AD/BO 105/17 - Main Rotorhead Parts

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Legislation au F2007L02680 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.

Transport Canada has issued AD CF-2005-17 affecting Eurocopter Canada BO 105 LS-A3 model helicopters.  Canada is the State of Design for this model.  CASA has assessed this AD and has issued Australian AD/BO 105/17, which will become effective on 27 September 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 Best Practice Regulation has determined that ADs do not require a Regulatory Impact Statement.

 

The AD has been made by the Manager, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, established a framework for the regulation of civil aviation in Australia, focusing on ensuring the safety of air navigation. It empowers the Governor-General to make regulations that serve the interests of air navigation safety, including the issuance of airworthiness directives (ADs). The Civil Aviation Safety Regulations 1998 further detail the processes by which ADs can be issued by the Civil Aviation Safety Authority (CASA) to ensure the continuing airworthiness of aircraft and aeronautical products. The policy objective of these regulations is to align with international standards set by the International Civil Aviation Organization (ICAO) and to address safety concerns collaboratively with other ICAO Contracting States, particularly in the context of continuing airworthiness of aircraft types. The legislative mechanism for issuing these directives is designed to respond efficiently to safety issues identified by the State of Design, without necessitating public consultation due to the international obligations and the technical nature of the directives.

Scope and Application

The Civil Aviation (Airworthiness) Regulations 1998, as amended, provide the regulatory framework for issuing airworthiness directives (ADs) under the Civil Aviation Act 1988. These regulations apply to any person or entity involved in the operation, maintenance, or design of aircraft within Australia, and their scope extends to ensuring the continuing airworthiness of all aircraft types registered in Australia. ADs are regulatory instruments issued by the Civil Aviation Safety Authority (CASA) under regulation 39.001, mandated by Annex 8 to the Convention on International Civil Aviation. They are issued in response to identified safety issues concerning specific types or models of aircraft, and they establish mandatory requirements to address these issues. The ADs are applicable to all aircraft of the specified type registered in Australia, regardless of the location of their operation. The ADs are legislative instruments under the Legislative Instruments Act 2003 and are subject to disallowance as per the Acts Interpretation Act 1901. Given their international nature and the necessity to align with global aviation safety standards, these ADs are issued without public consultation and do not require a Regulatory Impact Statement. The regulations may be extended or modified through subordinate instruments, ensuring flexibility in addressing emerging safety concerns.

Key Provisions

The Civil Aviation Act 1988, specifically section 98, empowers the Governor-General to make regulations in the interest of air navigation safety. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 further allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for certain types of aircraft or aeronautical products. These ADs, detailed in subregulation 39.001(5), are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901 and are legislative instruments as per section 6 of the Legislative Instruments Act 2003. The ADs play a crucial role in ensuring the continuing airworthiness of aircraft types as mandated by Annex 8 of 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 the appropriate States of Registry. CASA, as Australia’s national airworthiness authority, must assess the information provided by the State of Design and, if appropriate, issue an Australian AD to enforce the requirements. The obligations imposed by these provisions require CASA to evaluate and, where necessary, issue Australian ADs when the State of Design issues an AD that affects aircraft registered in Australia. This ensures that the continuing airworthiness of aircraft registered in Australia is maintained in accordance with international standards. Additionally, the State of Registry, which in this case is Australia, must develop or adopt requirements to ensure the continuing airworthiness of aircraft within its jurisdiction. This responsibility includes implementing any necessary actions as mandated by ADs issued by the State of Design or CASA. Failure to comply with the requirements set forth by an AD can result in serious consequences. The Civil Aviation Safety Regulations 1998 include provisions that outline offences and penalties for breaches. For instance, operating an aircraft in a manner that contravenes an AD may be considered an offence under the Civil Aviation Act 1988. Penalties for such offences can include substantial fines and, in severe cases, imprisonment. The exact penalties depend on the nature and severity of the breach, but the regulations are designed to ensure strict adherence to airworthiness standards to maintain the highest levels of safety in air navigation.

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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.