AD/PMC/50 - RPM Restriction and Life Limit

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Legislation au F2007L01049 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 Unites States FAA has issued AD 2007-08-04 affecting McCauley Model 3A32C406/82NDB-X and D3A32C409/82NDB-X propellers.  The United States is the State of Design for these propellers.  CASA has assessed this AD and has issued Australian AD/PMC/50, which will become effective on 20 April 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 provide a legislative framework for ensuring the safety of civil aviation in Australia, and the Civil Aviation Safety Regulations 1998 were made under the authority of this Act. The Act and accompanying regulations establish the roles and responsibilities of various parties in ensuring the continuing airworthiness of aircraft, including the authority for the Civil Aviation Safety Authority (CASA) to issue airworthiness directives. These directives are a legislative instrument used to mandate compliance with safety requirements for aircraft and aeronautical products, as set out in Annex 8 to the Convention on International Civil Aviation. The problem or gap this legislation addresses is the need for a coordinated and authoritative framework to manage airworthiness issues, particularly in response to international safety directives issued by States of Design. The enactment of this legislation by the Parliament of Australia aims to ensure that Australia's civil aviation safety standards are aligned with international obligations and effectively protect public safety. The issuing of airworthiness directives under this framework, such as the one concerning McCauley propellers, underscores CASA's commitment to fulfilling its duty under the Civil Aviation Act 1988 to safeguard air navigation safety.

Scope and Application

The Civil Aviation Act 1988, as amended by the Civil Aviation Safety Regulations 1998, encompasses the scope and application of airworthiness directives (ADs) within Australia's regulatory framework. These directives, issued under regulation 39.001, serve to ensure the continuing airworthiness of aircraft and aeronautical products, aligning with the requirements set forth in Annex 8 of the Convention on International Civil Aviation. The application of these directives extends to all aircraft registered within Australia, irrespective of the aircraft type or the industry involved. The regulatory authority vested in the Civil Aviation Safety Authority (CASA) mandates that, upon receiving an AD from the State of Design, CASA must assess its applicability and, if necessary, issue a corresponding Australian AD to enforce the necessary safety measures. This process underscores the jurisdictional reach of the Civil Aviation Act, ensuring compliance with international standards while maintaining the safety of air navigation within Australia's national airspace. While ADs are legislative instruments and subject to disallowance, they do not require public consultation or a Regulatory Impact Statement as per the Office of Regulatory Review's determination.

Key Provisions

The Civil Aviation Act 1988, under section 98, empowers the Governor-General to make regulations that are essential for the safety of air navigation. The Civil Aviation Safety Regulations 1998, specifically regulation 39.001, allow the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for certain types of aircraft or aeronautical products. These ADs are subject to disallowance under section 46A of the Acts Interpretation Act 1901 and are considered legislative instruments under section 6 of the Legislative Instruments Act 2003. The obligations imposed by the Act and the associated regulations require the State of Design to ensure the continuing airworthiness of an aircraft type, as stipulated in Annex 8 of the Convention on International Civil Aviation. The State of Design must provide necessary information to appropriate States of Registry. In Australia, the State of Registry is responsible for the continuing airworthiness of individual aircraft and must develop or adopt requirements to ensure this. When the State of Design issues an AD, CASA, as Australia's national airworthiness authority, must assess this information and, if deemed necessary, issue an Australian AD to enforce the requirements. For example, the United States, as the State of Design, issued AD 2007-08-04 affecting certain McCauley propellers, prompting CASA to issue Australian AD/PMC/50, effective from 20 April 2007. There are no provisions for public consultation on ADs as they arise from Australia's obligations under the Convention on International Civil Aviation and are in response to ADs issued by the relevant State of Design. The Office of Regulatory Review has determined that ADs do not require a Regulatory Impact Statement. The ADs are 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. Under the Civil Aviation Safety Regulations 1998, any breach of an AD can lead to significant consequences. Failure to comply with an AD can result in severe penalties, including fines and imprisonment, as specified under the Act. The severity of these penalties reflects the critical importance of adhering to ADs for maintaining the safety of air navigation. CASA has the authority to enforce compliance and take action against any non-compliance, ensuring that all aircraft operating in Australia meet the required safety standards.

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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.