AD/B737/346 - Cabin Altitude Warning Takeoff Briefing

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Legislation au F2008L04349 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 United States FAA has issued AD 2008-23-07 affecting Boeing 737 model aircraft.  The United States is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/B737/346, which will become effective on
25 November 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, Systems and New Technologies in the Airworthiness Engineering Group, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988 was enacted to provide a framework for the regulation of civil aviation in Australia, aiming to ensure safety and efficiency in air navigation. This Act empowers the Governor-General to make regulations necessary for the safety of air navigation, including the issuance of airworthiness directives (ADs) under regulation 39.001 of the Civil Aviation Safety Regulations 1998. The objective of these regulations is to mandate the continuing airworthiness of aircraft and aeronautical products, thereby safeguarding the public and promoting international aviation safety standards. In accordance with Annex 8 to the Convention on International Civil Aviation, the State of Design holds the primary responsibility for the continuing airworthiness of an aircraft type, while the State of Registry is tasked with ensuring the ongoing airworthiness of individual aircraft. The Civil Aviation Safety Authority (CASA), as Australia's national airworthiness authority, is responsible for assessing information from the State of Design and issuing corresponding ADs to enforce necessary requirements. This legislative framework ensures that Australian aviation practices align with international safety standards and obligations.

Scope and Application

The Civil Aviation Act 1988, as supplemented by the Civil Aviation Safety Regulations 1998, applies to the issuance of airworthiness directives (ADs) for ensuring the safety of aircraft and aeronautical products. Specifically, under regulation 39.001 of the Civil Aviation Safety Regulations 1998, the Civil Aviation Safety Authority (CASA) is empowered to issue ADs for specific kinds of aircraft or aeronautical products. These ADs serve as legislative instruments, disallowable under the Acts Interpretation Act 1901, and are created in accordance with the Legislative Instruments Act 2003. The ADs are mandated by Australia's obligations under Annex 8 to the Convention on International Civil Aviation, which delineates the responsibilities of the State of Design and the State of Registry regarding the continuing airworthiness of aircraft. In this context, CASA, as the national airworthiness authority, must issue Australian ADs if they are appropriate, in response to ADs issued by the State of Design. For instance, following the issuance of an AD by the United States Federal Aviation Administration (FAA) for Boeing 737 model aircraft, CASA assessed the information and issued an Australian AD, which became effective on 25 November 2008. Given that these ADs are issued in response to international obligations and do not require consultation with the Australian public, they do not necessitate a Regulatory Impact Statement.

Key Provisions

The Civil Aviation Act 1988, as supplemented by the Civil Aviation Safety Regulations 1998, allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) (sections 98 and 39.001). An AD is a legislative instrument (section 6 of the Legislative Instruments Act 2003) and is designed to ensure the continuing airworthiness of aircraft types and aeronautical products. According to Annex 8 to the Convention on International Civil Aviation, the State of Design has the overarching responsibility for the airworthiness of an aircraft type and must provide necessary information to ensure it. The State of Registry, in this case Australia, must develop or adopt requirements to ensure the continuing airworthiness of aircraft registered within its jurisdiction. When a State of Design issues an AD, CASA must assess the information and, if necessary, issue an Australian AD to enforce the requirements of the State of Design. For instance, the United States Federal Aviation Administration (FAA) has issued AD 2008-23-07 for Boeing 737 model aircraft, and CASA has issued Australian AD/B737/346, which will take effect on 25 November 2008. The Civil Aviation Safety Regulations 1998 impose several obligations on CASA and other entities involved in the regulation and maintenance of aircraft. CASA must assess any ADs issued by the State of Design and, where appropriate, issue corresponding Australian ADs to ensure compliance with international standards and the safety of air navigation. The State of Registry, in this case Australia, is responsible for ensuring the continuing airworthiness of aircraft registered within its jurisdiction, and this includes complying with ADs issued by CASA. Aircraft operators must also comply with ADs by implementing the required maintenance, repair, or operational changes as specified in the directives. Violations of the provisions of ADs can lead to various civil and criminal consequences. Non-compliance with an AD may result in the grounding of an aircraft, which can have significant financial implications for airlines and other operators. Under the Civil Aviation Act 1988, failure to comply with an AD can be considered an offence, leading to potential criminal charges. The maximum penalties for such offences can include substantial fines and imprisonment. Additionally, CASA has the authority to take enforcement action, which can include the revocation of an aircraft’s certificate of airworthiness, further compounding the financial and operational consequences for non-compliant operators.

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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.