AD/B737/326 - Engine Strut Aft Fairing Drain Tube Assembly

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Legislation au F2008L01517 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 2008-08-24 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/B737/326, which will become effective on 5 June 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 in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted to provide a legal framework for the regulation of civil aviation in Australia, includes provisions for ensuring the safety and continuing airworthiness of aircraft. This Act empowers the Governor-General to make regulations for the purposes of the Act, particularly under section 98, which is aimed at safeguarding air navigation. One such regulation, 39.001 of the Civil Aviation Safety Regulations 1998, allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for certain types of aircraft or aeronautical products. This mechanism is integral to maintaining the safety standards as outlined in Annex 8 of the Convention on International Civil Aviation, where the State of Design holds the responsibility for the continuing airworthiness of an aircraft type. CASA, as Australia's national airworthiness authority, must ensure compliance with these international standards by assessing and, if necessary, issuing Australian ADs in response to those issued by the relevant State of Design. In this context, CASA has issued Australian AD/B737/326 in response to the US Federal Aviation Administration's AD 2008-08-24 for Boeing B737 model aircraft, reflecting Australia's commitment to international aviation safety protocols.

Scope and Application

The Civil Aviation Act 1988 and its accompanying Civil Aviation Safety Regulations 1998 empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products under regulation 39.001. These ADs, which are legislative instruments as defined under section 46A of the Acts Interpretation Act 1901, serve to ensure the continuing airworthiness of aircraft registered in Australia, aligning with the obligations outlined in Annex 8 to the Convention on International Civil Aviation. The State of Design, such as the United States for Boeing B737 aircraft, holds primary responsibility for issuing ADs based on safety concerns, while Australia, as the State of Registry, must assess these directives and, if necessary, issue corresponding Australian ADs. This process ensures that all aircraft registered in Australia meet the required safety standards as set forth by international conventions, without necessitating public consultation or a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation. The ADs are issued by CASA, under the authority granted by the Civil Aviation Act, ensuring compliance with international safety standards and domestic regulations.

Key Provisions

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legislative framework for airworthiness directives (ADs). Under section 98 of the Civil Aviation Act 1988, the Governor-General has the authority to make regulations that promote the safety of air navigation. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. Subregulation 39.001(5) classifies ADs as disallowable instruments under the Acts Interpretation Act 1901, making them legislative instruments as per section 6 of the Legislative Instruments Act 2003. The obligations imposed by this legislation are significant. The State of Design, which is the country where the aircraft type is designed, must ensure the continuing airworthiness of the aircraft type and provide necessary information to the States of Registry. The States of Registry, including Australia, are responsible for the continuing airworthiness of individual aircraft and must develop or adopt requirements to maintain this airworthiness. When a State of Design issues an AD, such as the one issued by the US Federal Aviation Administration (FAA) for Boeing B737 model aircraft, CASA must assess this information and, if deemed necessary, issue an Australian AD to enforce the State of Design's requirements. Breach of an AD can result in severe consequences. Under section 126 of the Civil Aviation Act 1988, failure to comply with an AD can lead to criminal and civil penalties. The maximum penalties include substantial fines and imprisonment for individuals and corporations, reflecting the serious implications of non-compliance on aviation safety. CASA has the authority to enforce these regulations, and any violations can lead to enforcement actions, including grounding of aircraft and other punitive measures. Given the international nature of aviation, compliance with ADs is critical to ensuring consistent safety standards across jurisdictions.

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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.