AD/DAUPHIN/95 - Main Rotor Gearbox Casing - Corrosion

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Legislation au F2008L01647 Not in force Legislative Instrument

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CIVIL AVIATION ACT 1988

CIVIL AVIATION 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.  An AD is a disallowable instrument under section 46A of the Acts Interpretation Act 1901.

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 French DGAC has issued Emergency AD UF-2008-004 affecting SA365 and AS365 Series rotorcraft.  France is the State of Design for these types.  CASA has assessed this AD and has issued Australian AD/DAUPHIN/ 95, which will become effective on 19 May 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 Regulatory Review has determined that ADs do not require a Regulatory Impact Statement.

The AD has been made by the Acting Section Head - Airframes, Airworthiness Standards Branch, Standards Division, on behalf of CASA, in accordance with subsection 84A (2) of the Act. 

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, provides the legal framework for ensuring the safety of air navigation within Australia. It empowers the Governor-General to create regulations in the interests of safety, with the Civil Aviation Safety Regulations 1998 further detailing how these regulations are to be implemented. One significant aspect of this Act is its alignment with international standards, particularly under Annex 8 of the Convention on International Civil Aviation, which places the responsibility of continuing airworthiness on the State of Design. In response to this international obligation, the Civil Aviation Safety Authority (CASA) is authorised to issue airworthiness directives (ADs) to mandate safety requirements for aircraft registered in Australia. These ADs are critical in ensuring that Australian-registered aircraft meet the necessary safety standards as determined by the respective State of Design. This legislative framework ensures that CASA, as Australia's national airworthiness authority, can effectively respond to international safety directives and maintain the high safety standards expected in Australian aviation.

Scope and Application

The Civil Aviation Act 1988, supported by the Civil Aviation Regulations 1998, provides the legislative framework under which airworthiness directives (ADs) can be issued in Australia, ensuring that the safety of air navigation is maintained. Under section 98 of the Act, the Governor-General has the authority to make regulations necessary for the safety of air navigation, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specific kinds of aircraft or aeronautical products. These directives are issued in accordance with Annex 8 to the Convention on International Civil Aviation, which stipulates that the State of Design is responsible for the continuing airworthiness of an aircraft type and must provide necessary information to ensure this. CASA, as Australia’s national airworthiness authority, is mandated to assess this information and, if necessary, issue Australian ADs to enforce the requirements set by the State of Design. This ensures that aircraft registered in Australia meet international safety standards, thereby safeguarding the continuing airworthiness of these aircraft.

Key Provisions

The Civil Aviation Act 1988, particularly section 98, empowers the Governor-General to establish regulations aimed at ensuring the safety of air navigation. These regulations can cover a broad range of areas within the realm of civil aviation, with the ultimate goal of maintaining high safety standards. Regulation 39.001 of the Civil Aviation Safety Regulations 1998 specifically allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for particular types of aircraft or aeronautical products. This authority is exercised to ensure that all aircraft and aeronautical products meet the necessary safety standards, thereby safeguarding public safety and air navigation efficiency. Airworthiness directives are issued in accordance with international standards set out in Annex 8 to the Convention on International Civil Aviation. According to this Annex, the State of Design, which is the country where the aircraft type was originally designed, has the overarching responsibility for the continuing airworthiness of the aircraft type. This State of Design must provide all necessary information to other States of Registry to ensure the continued airworthiness of the aircraft type. The State of Registry, which is the country where the aircraft is registered, is also responsible for ensuring the continuing airworthiness of individual aircraft. This involves developing or adopting specific requirements to maintain airworthiness. When a State of Design issues an AD for a type of aircraft registered in Australia, CASA must assess this information and, if deemed necessary, issue an Australian AD to enforce the requirements of the State of Design. The obligations imposed by these regulations on CASA and other relevant authorities are substantial. CASA, as Australia's national airworthiness authority, must rigorously assess any foreign ADs that pertain to aircraft types registered in Australia. If an AD is issued by a foreign State of Design, such as the French DGAC's Emergency AD UF-2008-004 for SA365 and AS365 Series rotorcraft, CASA must evaluate this directive to determine its applicability and necessity for Australian-registered aircraft. If CASA determines that the AD is appropriate, they must issue a corresponding Australian AD, such as AD/DAUPHIN/95, which ensures that the safety requirements are met by Australian operators. This process is mandated by international conventions and is critical for maintaining consistent safety standards across the global aviation community. There are specific consequences for non-compliance with airworthiness directives. Failure to adhere to the requirements set out in an AD can result in serious safety risks, leading to potential accidents or incidents. While the specific penalties for non-compliance are not detailed in the text, it is clear that the issuing of ADs and the subsequent enforcement of these directives are critical components of maintaining air safety. Non-compliance can result in both civil and criminal consequences, depending on the severity of the breach and its impact on safety. The enforcement of ADs is a vital part of ensuring that all aircraft meet the necessary safety standards, thereby protecting both the aviation industry and the public.

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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.