AD/DH 85/2 - Streamline Wires

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

Legislation au F2005L02789 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-2005-0025 affecting DH 85 model aircraft.  The UK is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/DH 85/2, which will become effective on 27 October 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 was enacted to establish a comprehensive legal framework for civil aviation in Australia, addressing the need for safety regulations and oversight in the aviation sector. This legislation was introduced to ensure the safe operation of aircraft and to meet Australia's obligations under international conventions such as the Convention on International Civil Aviation. The Act grants the Governor-General the authority to make regulations necessary for the safety of air navigation, including the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). The policy objective of the Act is to maintain high safety standards in the civil aviation industry, both domestically and in alignment with international standards. The Civil Aviation Safety Regulations 1998 provide the regulatory mechanism for implementing the provisions of the Civil Aviation Act 1988, specifically allowing CASA to issue ADs for kinds of aircraft or aeronautical products. These ADs are legislative instruments that mandate safety measures to ensure the continuing airworthiness of aircraft. In line with international obligations, the State of Design for a particular aircraft type has the responsibility for providing necessary information to ensure its continuing airworthiness, while the State of Registry must implement these requirements. CASA, as Australia's national airworthiness authority, assesses information from foreign ADs and issues corresponding Australian ADs as necessary, ensuring compliance with both domestic and international standards.

Scope and Application

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legislative framework for issuing airworthiness directives (ADs) in Australia, aimed at ensuring the safety of air navigation. Under regulation 39.001 of the Civil Aviation Safety Regulations 1998, the Civil Aviation Safety Authority (CASA) is empowered to issue ADs for specific kinds of aircraft or aeronautical products. These directives are considered legislative instruments under the Legislative Instruments Act 2003. The State of Design for an aircraft type bears overall responsibility for its continuing airworthiness and must provide necessary information to States of Registry, which are tasked with ensuring the airworthiness of individual aircraft registered within their jurisdiction. CASA, as Australia’s national airworthiness authority, assesses information from the State of Design and, if necessary, issues corresponding Australian ADs to enforce the safety requirements. The issuance of these ADs is often a response to directives from other ICAO Contracting States, such as the UK Civil Aviation Authority's AD G-2005-0025 affecting DH 85 model aircraft, which CASA has assessed and converted into Australian AD/DH 85/2, effective from 27 October 2005. The process of issuing such ADs does not typically require public consultation or a Regulatory Impact Statement, as they are issued in response to international obligations and specific safety concerns.

Key Provisions

The Civil Aviation Act 1988, as supplemented by the Civil Aviation Safety Regulations 1998, provides the framework under which airworthiness directives (ADs) are issued and enforced. Section 98 of the Act empowers the Governor-General to make regulations for air navigation safety, while regulation 39.001 of the Civil Aviation Safety Regulations 1998 specifically allows the Civil Aviation Safety Authority (CASA) to issue ADs for types of aircraft or aeronautical products. The text further clarifies that an AD is considered a legislative instrument under the Legislative Instruments Act 2003, and it is also a disallowable instrument under section 46A of the Acts Interpretation Act 1901. This legal standing underscores the importance and formality of ADs in maintaining air safety standards. The obligations imposed by the Act and Regulations are primarily centred on ensuring the continuing airworthiness of aircraft. Under Annex 8 to the Convention on International Civil Aviation, the State of Design holds overarching responsibility for the airworthiness of a particular aircraft type, and must provide necessary information to States of Registry. The State of Registry, in this case CASA as Australia’s national airworthiness authority, is mandated to assess information from the State of Design and, if deemed appropriate, issue a corresponding Australian AD. This ensures that all aircraft registered in Australia comply with internationally recognised safety standards. For example, the UK Civil Aviation Authority (CAA) issued AD G-2005-0025 for the DH 85 model aircraft, prompting CASA to issue Australian AD/DH 85/2 to mandate these requirements for Australian-registered aircraft. Failing to comply with an AD can result in significant legal consequences. The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 outline various offences and penalties for non-compliance. While the specific penalties are not detailed in the provided text, it is well-established within Australian aviation law that violations of ADs can lead to substantial fines, enforcement actions, and potential grounding of non-compliant aircraft. These measures are designed to enforce adherence to safety standards and protect public safety in air travel. The legislative process for issuing an AD, as evidenced by the example of AD/DH 85/2, involves a thorough assessment by CASA of the AD issued by the State of Design. This process ensures that the AD aligns with Australia's obligations under the Convention on International Civil Aviation. Importantly, such ADs do not require public consultation or a Regulatory Impact Statement, as determined by the Office of Regulatory Review. This streamlined process ensures that safety directives are issued promptly and efficiently, reflecting the urgency and importance of maintaining airworthiness standards. The AD was ultimately 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, highlighting the structured and authoritative nature of this regulatory process.

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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.