AD/HU 369/116 - Lateral Mixer Output Link Assembly

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

Legislation au F2007L00748 In force Legislative Instrument

Legislation content

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 US FAA has issued AD 2007-05-51 affecting MDHI MD600N model helicopters.  The USA is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/HU 369/116, which will become effective on 12 April 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 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 provide for the safety and efficiency of civil aviation within Australia, and it serves as the primary legislative framework for the regulation of civil aviation activities. This Act was introduced to address the need for comprehensive and coordinated regulation of civil aviation to ensure public safety and to meet international standards. The Act empowers the Governor-General to make regulations that promote the safety of air navigation, and it establishes the Civil Aviation Safety Authority (CASA) as the national airworthiness authority responsible for enforcing these regulations. Under section 98 of the Act, CASA is mandated to issue airworthiness directives (ADs) when necessary to maintain the safety standards of aircraft and aeronautical products. These directives are crucial in ensuring that aircraft meet continuing airworthiness requirements as stipulated by international conventions, such as Annex 8 to the Convention on International Civil Aviation. The policy objective of the Act is to facilitate a robust and reliable civil aviation system that aligns with global safety standards and practices.

Scope and Application

The Civil Aviation Safety Regulations 1998, under section 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products to ensure the safety of air navigation, as mandated by section 98 of the Civil Aviation Act 1988. These ADs serve as legislative instruments under the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. The application of these directives is integral to the continuing airworthiness of aircraft types, with the State of Design bearing the primary responsibility for providing necessary information to the States of Registry, as outlined in Annex 8 to the Convention on International Civil Aviation. In the case of Australian-registered aircraft, CASA must evaluate and, when necessary, issue Australian ADs to enforce the requirements set by the relevant State of Design. For instance, in response to the US Federal Aviation Administration's AD 2007-05-51 concerning MDHI MD600N model helicopters, CASA issued Australian AD/HU 369/116, effective from 12 April 2007, without public consultation due to the international obligations under the Convention on International Civil Aviation. This legislative process underscores the importance of harmonising airworthiness standards across jurisdictions to maintain aviation safety.

Key Provisions

The Civil Aviation Safety Regulations 1998, under regulation 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products (39.001(1)). These directives are intended to address issues related to the continuing airworthiness of aircraft and are issued in response to identified safety concerns. Furthermore, subregulation 39.001(5) specifies that an AD is a disallowable instrument under section 46A of the Acts Interpretation Act 1901, which classifies it as a legislative instrument in accordance with section 6 of the Legislative Instruments Act 2003. These provisions ensure that ADs are legally binding and enforceable measures. The obligations imposed by these regulations require CASA to act promptly in response to airworthiness directives issued by the State of Design. Specifically, when a State of Design, such as the US Federal Aviation Administration (FAA), issues an AD for a type of aircraft registered in Australia, CASA must assess the directive to determine its relevance and necessity for Australian-registered aircraft (39.001(2)). If CASA deems the directive necessary, it must then issue an Australian AD to mandate compliance with the safety requirements outlined by the State of Design. This process ensures that Australian-registered aircraft meet international safety standards and that CASA fulfills its duty to protect the public from aviation hazards. Non-compliance with an Australian AD can result in significant legal consequences. Under the Civil Aviation Act 1988, failure to comply with an AD can be considered an offence, with potential civil and criminal penalties. For instance, section 65 of the Act outlines that any person who contravenes an AD may be subject to a civil penalty, which can include fines up to a specified maximum amount. Additionally, serious breaches could lead to criminal charges, with potential imprisonment for individuals or corporations found guilty of non-compliance. These penalties underscore the importance of adhering to ADs to maintain the high safety standards expected in civil aviation. In summary, the Civil Aviation Safety Regulations 1998 establish a framework for the issuance and enforcement of airworthiness directives by CASA. These regulations impose clear obligations on CASA to assess and respond to directives from the State of Design, ensuring that Australian-registered aircraft comply with necessary safety standards. The potential legal consequences of non-compliance, including fines and imprisonment, highlight the seriousness of adhering to these directives to protect public safety in aviation.

Legal classification tags

Area of Law
Administrative Law
Aviation Law
Instrument
Regulation
Concepts
Definitions & Interpretation
Regulatory Standards
Enforcement Powers
Reporting & Disclosure Obligations

Interactions

Authorises

All Versions

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.