AD/DHC-8/140 - Elevator Overload Bungee

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Legislation au F2008L00781 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.

Transport Canada has issued AD CF-2007-30 affecting Bombardier DHC-8 series aircraft.  Canada is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/DHC-8/140, which will become effective on 10 April 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 Acting Manager, Systems and New Technologies in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988 was enacted to establish a framework for the regulation of civil aviation in Australia, with a primary focus on ensuring the safety of air navigation. This Act empowers the Governor-General to create regulations that serve the interests of safety, and it is within this legislative authority that the Civil Aviation Safety Regulations 1998 were established. These regulations, particularly under regulation 39.001, allow the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products, thereby mandating compliance with safety standards. This regulatory approach is consistent with international standards set by the Convention on International Civil Aviation, which designates the State of Design as responsible for the continuing airworthiness of an aircraft type, with States of Registry ensuring the airworthiness of individual aircraft. The issuance of airworthiness directives, as specified under the Civil Aviation Safety Regulations, is a legislative instrument governed by the Legislative Instruments Act 2003. Notably, ADs do not require public consultation due to their alignment with international obligations and the immediate nature of safety concerns they address. The process for issuing these directives, such as the Australian AD/DHC-8/140 in response to a Canadian directive, is overseen by CASA, which acts in accordance with the provisions of the Civil Aviation Act. The enactment of such directives underscores the importance of harmonising national safety regulations with international standards to maintain the highest levels of aviation safety.

Scope and Application

The Civil Aviation Act 1988, through the Civil Aviation Safety Regulations 1998, empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) which are legislative instruments under the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. These ADs apply to the kinds of aircraft or aeronautical products as stipulated in regulation 39.001 of the Civil Aviation Safety Regulations 1998. The ADs are intended to ensure the safety of air navigation and are issued in compliance with Annex 8 to the Convention on International Civil Aviation, which assigns the State of Design overall responsibility for the continuing airworthiness of an aircraft type. In Australia, the State of Registry is tasked with ensuring the continuing airworthiness of individual aircraft and must develop or adopt requirements to this effect. When a State of Design issues an AD, CASA must assess the information and, if appropriate, issue an Australian AD to enforce the requirements of the State of Design. For instance, Transport Canada’s AD CF-2007-30, concerning Bombardier DHC-8 series aircraft, has been assessed by CASA, resulting in the issuance of Australian AD/DHC-8/140, which will take effect on 10 April 2008. Given that these ADs are issued in response to international obligations and requirements, there is no consultation of the Australian public, and they do not necessitate a Regulatory Impact Statement. The ADs are made by authorised personnel within CASA in accordance with section 84A(2) of the Act.

Key Provisions

The Civil Aviation Act 1988, specifically under section 98, empowers the Governor-General to create regulations that are in the interests of air navigation safety. Complementing this, regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. An AD is a legislative instrument, as stated in subregulation 39.001(5) of the Civil Aviation Safety Regulations 1998, and it is subject to disallowance under section 46A of the Acts Interpretation Act 1901. This legislative instrument approach is further supported by section 6 of the Legislative Instruments Act 2003. Under Annex 8 to the Convention on International Civil Aviation, the State of Design holds primary responsibility for the continuing airworthiness of an aircraft type and must provide necessary information to the States of Registry to ensure that the aircraft type maintains its airworthiness. In practical terms, this means that when the State of Design issues an AD, the State of Registry, in this case CASA as Australia's national airworthiness authority, must assess this information and, if necessary, issue an Australian AD that enforces the State of Design's requirements. This process ensures that Australian-registered aircraft meet international safety standards. CASA's obligations under the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 include assessing ADs issued by the State of Design and determining whether they should be implemented in Australia. When CASA issues an Australian AD, it must ensure that it aligns with the international AD and that it mandates the necessary safety measures for the aircraft in question. This process is rigorous and involves detailed technical assessments to guarantee that Australian aircraft remain safe and compliant with international standards. Breaches of the provisions in the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 can lead to severe civil and criminal penalties. For instance, operating an aircraft that does not comply with an AD can result in fines and imprisonment, as these regulations are designed to maintain the highest safety standards in aviation. The specific penalties, including maximum fines and imprisonment terms, are determined by the severity of the breach and the potential impact on aviation safety. CASA is tasked with enforcing these regulations, and non-compliance can result in significant legal and financial consequences for the offending parties.

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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.