AD/J4100/17 - Nose Fuselage Structure between Station 4 and Station 11

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Legislation au F2008L00506 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 UK CAA has issued AD 001-06-2001 affecting BAe Jetstream 4100 model aircraft.  The UK is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/J4100/17, which will become effective on 20 February 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 by the Commonwealth Parliament, is a foundational piece of legislation that governs civil aviation in Australia. This Act provides the legal framework for ensuring the safety and efficiency of civil aviation operations within Australia and its territories. The Act addresses the need to regulate the civil aviation sector comprehensively to safeguard public interest and comply with international standards set by the International Civil Aviation Organization (ICAO). The Act empowers the Civil Aviation Safety Authority (CASA) to issue regulations and directives to maintain airworthiness and safety standards. The Civil Aviation Safety Regulations 1998, made under the Act, further detail the requirements for maintaining airworthiness, including the issuance of airworthiness directives (ADs) by CASA. These regulations are designed to ensure that aircraft and aeronautical products meet safety standards and to mandate corrective actions when safety issues are identified. The ADs are crucial in maintaining the continuing airworthiness of aircraft and are issued in response to safety concerns identified by the State of Design or other international authorities.

Scope and Application

The Civil Aviation Act 1988, along with the Civil Aviation Safety Regulations 1998, establishes a framework for ensuring the safety of air navigation within Australia. Specifically, regulation 39.001 of these regulations empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. Such directives are legislative instruments, subject to disallowance and oversight as per the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. ADs are integral to maintaining the continuing airworthiness of aircraft, a responsibility ultimately falling on the State of Registry for individual aircraft and the State of Design for aircraft types. In the case of BAe Jetstream 4100 model aircraft, following the UK Civil Aviation Authority's issuance of AD 001-06-2001, CASA assessed the directive and subsequently issued Australian AD/J4100/17, reflecting Australia's obligations under the Convention on International Civil Aviation. This directive, mandated to become effective on 20 February 2008, has been issued without public consultation or the need for a Regulatory Impact Statement, as per regulatory best practices.

Key Provisions

The Civil Aviation Act 1988, through section 98, empowers the Governor-General to create regulations that ensure the safety of air navigation. These regulations are instrumental in maintaining the highest standards of aviation safety across the country. Section 39.001 of the Civil Aviation Safety Regulations 1998 further details that the Civil Aviation Safety Authority (CASA) has the authority to issue airworthiness directives (ADs) concerning specific types of aircraft or aeronautical products. This provision ensures that all stakeholders are informed about any safety issues and the necessary corrective actions. Under subregulation 39.001(5) of the Civil Aviation Safety Regulations 1998, an AD is classified as a disallowable instrument, according to section 46A of the Acts Interpretation Act 1901. This means that while ADs are legislative instruments, they can be subject to disallowance by either House of Parliament. Moreover, these directives are made pursuant to international obligations, specifically under Annex 8 to the Convention on International Civil Aviation. Here, the State of Design holds the primary responsibility for the continuing airworthiness of an aircraft type, and must provide essential information to ensure safety. The State of Registry, in this case CASA, must then assess this information and, if necessary, issue a corresponding AD to enforce the safety requirements. The obligations imposed by these regulations are significant. For example, the State of Design must ensure that any necessary information for maintaining airworthiness is provided to the relevant State of Registry. In Australia, CASA must rigorously assess this information and, if it deems the safety measures necessary, issue a corresponding AD. The AD must be issued in line with subsection 84A(2) of the Act, which ensures that the directive is made by an authorised official within CASA. The ADs are not subject to public consultation due to their international obligations and the nature of the safety measures they aim to enforce. Failure to comply with an AD can lead to severe consequences. Civil aviation law imposes strict penalties for non-compliance, which may include fines and imprisonment. For instance, if an aircraft operator fails to adhere to an AD, CASA can issue a penalty notice or take legal action. The severity of the penalty depends on the nature of the breach and can include significant financial penalties. Moreover, non-compliance can result in the suspension or revocation of an aircraft's airworthiness certificate, effectively grounding the aircraft until the required actions are taken. These stringent measures underscore the importance of adhering to ADs to ensure the safety and integrity of the aviation industry.

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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.