AD/BO 105/16 - Tension-Torsion Strap

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Legislation au F2007L02681 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.

Transport Canada has issued AD CF-99-24R1 affecting Eurocopter Canada BO 105 LS-A3 model helicopters.  Canada is the State of Design for this model.  CASA has assessed this AD and has issued Australian AD/BO 105/16, which will become effective on 27 September 2007.

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 Best Practice Regulation has determined that ADs do not require a Regulatory Impact Statement.

 

The AD has been made by the Manager, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, governs the regulation of civil aviation and air navigation safety in Australia. This Act empowers the Governor-General to make regulations that align with the Act's objectives and serve the interests of air navigation safety. One significant regulation made under this Act is the Civil Aviation Safety Regulations 1998, which allow the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs). These ADs are legislative instruments designed to mandate safety requirements for aircraft types or aeronautical products, ensuring their continuing airworthiness in accordance with international standards set forth by the Convention on International Civil Aviation. The issuance of ADs, particularly in response to directives from the State of Design, reflects Australia's commitment to international safety standards and its obligation to maintain the airworthiness of aircraft registered within its territory. This legislative framework ensures that CASA, as the national airworthiness authority, can effectively implement safety measures derived from international obligations, thereby safeguarding the safety of air navigation within Australia.

Scope and Application

The Civil Aviation Safety Regulations 1998, under the authority of the Civil Aviation Act 1988, mandate that airworthiness directives (ADs) can be issued by the Civil Aviation Safety Authority (CASA) for specific kinds of aircraft or aeronautical products. These directives, which serve as a legislative instrument, aim to ensure the safety of air navigation by addressing potential safety issues identified in aircraft types or aeronautical products. The authority to issue these directives is grounded in Annex 8 to the Convention on International Civil Aviation, which assigns the State of Design the responsibility for the continuing airworthiness of an aircraft type. In cases where Australia is the State of Registry, CASA must assess and, if necessary, issue an Australian AD to enforce the requirements of the relevant State of Design. The ADs are designed to maintain the continuing airworthiness of aircraft registered in Australia and align with international standards set by ICAO Contracting States. The process of issuing ADs is governed by the regulations and does not typically involve public consultation or require a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation. This regulatory framework ensures that CASA, as Australia's national airworthiness authority, can respond to international safety directives and maintain the highest safety standards for aircraft operating within Australian jurisdiction.

Key Provisions

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legal framework for the issuance and enforcement of airworthiness directives (ADs). Under section 98 of the Act, the Governor-General is empowered to create regulations in the interest of air navigation safety, and regulation 39.001 specifically allows the Civil Aviation Safety Authority (CASA) to issue ADs for particular types of aircraft or aeronautical products. An AD is a legislative instrument that falls under the purview of section 46A of the Acts Interpretation Act 1901 and is regulated under the Legislative Instruments Act 2003. These ADs are critical tools for ensuring the continuing airworthiness of aircraft, as they mandate safety requirements that must be met by the aircraft's State of Registry. The State of Design, which is the country where the aircraft was designed, has the responsibility to provide necessary information to ensure the continuing airworthiness of an aircraft type. This information is typically disseminated through ADs, which are then assessed by the State of Registry. In Australia, CASA is responsible for issuing ADs to ensure compliance with international standards, particularly when ADs are issued by the State of Design. Under these regulations, CASA is obligated to assess ADs issued by the State of Design and to issue corresponding Australian ADs if appropriate. For instance, following the issuance of AD CF-99-24R1 by Transport Canada concerning Eurocopter Canada BO 105 LS-A3 model helicopters, CASA has issued Australian AD/BO 105/16, which will take effect on 27 September 2007. Because this AD is a response to international obligations and is issued by the relevant State of Design, no public consultation has been required. Additionally, the Office of Best Practice Regulation has determined that such ADs do not necessitate a Regulatory Impact Statement. Non-compliance with ADs can lead to serious consequences, including potential civil or criminal penalties. While specific penalties are not detailed in the provided text, non-compliance with airworthiness directives generally results in significant regulatory actions, which could include fines, suspension of airworthiness certificates, or even criminal charges in severe cases. These measures are intended to ensure that all aircraft meet the necessary safety standards, thereby safeguarding the public and maintaining the integrity of air navigation systems.

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Civil Aviation Law
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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.