AD/DH 84/4 - Streamline Wires

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2005L03459 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 UK CAA has issued AD G-2005-0033 affecting De Havilland 84 model aircraft.  The UK is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/DH 84/4, which will become effective on 9 November 2005. 

As this AD is issued because of Australia’s obligations under Convention on International Civil Aviation, and because it is issued in response to an AD raised by the relevant State of Design, no consultation of the Australian public has taken place on this AD.  The Office of Regulatory Review has determined that ADs do not require a Regulatory Impact Statement.

The AD has been made by the Manager, Airframes in the Manufacturing, Certification and New Technologies Office, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, was established to provide a comprehensive legal framework for civil aviation in Australia, addressing the need for safety regulations and the governance of air navigation. The Act empowers the Governor-General to make regulations for the safety of air navigation, including the issuance of airworthiness directives (ADs) under section 98. These regulations, such as those stipulated in the Civil Aviation Safety Regulations 1998, allow the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products, ensuring adherence to international safety standards. The Act underscores Australia's commitment to international conventions, particularly Annex 8 to the Convention on International Civil Aviation, which mandates the State of Design to maintain the continuing airworthiness of aircraft types and communicate necessary information to States of Registry, including Australia. In fulfilling these obligations, CASA issues Australian ADs to enforce the requirements set by the State of Design, thereby ensuring the safety and airworthiness of aircraft registered in Australia.

Scope and Application

The Civil Aviation Act 1988, in conjunction with the Civil Aviation Safety Regulations 1998, provides the framework within which airworthiness directives (ADs) are issued to ensure the safety of air navigation. Under the Act, the Governor-General has the authority to create regulations that serve the interests of air navigation safety, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specified types of aircraft or aeronautical products. These ADs are legislative instruments and are subject to disallowance under the Acts Interpretation Act 1901. The ADs are essential for maintaining the continuing airworthiness of aircraft and are issued by states in accordance with Annex 8 to the Convention on International Civil Aviation. In Australia, CASA, as the national airworthiness authority, must assess ADs issued by the State of Design and, if necessary, issue corresponding Australian ADs to comply with international obligations. The issuance of such ADs does not require public consultation or a Regulatory Impact Statement, as determined by the Office of Regulatory Review. This legislative framework ensures that Australia meets its international commitments while maintaining stringent safety standards for civil aviation.

Key Provisions

The Civil Aviation Act 1988, specifically section 98, empowers the Governor-General to enact regulations that serve the interests of air navigation safety. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 extends this authority to the Civil Aviation Safety Authority (CASA), allowing it to issue airworthiness directives (ADs) for specified types of aircraft or aeronautical products. These ADs are legislative instruments under section 6 of the Legislative Instruments Act 2003, as they are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901. Entities governed by the Civil Aviation Act 1988, particularly those operating within the Australian aviation sector, must comply with these airworthiness directives. CASA, acting as the national airworthiness authority, must review any ADs issued by the State of Design and determine if an Australian AD is necessary. The State of Registry, which holds responsibility for the individual aircraft's continuing airworthiness, must also adhere to these directives to ensure that all aircraft registered within Australia meet the requisite safety standards. Non-compliance with airworthiness directives can result in significant consequences. Depending on the severity of the breach, it may lead to enforcement actions, fines, or other penalties under the Civil Aviation Act 1988. For example, if a person or entity fails to comply with an airworthiness directive, they could be subject to civil or criminal penalties, with maximum fines and imprisonment terms outlined in the relevant sections of the Act. These stringent measures are in place to uphold the highest standards of aviation safety and ensure the well-being of all passengers and crew. The issuance of ADs, particularly those mandated by international agreements like Annex 8 to the Convention on International Civil Aviation, underscores the importance of global cooperation in maintaining aviation safety standards. While the specific details and procedures for issuing ADs are detailed in the Civil Aviation Safety Regulations 1998, the overarching goal is to provide a framework that ensures all aircraft remain airworthy and safe for operation. The collaborative effort between the State of Design, State of Registry, and regulatory authorities like CASA exemplifies the coordinated approach required to achieve this objective.

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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.