AD/DHC-8/114 - Pitch Trim Control

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Legislation au F2006L00756 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 Transport Canada has issued AD CF-2002-25 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-8/114, which will become effective on 13 April 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 was enacted to provide a legal framework for the regulation of civil aviation in Australia, addressing the need for a comprehensive set of laws governing air navigation, aircraft safety, and operational standards. One of the key mechanisms through which this legislation ensures safety is through the issuance of airworthiness directives (ADs). Under section 98 of the Act, the Governor-General has the authority to make regulations for the safety of air navigation, with the Civil Aviation Safety Regulations 1998 providing further detail on the issuance of ADs by the Civil Aviation Safety Authority (CASA). These ADs, which are legislative instruments under the Legislative Instruments Act 2003, are designed to ensure the continuing airworthiness of aircraft and aeronautical products in accordance with international standards set out in the Convention on International Civil Aviation. CASA, acting as Australia's national airworthiness authority, is mandated to issue ADs in response to directives from the State of Design or based on its own assessment, ensuring alignment with international obligations and maintaining the safety standards of Australian-registered aircraft.

Scope and Application

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the legislative framework for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). According to section 98 of the Civil Aviation Act 1988, the Governor-General has the authority to make regulations for the safety of air navigation, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers CASA to issue ADs for types of aircraft or aeronautical products. These directives are considered legislative instruments under the Legislative Instruments Act 2003. The application of these directives is informed by international standards, particularly Annex 8 to the Convention on International Civil Aviation, which assigns the State of Design the responsibility for the continuing airworthiness of an aircraft type and mandates that it provide necessary information to the States of Registry. In Australia, CASA, as the national airworthiness authority, must assess any ADs issued by States of Design and, if appropriate, issue corresponding Australian ADs to ensure compliance with international safety standards. The jurisdictional reach of these directives is national, affecting all aircraft and aeronautical products registered in Australia, and they are issued without public consultation due to their basis in international obligations and specific safety requirements.

Key Provisions

The main operative sections of the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 pertain to the issuance of airworthiness directives (ADs) under section 98 and regulation 39.001, respectively. Section 98 of the Civil Aviation Act 1988 empowers the Governor-General to create regulations aimed at ensuring the safety of air navigation. Meanwhile, regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. This regulatory framework ensures that safety measures are consistently implemented across the aviation industry. The obligations and requirements imposed by these sections primarily focus on the safety and airworthiness of aircraft. The State of Design, which is the country responsible for designing the aircraft, must provide necessary information to ensure the continuing airworthiness of the aircraft type. The State of Registry, which is the country where the aircraft is registered, must then develop or adopt requirements to ensure the aircraft's ongoing airworthiness. In the context of Australia, CASA, as the national airworthiness authority, is tasked with assessing information from the State of Design and issuing appropriate ADs to mandate necessary safety measures. This collaborative approach ensures that all aircraft, regardless of where they are registered, adhere to internationally recognised safety standards. The legislation also outlines the consequences for breaches related to airworthiness directives. While the specific provisions of the Civil Aviation Act 1988 and Civil Aviation Safety Regulations 1998 do not detail offences or penalties for non-compliance with ADs, it is reasonable to infer that failing to adhere to these directives could result in serious safety violations. Such violations might attract criminal or civil penalties under other sections of the Act or related legislation, such as fines or imprisonment, as these are common consequences for non-compliance with aviation safety regulations. The exact penalties would depend on the nature and severity of the breach, as well as other relevant laws. The issuance of airworthiness directives under the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 is a critical component of maintaining aviation safety. By delegating the authority to issue ADs to CASA, the legislation ensures that safety measures are consistently applied and enforced. This systematic approach, supported by international agreements like the Convention on International Civil Aviation, helps to maintain high safety standards across the global 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.