AD/B737/244 - Engine Strut Seal

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Legislation au F2005L01350 In force Legislative Instrument

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CIVIL AVIATION ACT 1988

CIVIL AVIATION 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 2005-08-10 affecting Boeing 737 model aircraft.  The USA is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/B737/244, which will become effective on 7 July 2005.

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 Section Head - Airframes, Airworthiness Standards Branch, Standards Division, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Commonwealth Parliament, serves to regulate civil aviation in Australia with the primary objective of ensuring the safety and efficiency of air navigation. The Act empowers the Governor-General to establish regulations that align with the Act’s safety objectives, including the issuance of airworthiness directives (ADs). These ADs, which are critical for maintaining the continuing airworthiness of aircraft, are issued under the authority of the Civil Aviation Safety Regulations 1998 and must be assessed and adopted by the Civil Aviation Safety Authority (CASA) as Australia's national airworthiness authority. The legislation ensures that Australia adheres to international standards set by the Convention on International Civil Aviation, particularly concerning the responsibilities of the State of Design and the State of Registry for aircraft. The ADs, considered legislative instruments under the Legislative Instruments Act 2003, are typically issued in response to directives from the relevant State of Design, such as the United States Federal Aviation Administration (FAA) for certain aircraft types, and do not require public consultation or a Regulatory Impact Statement.

Scope and Application

The Civil Aviation Act 1988, as supplemented by the Civil Aviation Regulations 1998, governs the issuance of airworthiness directives (ADs) within Australia, ensuring the safety and continued airworthiness of aircraft registered in the country. Under this Act, the Civil Aviation Safety Authority (CASA) has the authority to issue ADs for specific types of aircraft or aeronautical products, as outlined in regulation 39.001. These ADs are considered legislative instruments under the Legislative Instruments Act 2003. The scope of the ADs extends to mandating compliance with airworthiness requirements set by the State of Design and adopted by Australia, as per Annex 8 of the Convention on International Civil Aviation. This includes issuing Australian ADs in response to ADs issued by the United States Federal Aviation Administration (FAA) for aircraft such as the Boeing 737, which are registered in Australia. The ADs are applicable to all aircraft of the specified type registered in Australia and must be adhered to by the aircraft operators and owners. Exemptions or thresholds for the applicability of these directives are not specified within the text, but the regulations are designed to ensure that the highest safety standards are maintained for all aircraft operating in Australian airspace.

Key Provisions

The main operative sections of the Civil Aviation Act 1988, specifically section 98, empower the Governor-General to make regulations aimed at ensuring the safety of air navigation. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 enables the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. Under subregulation 39.001(5), these ADs are classified as disallowable instruments under section 46A of the Acts Interpretation Act 1901 and, therefore, as legislative instruments as per section 6 of the Legislative Instruments Act 2003. The obligations imposed by the Act and the accompanying regulations on parties and entities primarily revolve around the continuing airworthiness of aircraft. 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 and must furnish necessary information to States of Registry to ensure compliance. In Australia, CASA, as the national airworthiness authority, is tasked with assessing and, if necessary, issuing ADs to implement the requirements of the State of Design. This is particularly relevant when an AD from a State of Design affects aircraft registered in Australia, as CASA must evaluate and potentially issue corresponding Australian ADs to maintain airworthiness standards. The regulations also specify that the State of Registry is responsible for the ongoing airworthiness of individual aircraft, necessitating the development or adoption of requirements to ensure this. This obligation extends to ensuring that any ADs issued by the State of Design are assessed and enforced within the jurisdiction. Consequently, when a State of Design issues an AD, such as the US FAA’s AD 2005-08-10 for Boeing 737 model aircraft, CASA must evaluate the AD and issue an Australian AD, such as AD/B737/244, to mandate the required measures. In terms of breaches and consequences, the regulations do not specify particular offences or penalties within the text provided. However, the nature of ADs as legislative instruments suggests that non-compliance could result in legal consequences. Given that ADs are critical for maintaining airworthiness and safety, failure to adhere to them could lead to severe civil or criminal penalties, including fines or other sanctions. The maximum penalties would depend on the specific circumstances and applicable aviation laws.

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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.