AD/DHC-8/143 - Nose Landing Gear Electrical Harness

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Legislation au F2008L03366 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-2008-22 affecting Bombardier DHC-8-400 series aircraft.  Canada is the State of Design for these types.  CASA has assessed this AD and has issued Australian AD/DHC-8/143, which will become effective on 25 September 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, enacted by the Parliament of Australia, aims to ensure the safety of air navigation by providing a legislative framework governing civil aviation activities within Australia. In line with the policy objective of maintaining high safety standards, the Act empowers the Governor-General to create regulations, such as the Civil Aviation Safety Regulations 1998. These regulations, in turn, enable the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific aircraft types or aeronautical products, as outlined in regulation 39.001 of the Civil Aviation Safety Regulations 1998. In accordance with international standards, Australia’s State of Registry is responsible for ensuring the continuing airworthiness of aircraft registered in Australia, while the State of Design retains the overarching responsibility for the type’s airworthiness. Therefore, when a State of Design issues an AD, CASA, as Australia’s national airworthiness authority, must assess the information and, if necessary, issue an Australian AD to enforce the State of Design’s requirements.

Scope and Application

The Civil Aviation Safety Regulations 1998, pursuant to the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specified types of aircraft or aeronautical products. These ADs serve as legislative instruments that mandate safety measures and are integral to ensuring the continuing airworthiness of aircraft, aligning with international standards set forth in Annex 8 to the Convention on International Civil Aviation. The ADs are typically issued in response to directives from the State of Design, which holds responsibility for the aircraft type, and require CASA to assess and, if necessary, implement corresponding Australian ADs to meet these international obligations. As such, these directives apply to aircraft registered in Australia, and CASA, acting as the national airworthiness authority, ensures compliance with safety regulations. The application of these ADs does not necessitate public consultation or a Regulatory Impact Statement, reflecting their alignment with established international standards and their focus on mandatory safety requirements.

Key Provisions

The Civil Aviation Act 1988, and specifically section 98, empowers the Governor-General to enact regulations for the purpose of ensuring the safety of air navigation. This legislative framework allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) as stipulated under regulation 39.001 of the Civil Aviation Safety Regulations 1998. Section 39.001(5) further clarifies that these ADs are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901 and are thus classified as legislative instruments in accordance with section 6 of the Legislative Instruments Act 2003. The ADs are a pivotal tool for maintaining the continuing airworthiness of aircraft, as mandated by Annex 8 to the Convention on International Civil Aviation, which assigns the State of Design with the primary responsibility for an aircraft type's airworthiness and requires it to furnish necessary information to the States of Registry. Under the Civil Aviation Safety Regulations 1998, CASA is tasked with the responsibility of assessing ADs issued by other countries' aviation authorities and determining whether these should be adopted as Australian ADs. When an AD is issued by the State of Design, such as Transport Canada issuing AD CF-2008-22 for Bombardier DHC-8-400 series aircraft, CASA must review the directive and, if deemed necessary, issue a corresponding Australian AD. This process was followed for AD CF-2008-22, resulting in the issuance of Australian AD/DHC-8/143, which is set to become effective on 25 September 2008. Given that this AD is issued in response to international obligations and the directive from the relevant State of Design, no public consultation has been required. Additionally, the Office of Best Practice Regulation has concluded that ADs do not necessitate a Regulatory Impact Statement. The obligations imposed by the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 on CASA include the assessment and potential adoption of ADs issued by other countries to ensure the continuing airworthiness of aircraft registered in Australia. CASA must act promptly to issue corresponding Australian ADs when necessary, maintaining alignment with international standards and obligations under the Convention on International Civil Aviation. The Act also imposes on CASA the responsibility of ensuring that any ADs issued are in accordance with the legislative framework and have undergone the requisite assessment process. The ADs themselves impose obligations on aircraft operators to comply with the directives to ensure the continued airworthiness of their aircraft. Failure to comply with an AD can result in serious consequences under the Civil Aviation Act 1988. Civil penalties can be imposed for non-compliance, and in severe cases, criminal charges may be brought against individuals or corporations. The maximum penalties for offences under the Act can be substantial, reflecting the critical importance of air safety and the potential ramifications of non-compliance. The Act provides for both civil and criminal penalties, with the specifics depending on the nature and severity of the breach. These provisions underscore the importance of adherence to airworthiness directives and the potential legal ramifications for failing to comply with them.

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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.