AD/SA 315/17 - Main Gearbox - Freewheel Coupling Bolts

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Legislation au F2007L01359 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 French DGAC issued AD 73-39-5 affecting Eurocopter SA315 helicopters. France is the State of Design for this helicopter series.  CASA has assessed this AD and has issued Australian AD/SA 315/17 which will become effective on 7 June 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, New Technologies and Systems, 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 ensure the safety of air navigation in Australia. Under this Act, the Governor-General is empowered to make regulations that serve the interests of safety, as outlined in section 98. One significant regulation, 39.001 of the Civil Aviation Safety Regulations 1998, allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products. These ADs are intended to maintain the continuing airworthiness of aircraft as per international standards, particularly under Annex 8 of the Convention on International Civil Aviation, where the State of Design has the overarching responsibility for ensuring the continuing airworthiness of an aircraft type. CASA, acting as Australia’s national airworthiness authority, must assess and, if necessary, issue Australian ADs to enforce these requirements. In the case of AD/SA 315/17, CASA responded to an airworthiness directive issued by the French Directorate General for Civil Aviation concerning Eurocopter SA315 helicopters, reflecting Australia's commitment to international civil aviation obligations.

Scope and Application

The Civil Aviation Safety Regulations 1998, pursuant to section 98 of the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products to ensure the safety of air navigation. This regulatory mechanism extends to all aircraft and aeronautical products registered within Australia, aligning with international standards set forth in Annex 8 to the Convention on International Civil Aviation. The State of Design holds the primary responsibility for the continuing airworthiness of an aircraft type, and CASA, as Australia's national airworthiness authority, must assess and, if necessary, issue Australian ADs to enforce the requirements set by the State of Design. For instance, following the issuance of French AD 73-39-5 affecting Eurocopter SA315 helicopters by the French Directorate General for Civil Aviation (DGAC), CASA assessed the directive and issued Australian AD/SA 315/17, which will be effective from 7 June 2007. Notably, due to the international obligations under the Convention on International Civil Aviation and the direct response to a State of Design AD, no public consultation was conducted, and the Office of Regulatory Review has determined that ADs do not require a Regulatory Impact Statement. The AD is made by the Manager, New Technologies and Systems, in the Manufacturing, Certification and New Technologies Office on behalf of CASA, in accordance with the Act.

Key Provisions

The key operative sections of the Civil Aviation Act 1988, as amended by the Civil Aviation Safety Regulations 1998, provide the framework for the issuance of airworthiness directives (ADs) under regulation 39.001. Specifically, section 98 of the Act empowers the Governor-General to create regulations that serve the interests of air navigation safety, while regulation 39.001(5) mandates that an AD is a disallowable instrument as per section 46A of the Acts Interpretation Act 1901. This means that ADs are legislative instruments subject to certain parliamentary scrutiny procedures. The ADs are tools used to ensure the continuing airworthiness of aircraft and aeronautical products, which are critical for maintaining safety standards in accordance with international conventions, particularly Annex 8 to the Convention on International Civil Aviation. The obligations and requirements imposed by these regulations are primarily on the Civil Aviation Safety Authority (CASA) and other relevant authorities. CASA, as Australia's national airworthiness authority, is tasked with assessing any airworthiness directives issued by the State of Design, which is the country responsible for the design of a specific aircraft type. Once CASA assesses the AD from the State of Design, it must determine whether to issue a corresponding Australian AD if necessary to comply with international safety standards. For example, when the French Directorate General for Civil Aviation (DGAC) issued AD 73-39-5 for Eurocopter SA315 helicopters, CASA assessed this directive and subsequently issued Australian AD/SA 315/17. These obligations ensure that aircraft registered in Australia meet the necessary safety standards as dictated by international agreements and the specific requirements of the aircraft's State of Design. Failure to comply with airworthiness directives can result in significant legal consequences. While the specific penalties for breaches of ADs are not detailed within the provided text, it is reasonable to infer that non-compliance with such directives could lead to enforcement actions, including potential fines, operational restrictions, or other regulatory penalties. Given the critical nature of airworthiness directives in ensuring the safety of air navigation, any breaches could also attract civil or criminal liability under broader aviation safety laws. Therefore, adherence to ADs is not merely a regulatory requirement but a legal obligation that carries serious repercussions for non-compliance.

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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.