AD/BELL 412/40 Amdt 1 - Main Rotor Yoke

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Legislation au F2006L00448 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 Italian authority (ENAC) has issued AD 1999-179 affecting Agusta AB412 model helicopters.  Italy is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/BELL 412/40, Amendment 1, which will become effective on 16 March 2006.  This AD cancels and replaces the previous issue.

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 regulation of civil aviation in Australia, addressing the need for a comprehensive legal framework to ensure the safety and efficiency of civil aviation within the country. The Act empowers the Governor-General to make regulations for the purposes of the Act and in the interests of the safety of air navigation. One such regulation, regulation 39.001 of the Civil Aviation Safety Regulations 1998, allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for kinds of aircraft or aeronautical products. This authority is exercised in accordance with international obligations under the Convention on International Civil Aviation, specifically Annex 8, which designates the State of Design with overall responsibility for the continuing airworthiness of an aircraft type. CASA, as Australia’s national airworthiness authority, is required to assess any ADs issued by the State of Design and, if appropriate, issue corresponding Australian ADs to mandate the necessary requirements for continuing airworthiness. This legislative framework ensures that Australian aviation remains aligned with international safety standards.

Scope and Application

The Civil Aviation Safety Regulations 1998, under the overarching authority of the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. This regulatory framework is designed to ensure the safety of air navigation in Australia, as mandated by section 98 of the Act. The authority to issue these directives is grounded in international obligations, particularly those outlined in Annex 8 to the Convention on International Civil Aviation, which places the responsibility for continuing airworthiness on the State of Design and the State of Registry. CASA, acting on behalf of Australia, must assess and, if necessary, issue Australian ADs that align with directives from the relevant State of Design, such as the Italian authority ENAC, which issued AD 1999-179 affecting Agusta AB412 model helicopters. This specific AD, assessed and subsequently issued by CASA as AD/BELL 412/40, Amendment 1, reflects Australia's commitment to international standards and is effective from 16 March 2006. Given that these directives are a direct response to international obligations and are not subject to public consultation or a Regulatory Impact Statement, they represent a legislative instrument under the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003.

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 particular types of aircraft or aeronautical products, in line with section 98 of the Civil Aviation Act 1988. This is a legislative instrument under section 6 of the Legislative Instruments Act 2003 and a disallowable instrument under section 46A of the Acts Interpretation Act 1901. Airworthiness directives are essential tools for ensuring the continuing airworthiness of aircraft types, mandated by Annex 8 to the Convention on International Civil Aviation. When a State of Design issues an AD, the State of Registry must assess it and, if necessary, issue a corresponding AD to enforce the State of Design’s requirements on aircraft registered within its jurisdiction. The obligations under these regulations are stringent. The State of Design holds primary responsibility for the continuing airworthiness of a particular aircraft type and must provide necessary information to the States of Registry. In Australia, CASA, as the national airworthiness authority, must evaluate this information and, if deemed necessary, issue an Australian AD. This ensures compliance with international standards and obligations under the Convention on International Civil Aviation. For instance, following the issuance of an AD by the Italian authority ENAC for Agusta AB412 model helicopters, CASA assessed the directive and issued Australian AD/BELL 412/40, Amendment 1, effective from 16 March 2006. Failure to comply with airworthiness directives can result in severe consequences. The Civil Aviation Act 1988 and associated regulations mandate strict adherence to ADs to maintain safety standards. Non-compliance can lead to significant civil or criminal penalties. While specific penalties are not detailed in the provided text, it is clear that breaches can attract serious legal repercussions, given the critical nature of airworthiness directives in maintaining aviation safety. CASA's authority to issue these directives and enforce compliance underscores the importance of adhering to the stipulated requirements.

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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.