AD/AL501/3 - First Stage Turbine Wheels

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Legislation au F2006L01350 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 80-14-13 affecting Rolls Royce AL 501 series engines.  The United States is the State of Design for this engine series.  CASA has assessed this AD and has issued Australian AD/AL501/3, which will become effective on 8 June 2006.

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, enacted by the Commonwealth Parliament, governs the regulation of civil aviation in Australia and was introduced to ensure the safety and efficiency of air navigation. Under this Act, the Civil Aviation Safety Regulations 1998 were subsequently established to provide further detail on the regulatory framework for aviation safety, including the process for issuing airworthiness directives (ADs). These ADs are legislative instruments made by the Civil Aviation Safety Authority (CASA) to mandate the requirements necessary for the continuing airworthiness of aircraft and aeronautical products in accordance with international standards. The ADs are a response to Australia’s obligations under the Convention on International Civil Aviation, ensuring that Australian aircraft meet internationally recognised safety standards. In the case of AD/AL501/3, CASA issued this directive in response to a corresponding directive from the United States Federal Aviation Administration regarding Rolls Royce AL 501 series engines, reflecting the collaborative nature of international aviation safety standards.

Scope and Application

The Civil Aviation Safety Regulations 1998, under the authority granted by the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specified types of aircraft or aeronautical products. These directives are mandated by the State of Design, which holds the primary responsibility for the continuing airworthiness of an aircraft type, as stipulated in Annex 8 to the Convention on International Civil Aviation. Consequently, CASA, as Australia’s national airworthiness authority, must assess the ADs issued by the State of Design and, where necessary, issue corresponding Australian ADs to ensure compliance with international standards. The ADs are considered legislative instruments and are subject to disallowance under the Acts Interpretation Act 1901. In the instance of the AD issued by the United States Federal Aviation Administration (FAA) affecting the Rolls Royce AL 501 series engines, CASA has issued the Australian AD/AL501/3, which will take effect on 8 June 2006. Given the nature of ADs as continuing airworthiness information and their alignment with international obligations, no public consultation has been required, and no Regulatory Impact Statement was necessary. The AD is issued by the Manager, New Technologies and Systems, in the Manufacturing, Certification and New Technologies Office, on behalf of CASA, in accordance with the Civil Aviation Act 1988.

Key Provisions

The Civil Aviation Act 1988, along with the Civil Aviation Safety Regulations 1998, provides the legal framework for ensuring the safety of air navigation in Australia. Specifically, section 98 of the Act allows the Governor-General to make regulations that support the Act, and regulation 39.001 of the Regulations empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. These ADs, which are considered legislative instruments, are issued to ensure the continuing airworthiness of aircraft as mandated by Annex 8 of the Convention on International Civil Aviation. Under these provisions, CASA has the authority to issue ADs when necessary. The State of Design, which is the country where the aircraft type was designed, has the primary responsibility for the continuing airworthiness of that aircraft type and must provide necessary information to the State of Registry, which is the country where the aircraft is registered. When the State of Design issues an AD for a type of aircraft on the Australian Register, CASA must evaluate this information and, if deemed appropriate, issue a corresponding Australian AD to enforce the State of Design's requirements. The Civil Aviation Safety Regulations 1998 specify that ADs are not subject to disallowance under section 46A of the Acts Interpretation Act 1901 and are not required to undergo the consultation process or a Regulatory Impact Statement. Instead, CASA issues ADs on behalf of the Australian government, ensuring compliance with international standards while maintaining the safety of Australian airspace. In terms of compliance, parties subject to an AD must adhere to the specified requirements to ensure the continuing airworthiness of their aircraft. Failure to comply with an AD can result in severe consequences. Although the Act does not specify penalties for non-compliance with ADs, non-compliance can lead to serious safety issues, which could result in enforcement actions by CASA, including fines, suspension or revocation of aircraft operating certificates, and potential criminal charges for serious violations. For example, the United States Federal Aviation Administration (FAA) issued AD 80-14-13 affecting Rolls Royce AL 501 series engines, and CASA subsequently issued Australian AD/AL501/3. Any failure to comply with this AD could result in CASA taking enforcement actions, reflecting the importance of adhering to airworthiness directives to maintain the safety of air navigation.

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Aviation Law
Instrument
Regulation
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Definitions & Interpretation
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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.