircraft registered in Australia, including both domestic and international entities operating such aircraft within Australian jurisdiction. The ADs are designed to address specific safety concerns and ensure that aircraft maintain their airworthiness throughout their operational life. Notably, the cancellation of an AD, such as the one affecting Consolidated Aeronautics, Colonial LA-4 series aeroplanes, is made in accordance with Australia’s obligations under international aviation agreements and does not require public consultation or a Regulatory Impact Statement.

Key Provisions

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 establish the framework for ensuring the safety of air navigation, with specific provisions for the issuance of airworthiness directives (ADs) (section 98 and regulation 39.001). An AD is a legislative instrument that can be issued by the Civil Aviation Safety Authority (CASA) for certain types of aircraft or aeronautical products (regulation 39.001(5)). These ADs are critical tools for maintaining the continuing airworthiness of aircraft, a responsibility that falls to the State of Design and the State of Registry as outlined in Annex 8 to the Convention on International Civil Aviation. When a State of Design issues an AD, CASA must review the information and, if necessary, issue an Australian AD to enforce the requirements. Entities governed by the Civil Aviation Act and the Civil Aviation Safety Regulations, including aircraft manufacturers, operators, and CASA, must adhere to the provisions of ADs. For instance, the State of Design has a responsibility to provide necessary information to ensure the continuing airworthiness of aircraft types, while the State of Registry must develop or adopt requirements to maintain the airworthiness of individual aircraft registered within its jurisdiction. CASA, as Australia’s national airworthiness authority, must assess ADs issued by the State of Design and determine whether to issue corresponding Australian ADs. Failure to comply with ADs can lead to serious consequences. The Civil Aviation Act and associated regulations impose obligations on entities such as aircraft manufacturers and operators to ensure compliance with ADs. Non-compliance can result in enforcement actions by CASA, which may include fines, suspension or revocation of airworthiness certificates, or other regulatory penalties. The specifics of these penalties are not detailed in the provided text but are typically substantial, reflecting the critical nature of airworthiness requirements. In summary, the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide a comprehensive framework for the issuance and enforcement of ADs, ensuring the safety of air navigation. These regulations impose clear obligations on the State of Design, State of Registry, and CASA, with significant consequences for non-compliance. The process ensures that aircraft maintain their airworthiness and adhere to international safety standards.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.