AD/A109/20 - Main Rotor Hydraulic Actuators - CANCELLED

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Legislation au F2009L03122 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.

CASA issued AD/A109/20 affecting Agusta A109 series helicopters.  CASA has reviewed this AD and as a result has decided to cancel it.  The cancellation will become effective 27 August 2009.  No replacement AD is required, as the original unsafe condition no longer exists.

No consultation with the Australian public has taken place on this AD cancellation, because the cancellation results in a reduction of the regulatory burden.  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, Future Technology and Regulatory Trends, in the Standards Development and Future Technology Division, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, establishes the framework for ensuring the safety and efficiency of civil aviation within Australia. The Act empowers the Governor-General to make regulations that support the overarching objective of air navigation safety. One such regulation, detailed in the Civil Aviation Safety Regulations 1998, allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) concerning specific types of aircraft or aeronautical products. These ADs are essential for maintaining the continuing airworthiness of aircraft, a responsibility shared between the State of Design and the State of Registry as per Annex 8 to the Convention on International Civil Aviation. CASA, as Australia's national airworthiness authority, plays a critical role in issuing Australian ADs that reflect the requirements set forth by the State of Design. The legislative process for ADs, including their disallowance and review, ensures that the aviation industry adheres to stringent safety standards while minimizing unnecessary regulatory burdens.

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, as mandated by section 98 of the Civil Aviation Act 1988. This legislative framework ensures that ADs, which serve as critical tools for maintaining the continuing airworthiness of aircraft, are issued in accordance with international standards set forth in Annex 8 of the Convention on International Civil Aviation. The State of Design is responsible for the initial airworthiness of a type of aircraft, while the State of Registry, in this case CASA as Australia’s national airworthiness authority, must adopt these directives to mandate necessary requirements for aircraft registered in Australia. An example of this regulatory process is evident in CASA’s issuance and subsequent cancellation of AD/A109/20 for Agusta A109 series helicopters, reflecting the dynamic nature of aviation safety regulations and the authority's responsiveness to emerging safety conditions. This AD cancellation, which eliminates an existing regulatory burden, does not require public consultation or a Regulatory Impact Statement as per the Office of Best Practice Regulation’s guidelines.

Key Provisions

The key provisions of the Civil Aviation Act 1988, specifically concerning the issuance of airworthiness directives (ADs), are outlined in section 98 and regulation 39.001 of the Civil Aviation Safety Regulations 1998. Section 98 of the Act empowers the Governor-General to make regulations for the safety of air navigation, and regulation 39.001 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific kinds of aircraft or aeronautical products. Furthermore, subregulation 39.001(5) clarifies that ADs are disallowable instruments under section 46A of the Acts Interpretation Act 1901, making them legislative instruments as per section 6 of the Legislative Instruments Act 2003. These provisions establish CASA's authority to issue ADs in line with international standards set by Annex 8 to the Convention on International Civil Aviation. The State of Design, which is responsible for the continuing airworthiness of an aircraft type, must provide necessary information to States of Registry. Consequently, CASA, as Australia's national airworthiness authority, is tasked with assessing the information provided by the State of Design and issuing Australian ADs if appropriate. For example, CASA issued AD/A109/20 concerning Agusta A109 series helicopters, but has since decided to cancel it as the unsafe condition no longer exists. In terms of obligations, CASA must ensure the continuing airworthiness of aircraft registered in Australia, aligning with the requirements set out in Annex 8. When a State of Design issues an AD, CASA must review and, if necessary, issue a corresponding Australian AD to enforce the safety measures. The cancellation of AD/A109/20, which was communicated by CASA, indicates that the unsafe condition identified in the original AD has been resolved, and no further regulatory action is required. Offences and penalties for breaches of the Civil Aviation Act 1988 and the associated regulations are not explicitly detailed in the provided text. However, in general, non-compliance with airworthiness directives can result in civil or criminal penalties, depending on the severity of the breach and the specific provisions of the Act. The maximum penalties for such offences can vary widely, but they may include fines and imprisonment for more serious violations.

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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.