AD/PMC/49 - Propeller Blade Cracking - CANCELLED

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Legislation au F2008L02890 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 United States FAA has issued AD 2008-08-01 affecting McCauley Propeller Systems propellers.  The United States is the State of Design for these propellers. CASA has assessed this AD and as a result has cancelled Australian AD/PMC/49.  The cancellation will become effective on 28 August 2008.  The AD has been replaced by AD/PMC/52.

As this AD has been cancelled because of Australia’s obligations under the Convention on International Civil Aviation, and because it is cancelled in response to an AD raised by the relevant State of Design, no consultation with the Australian public has taken place on this AD cancellation.  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 Airworthiness Engineering Branch, 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, ensuring safety and efficiency within the industry. The Act empowers the Governor-General to make regulations necessary for the safety of air navigation, including the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). The Civil Aviation Safety Regulations 1998 further detail the process and authority for issuing these ADs, which are legislative instruments subject to disallowance under the Acts Interpretation Act 1901. In line with international obligations under Annex 8 to the Convention on International Civil Aviation, the State of Design is responsible for the continuing airworthiness of aircraft types, and CASA must issue corresponding ADs to ensure compliance with these international standards. The problem or gap this legislation addresses is the need for standardised, internationally-recognised measures to maintain the airworthiness of aircraft registered in Australia, ensuring public safety and harmonisation with global aviation standards.

Scope and Application

The Civil Aviation Act 1988 and the associated Civil Aviation Safety Regulations 1998 provide the framework for the regulation of civil aviation in Australia, focusing on ensuring the safety of air navigation. Under this legislative framework, the Civil Aviation Safety Authority (CASA) has the authority to issue airworthiness directives (ADs) to mandate the requirements for the continuing airworthiness of aircraft and aeronautical products, as stipulated in regulation 39.001 of the Civil Aviation Safety Regulations 1998. These ADs are legislative instruments that must be assessed and potentially issued by CASA in response to directives issued by the State of Design of an aircraft type. The ADs are made to align with international standards, particularly those outlined in Annex 8 to the Convention on International Civil Aviation, which places the responsibility for the continuing airworthiness of an aircraft type on the State of Design. CASA, as Australia’s national airworthiness authority, ensures that these international obligations are met by assessing and, where necessary, issuing Australian ADs. The scope of the ADs applies to all aircraft and aeronautical products registered in Australia, and CASA’s role extends to the assessment and implementation of ADs issued by foreign authorities, such as the United States Federal Aviation Administration, to ensure compliance with international standards and obligations.

Key Provisions

The Civil Aviation Act 1988, as amended by the Civil Aviation Safety Regulations 1998, provides the framework under which airworthiness directives (ADs) are issued and managed in Australia. Section 98 of the Act empowers the Governor-General to make regulations for the safety of air navigation, while regulation 39.001 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specified aircraft or aeronautical products. According to subregulation 39.001(5), an AD is a disallowable instrument as per section 46A of the Acts Interpretation Act 1901, thereby classifying it as a legislative instrument. This means ADs carry legal weight and are subject to specific legislative processes. Under the obligations set forth by these provisions, CASA, as Australia’s national airworthiness authority, must ensure the continuing airworthiness of aircraft by assessing information from the State of Design, which is the country responsible for the design of the aircraft type. When the State of Design issues an AD, CASA must evaluate this directive and, if necessary, issue a corresponding Australian AD to enforce the State of Design’s requirements. This reflects the principle under Annex 8 to the Convention on International Civil Aviation, which assigns the State of Design overall responsibility for the continuing airworthiness of an aircraft type and requires it to provide necessary information to States of Registry. The Civil Aviation Safety Regulations 1998 also impose a duty on the State of Registry to develop or adopt requirements to maintain the airworthiness of aircraft registered within its territory. Consequently, when CASA issues an AD, it must adhere to these regulations, ensuring that the safety standards align with international obligations and the specific needs of the Australian aviation sector. In terms of legal consequences, any failure to comply with the requirements set out in an AD can result in serious civil or criminal penalties. While specific penalties are not detailed in the text, non-compliance with airworthiness directives can lead to enforcement actions, including fines and potential criminal charges under the Civil Aviation Act 1988. The Act’s provisions and regulations are designed to ensure that all stakeholders, including aircraft operators and manufacturers, adhere to stringent safety standards to protect the public and maintain the integrity of the aviation industry.

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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.