AD/HU 369/7 Amdt 1 - Oil Cooler Blow System - Modification - CANCELLED

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Legislation au F2009L01891 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/HU 369/7 Amendment 1 affecting McDonnell Douglas (Hughes) 369 series Helicopters.  CASA has assessed this AD and as a result has cancelled Australian AD/HU 369/7 Amendment 1.  The cancellation will become effective on 4 June 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 Systems and New Technologies, 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 regulatory framework for civil aviation in Australia, ensuring the safety and efficiency of air navigation and operations. This legislation grants the Governor-General the authority to create regulations under section 98, as well as allowing the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for types of aircraft or aeronautical products, pursuant to regulation 39.001 of the Civil Aviation Safety Regulations 1998. This regulatory mechanism is integral to maintaining the safety standards required under Annex 8 to the Convention on International Civil Aviation, where the State of Design is responsible for the continuing airworthiness of an aircraft type, and the State of Registry must implement requirements to ensure the ongoing airworthiness of individual aircraft within its jurisdiction. The ADs are a crucial tool in this process, ensuring that any identified unsafe conditions are addressed promptly and effectively. The enactment of this legislation and the subsequent regulations reflect Australia's commitment to meeting international standards and ensuring the highest levels of safety in civil aviation.

Scope and Application

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legal framework for the regulation of civil aviation in Australia, with specific provisions concerning the issuance of airworthiness directives (ADs) to ensure the safety of air navigation. Under the Act, the Governor-General has the authority to make regulations, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. These ADs are legislative instruments, as outlined in the Legislative Instruments Act 2003, and serve as a means for continuing airworthiness information as mandated by Annex 8 to the Convention on International Civil Aviation. The State of Design is responsible for the continuing airworthiness of an aircraft type, and the State of Registry must ensure the airworthiness of individual aircraft. CASA, acting as Australia’s national airworthiness authority, is required to assess ADs issued by States of Design and, if necessary, issue Australian ADs to enforce these requirements. In this instance, CASA cancelled Australian AD/HU 369/7 Amendment 1 for McDonnell Douglas (Hughes) 369 series Helicopters, as the unsafe condition addressed by the AD no longer exists, and this action aligns with Australia’s obligations under the Convention on International Civil Aviation.

Key Provisions

The Civil Aviation Act 1988, in particular section 98, empowers the Governor-General to enact regulations aimed at ensuring the safety of air navigation. This authority is exercised through regulation 39.001 of the Civil Aviation Safety Regulations 1998, which allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. It is important to note that these ADs, as per subregulation 39.001(5), are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901 and are legislative instruments in accordance with section 6 of the Legislative Instruments Act 2003. The obligations imposed by these regulations on the parties governed are significant. The State of Design has the overarching responsibility for the continuing airworthiness of an aircraft type and must provide any necessary information to ensure its airworthiness to the appropriate State of Registry. In the case of Australia, CASA, as the national airworthiness authority, must assess information provided by the State of Design and, if appropriate, issue an Australian AD to enforce the requirements of the State of Design. This ensures that aircraft registered in Australia remain airworthy and comply with international standards. Failure to comply with the requirements of ADs can result in serious consequences. While specific offences and penalties are not detailed in this text, it is clear that non-compliance with ADs can lead to safety issues and potential legal ramifications. Given the critical nature of airworthiness directives, any breach of these regulations could potentially lead to severe civil or criminal penalties, although the exact penalties are not specified within the provided text. In summary, the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 establish a framework where CASA issues airworthiness directives to ensure the safety and airworthiness of aircraft. These regulations place a substantial burden on the State of Design to provide necessary information and on the State of Registry, via CASA, to enforce these directives. Non-compliance with these directives can result in significant consequences, underscoring the importance of adhering to these regulations.

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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.