AD/B737/300 - Fuselage Frame Air Conditioning Bracket Attachments

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Legislation au F2007L00358 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 US FAA has issued AD 2006-26-09 affecting Boeing B737 model aircraft.  The USA is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/B737/300, which will become effective on 15 March 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 legislative framework for the regulation of civil aviation in Australia, ensuring the safety and efficiency of air navigation within the country. This Act allows for the creation of regulations that support the overarching goal of aviation safety, including the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). The ADs are legislative instruments designed to address specific issues that may affect the continuing airworthiness of aircraft. The policy objective is to ensure that aircraft remain safe to operate by mandating specific maintenance, repair, or replacement actions when necessary. The Civil Aviation Act 1988 empowers CASA to issue these directives in alignment with international standards, particularly under Annex 8 to the Convention on International Civil Aviation, which places the responsibility for continuing airworthiness on the State of Design and the State of Registry.

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, with the overarching aim of ensuring the safety of air navigation. Under this legislative framework, the Civil Aviation Safety Authority (CASA) is empowered to issue ADs concerning specific kinds of aircraft or aeronautical products. Such directives are considered disallowable instruments under the Acts Interpretation Act 1901 and are formalised as legislative instruments in accordance with the Legislative Instruments Act 2003. The authority to issue these directives stems from the international obligations of Australia under the Convention on International Civil Aviation, particularly Annex 8, which mandates that the State of Design is responsible for the continuing airworthiness of an aircraft type. CASA, acting as the national airworthiness authority, must respond to ADs issued by the State of Design by assessing their applicability to aircraft registered in Australia and, if necessary, issuing corresponding Australian ADs to enforce these safety requirements. The process of issuing ADs is largely governed by international standards and does not require public consultation or a Regulatory Impact Statement, as it is driven by the international commitments of Australia under the Convention.

Key Provisions

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legal framework for the regulation of airworthiness in Australia. Section 98 of the Act allows the Governor-General to make regulations that ensure the safety of air navigation, while regulation 39.001 of the Regulations permits the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. An AD is a disallowable instrument and thus a legislative instrument under section 6 of the Legislative Instruments Act 2003. These ADs are a crucial form of continuing airworthiness information, in line with Annex 8 to the Convention on International Civil Aviation, which assigns the State of Design the responsibility for ensuring the ongoing airworthiness of an aircraft type. In the case of Australian-registered aircraft, CASA, as the national airworthiness authority, must evaluate ADs issued by the State of Design and, if necessary, issue its own ADs to enforce these requirements. Under the Civil Aviation Safety Regulations 1998, the State of Registry for a specific aircraft bears the responsibility for its ongoing airworthiness. This involves developing or adopting measures to ensure that the aircraft remains airworthy. When the State of Design, such as the US Federal Aviation Administration (FAA), issues an AD for a type of aircraft registered in Australia, CASA must assess the AD and, if appropriate, issue a corresponding Australian AD. This process was followed for the Boeing B737 model, as evidenced by AD 2006-26-09 issued by the FAA, which CASA assessed and subsequently issued as Australian AD/B737/300, effective from 15 March 2007. The issuance of this AD is a direct result of Australia’s obligations under the Convention on International Civil Aviation and the need to respond to the AD raised by the relevant State of Design. Consequently, no public consultation was conducted, and the Office of Regulatory Review determined that a Regulatory Impact Statement was not necessary for this AD. The consequences for non-compliance with airworthiness directives in Australia are significant. Civil Aviation Safety Regulations 1998 include specific provisions that mandate adherence to ADs, and failure to comply can lead to substantial penalties. These penalties may include fines and imprisonment, reflecting the serious nature of non-compliance with airworthiness directives. The exact penalties are determined by the severity of the violation and the potential risk posed to aviation safety. The Civil Aviation Act 1988 also empowers CASA to take enforcement actions against entities that fail to comply with ADs, further emphasising the importance of adhering to these safety directives. The overarching goal is to ensure that all parties maintain the highest standards of airworthiness, thereby protecting public safety in aviation.

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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.