AD/750XL/11 - Rudder Trim Tab Pivot

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Legislation au F2007L01350 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 New Zealand CAA has issued AD DCA/750XL/11 affecting Pacific Aerospace PAC 750XL model aircraft.  New Zealand is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/750XL/11, which will become effective on 7 June 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, Airframes 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 comprehensive legislative framework for the regulation of civil aviation in Australia, ensuring the safety and efficiency of air navigation and operations. In this context, the Civil Aviation Safety Regulations 1998, particularly under regulation 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for certain types of aircraft or aeronautical products, thereby reinforcing the safety standards and compliance requirements under international conventions such as the Convention on International Civil Aviation. This regulatory approach ensures that Australia fulfils its international obligations, particularly regarding the continuing airworthiness of aircraft, and mandates CASA to issue corresponding ADs when required by the State of Design, as exemplified by the issuance of AD/750XL/11 in response to a New Zealand AD affecting Pacific Aerospace PAC 750XL model aircraft.

Scope and Application

The Civil Aviation Safety Regulations 1998, under section 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) to ensure the safety of air navigation. These directives apply to specific types of aircraft or aeronautical products as mandated by the Civil Aviation Act 1988. Notably, ADs are considered legislative instruments under the Legislative Instruments Act 2003. Each AD corresponds to an aircraft type's State of Design, which holds the responsibility for the aircraft's continuing airworthiness, in alignment with Annex 8 to the Convention on International Civil Aviation. In instances where a State of Design issues an AD, such as the one issued by New Zealand for the Pacific Aerospace PAC 750XL model aircraft, CASA, as Australia's national airworthiness authority, is obliged to evaluate the information and, if necessary, issue a corresponding Australian AD to enforce the requirements of the State of Design. This ensures compliance with international standards and maintains the safety standards of aircraft registered in Australia.

Key Provisions

The Civil Aviation Act 1988, through section 98, allows the Governor-General to establish regulations aimed at ensuring the safety of air navigation. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 further empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. These directives, as specified in subregulation 39.001(5), are classified as disallowable instruments under section 46A of the Acts Interpretation Act 1901 and are therefore legislative instruments in their own right, subject to the provisions of the Legislative Instruments Act 2003. In accordance with Annex 8 of the Convention on International Civil Aviation, the State of Design holds primary responsibility for the ongoing airworthiness of an aircraft type. This includes providing any necessary information to ensure the aircraft’s continued airworthiness to the appropriate States of Registry. ADs are a prevalent form of continuing airworthiness information and are issued by most ICAO Contracting States. Conversely, the State of Registry is tasked with ensuring the continuing airworthiness of an individual aircraft, developing or adopting the necessary requirements as stipulated under Annex 8. When a State of Design, such as New Zealand, issues an AD for a type of aircraft registered in Australia, CASA must assess the information and, if necessary, issue an Australian AD to enforce the requirements of the State of Design. New Zealand, as the State of Design for the Pacific Aerospace PAC 750XL model aircraft, has issued AD DCA/750XL/11. CASA has evaluated this AD and has subsequently issued Australian AD/750XL/11, which will take effect on 7 June 2007. Given that this AD is issued due to Australia’s commitments under the Convention on International Civil Aviation and in response to an AD from the relevant State of Design, no consultation with the Australian public has been undertaken. The Office of Regulatory Review has concluded that ADs do not necessitate a Regulatory Impact Statement. The AD was promulgated by the Manager, Airframes in the Manufacturing, Certification and New Technologies Office, on behalf of CASA, in compliance with subsection 84A(2) of the Act. The ADs impose obligations on aircraft operators, manufacturers, and other relevant parties to comply with the specified requirements to ensure the continued airworthiness of the aircraft. Failure to comply with an AD can lead to severe consequences, including potential grounding of the aircraft, fines, and legal penalties. The Civil Aviation Safety Regulations 1998 and the Civil Aviation Act 1988 outline the regulatory framework within which these obligations are enforced. Penalties for non-compliance may include substantial fines and, in severe cases, criminal charges. The exact penalties can vary depending on the nature and severity of the breach but are intended to enforce strict adherence to airworthiness standards.

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Aviation Law
Instrument
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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.