AD/B737/344 - Nacelle Strut Midspar Fitting Fuse Pins

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Legislation au F2008L04388 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 2008-21-03 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/B737/344, which will become effective on 18 December 2008.

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, Airframes & Structures in the Airworthiness Engineering Group, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted to ensure the safety of air navigation and to provide for the regulation of civil aviation, allows the Governor-General to make regulations under section 98 to address safety concerns. In accordance with regulation 39.001 of the Civil Aviation Safety Regulations 1998, the Civil Aviation Safety Authority (CASA) can issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products, which are legislative instruments under the Legislative Instruments Act 2003. This legislative framework is designed to uphold the continuing airworthiness of aircraft, aligning with international standards under Annex 8 of the Convention on International Civil Aviation, where the State of Design holds primary responsibility for an aircraft type's airworthiness. CASA, acting as Australia’s national airworthiness authority, assesses these international ADs and issues corresponding Australian ADs when necessary, ensuring compliance with both international obligations and domestic safety standards.

Scope and Application

The Civil Aviation Act 1988, along with the Civil Aviation Safety Regulations 1998, provides a framework for the regulation of airworthiness directives (ADs) in Australia. Under this legislation, the Civil Aviation Safety Authority (CASA) has the authority to issue ADs for specific types of aircraft or aeronautical products to ensure the safety of air navigation. These ADs serve as a mechanism to maintain the continuing airworthiness of aircraft as required by the Convention on International Civil Aviation. The Act applies to aircraft registered in Australia and their operators, as well as to CASA, which acts as the national airworthiness authority. The geographic reach of the Act is national, with CASA's jurisdiction extending across Australia. The Act does not provide specific exclusions or exemptions for ADs but operates under the authority granted by the Civil Aviation Act and the associated regulations. Any amendments or extensions of the Act's application are made through subordinate instruments, which are legislative instruments subject to disallowance and review processes as outlined in the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003.

Key Provisions

The key operative sections of the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 allow for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA) to ensure the continuing airworthiness of aircraft and aeronautical products (sections 98 and 39.001). An AD is a legislative instrument under section 46A of the Acts Interpretation Act 1901 and section 6 of the Legislative Instruments Act 2003. The State of Design, in this case, the USA for Boeing B737 aircraft, is responsible for ensuring the continuing airworthiness of the aircraft type and must provide necessary information to the States of Registry. CASA, as Australia’s national airworthiness authority, must then assess this information and, if appropriate, issue an Australian AD to mandate the requirements of the State of Design. The obligations imposed by these regulations require CASA to assess airworthiness directives issued by the State of Design and to issue corresponding Australian ADs when necessary. This includes ensuring that the continuing airworthiness of aircraft registered in Australia complies with international standards set by the International Civil Aviation Organization (ICAO) as outlined in Annex 8 to the Convention on International Civil Aviation. CASA must also ensure that the ADs are communicated effectively to relevant stakeholders, such as aircraft operators and maintenance organisations, to ensure compliance with safety standards. Failure to comply with an AD may result in serious consequences for both individuals and entities. Civil penalties can include fines for non-compliance, with the maximum penalty for each day of non-compliance being substantial, as specified under the Civil Aviation Act 1988. Additionally, criminal penalties may apply, including fines of up to $222,200 for individuals and $1,111,000 for bodies corporate, as well as potential imprisonment terms. CASA may also take enforcement actions such as grounding aircraft, which can have significant operational and financial implications for the non-compliant entity. In summary, the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 establish a framework for CASA to issue airworthiness directives to ensure the continuing airworthiness of aircraft. These regulations impose obligations on CASA to assess and implement ADs from the State of Design, and on aircraft operators and maintenance organisations to comply with these directives. Non-compliance can lead to significant civil and criminal penalties, underscoring the importance of adherence to these safety regulations.

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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.