AD/DHC-8/125 - Main Landing Gear Shock Strut Piston

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Legislation au F2006L02225 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-2006-14 affecting Bombardier DHC-8 series aeroplanes.  Canada is the State of Design for these types.  CASA has assessed this AD and has issued Australian AD/DHC-8/125 which will become effective on 3 August 2006.

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 Regulatory Review has determined that ADs do not require a Regulatory Impact Statement.

The AD has been made by the Manager, new Technologies and Systems, in the Manufacturing, Certification and New Technologies Office, 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, is designed to ensure the safety and efficiency of civil aviation within Australia. This Act empowers the Governor-General to make regulations, including the issuance of airworthiness directives (ADs), under section 98, with the overarching aim of enhancing the safety of air navigation. In line with Annex 8 to the Convention on International Civil Aviation, the Act delineates responsibilities for continuing airworthiness between the State of Design and the State of Registry, with CASA acting as Australia’s national airworthiness authority. For instance, when Canada, as the State of Design, issues an AD for Bombardier DHC-8 series aeroplanes, CASA evaluates the AD and, if necessary, issues a corresponding Australian AD to ensure compliance with international standards. This process exemplifies the Act's objective to align Australian aviation safety practices with international obligations, ensuring that aircraft registered in Australia meet global safety standards.

Scope and Application

The Civil Aviation Safety Regulations 1998, under the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) to ensure the safety of air navigation. These regulations apply to all aircraft and aeronautical products registered in Australia and are mandated by the State of Registry, which in this case is CASA. The scope of these directives is broad, encompassing all types of aircraft and their components, and is aimed at maintaining the continuing airworthiness of these entities as per international standards set by the Convention on International Civil Aviation. These ADs are legislative instruments that are issued without the need for public consultation or a Regulatory Impact Statement, as they are based on international obligations and the assessments of the State of Design. The ADs are issued by CASA to reflect directives from other countries, ensuring that Australian-registered aircraft comply with international safety standards. The ADs are specific to the types of aircraft they pertain to, and any exemptions or exclusions would be detailed within the AD itself or in related subordinate instruments issued by CASA.

Key Provisions

The key operative sections of the Civil Aviation Safety Regulations 1998 under consideration here pertain primarily to the issuance and enforcement of airworthiness directives (ADs) as per regulation 39.001. This regulation empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. Such ADs are essential for maintaining the continuing airworthiness of aircraft, which is a fundamental safety requirement. Section 39.001(5) of the Regulations clarifies that these ADs are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901 and are thus legislative instruments. These ADs impose several obligations on the parties they govern. Firstly, the State of Design, which is responsible for the continuing airworthiness of an aircraft type, must provide necessary information to ensure airworthiness. This obligation extends to offering information to the appropriate States of Registry, which include Australia. CASA, as Australia’s national airworthiness authority, has the duty to assess the information from the State of Design and, if necessary, issue an Australian AD to enforce the requirements of the State of Design. This ensures that the ADs issued by other states, such as Canada in the case of Bombardier DHC-8 series aeroplanes, are appropriately adopted and enforced within Australia. Any breach of the requirements set out in these ADs can lead to severe consequences. The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 do not explicitly detail the penalties for non-compliance with ADs; however, general provisions within the Act can be invoked for breaches of safety regulations. Non-compliance could potentially lead to administrative penalties, including fines and other civil or criminal sanctions. In serious cases, such breaches might also result in prosecution under the common law or other statutory provisions, leading to more severe penalties such as imprisonment, depending on the gravity of the violation and its impact on aviation safety. Overall, these regulations and the associated ADs are designed to ensure the highest standards of aviation safety by mandating compliance with airworthiness requirements. This not only protects the public but also aligns with international obligations under the Convention on International Civil Aviation, particularly the responsibilities of States of Design and Registry.

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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.