AD/RAD/93 - Rockwell Collins TDR-94/94D Transponders - Aircraft Type Category

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Legislation au F2010L00703 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 European Aviation Safety Authority (EASA) has issued AD 2010-0003R1 affecting Rockwell Collins TDR-94 and TDR-94D Air Traffic Control Mode S Transponders.  EASA is regarded as the State of Design for these transponders having issued Technical Standard Order (TSO) Authorisations for the transponders under European TSO ETSO-2C112b.  CASA has assessed this AD and has issued Australian AD/RAD/93, which will become effective on 26 March 2010.

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 Continuing Airworthiness in the Airworthiness and 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 with a focus on safety. The Act empowers the Governor-General to make regulations for the purposes of the Act, particularly concerning the safety of air navigation, and delegates authority to the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for aircraft and aeronautical products under regulation 39.001 of the Civil Aviation Safety Regulations 1998. These ADs are legislative instruments that can be disallowed under section 46A of the Acts Interpretation Act 1901. The Civil Aviation Act 1988 was designed to address the need for stringent and internationally compliant regulations to ensure the safety and airworthiness of aircraft operating within Australian airspace. The Act was enacted by the Australian Parliament and aims to align Australian aviation safety standards with international obligations, particularly those outlined in the Convention on International Civil Aviation.

Scope and Application

The Civil Aviation Act 1988, supplemented by the Civil Aviation Safety Regulations 1998, governs the issuance of airworthiness directives (ADs) in Australia, ensuring the continuing airworthiness of aircraft and aeronautical products. Under the Act, the Governor-General can make regulations in the interests of air navigation safety, and regulation 39.001 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. These ADs serve as legislative instruments and are subject to disallowance under the Acts Interpretation Act 1901. The issuance of ADs aligns with Australia's obligations under the Convention on International Civil Aviation, particularly Annex 8, which delineates the responsibilities of the State of Design and the State of Registry concerning aircraft airworthiness. CASA, acting as Australia's national airworthiness authority, is mandated to assess and, if necessary, issue Australian ADs in response to directives from the relevant State of Design. For instance, in response to EASA’s AD 2010-0003R1 concerning Rockwell Collins TDR-94 and TDR-94D Air Traffic Control Mode S Transponders, CASA issued Australian AD/RAD/93, effective from 26 March 2010. Notably, ADs do not require public consultation or a Regulatory Impact Statement, and they are issued under the authority of the Manager Continuing Airworthiness in CASA’s Airworthiness and Engineering Branch, in accordance with subsection 84A(2) of the Act.

Key Provisions

The Civil Aviation Safety Regulations 1998, under regulation 39.001, provide the authority for the Civil Aviation Safety Administration (CASA) to issue airworthiness directives (ADs). These directives are legislative instruments that apply to specific types of aircraft or aeronautical products and are mandated by section 98 of the Civil Aviation Act 1988, which allows for regulations to ensure the safety of air navigation. In particular, regulation 39.001(5) of the Civil Aviation Safety Regulations 1998 stipulates that ADs are disallowable instruments under section 46A of the Acts Interpretation Act 1901, and they are considered legislative instruments as per section 6 of the Legislative Instruments Act 2003. The obligations imposed by the ADs pertain primarily to the State of Design and the State of Registry. According to Annex 8 of the Convention on International Civil Aviation, the State of Design is responsible for the continuing airworthiness of an aircraft type, including the provision of necessary information to States of Registry to ensure compliance with airworthiness standards. The State of Registry, on the other hand, is tasked with ensuring that each aircraft under its jurisdiction remains airworthy. When an AD is issued by the State of Design, CASA, as Australia's national airworthiness authority, must review the information and, if necessary, issue an Australian AD to enforce the requirements of the State of Design. Failure to comply with ADs can result in serious legal consequences. Under the Civil Aviation Act 1988, operators and owners of aircraft who do not adhere to ADs may face criminal and civil penalties. The specific penalties can vary depending on the severity and circumstances of the breach, but they can include substantial fines and imprisonment for individuals. For corporations, the penalties can be even more severe, potentially including fines that can reach into the millions of dollars. The Act also provides for the possibility of grounding aircraft that do not comply with airworthiness requirements, which can have significant operational and financial repercussions for the operators. Additionally, CASA has the authority to take enforcement actions against non-compliance with ADs, including the issuance of notices requiring compliance, the imposition of fines, and the initiation of legal proceedings. The severity of these actions is commensurate with the level of non-compliance and the risk posed to aviation safety. In extreme cases, CASA may also suspend or revoke the airworthiness certificates of non-compliant aircraft, effectively prohibiting them from flying until the required actions are taken to bring them into compliance. These provisions underscore the importance of adhering to ADs to maintain the high standards of aviation safety in Australia.

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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.