AD/HU 369/120 - Tail Rotor Blade Abrasion Strip

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Legislation au F2008L03052 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 US FAA has issued AD 2008-15-03 affecting MD Helicopters Inc. model 369 helicopters.  The USA is the State of Design for this type.  CASA has assessed this AD and has issued Australian AD/HU 369/120, which will become effective on 3 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, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Commonwealth Parliament, serves to regulate the safety and efficiency of civil aviation within Australia. The Act empowers the Governor-General to create regulations that ensure the safety of air navigation. One of the key regulatory tools under this Act is the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA), as stipulated in regulation 39.001 of the Civil Aviation Safety Regulations 1998. ADs are legislative instruments that address specific safety concerns for particular types of aircraft or aeronautical products, with the overarching aim of maintaining the continuing airworthiness of aircraft as mandated by international agreements such as Annex 8 to the Convention on International Civil Aviation. This legislative framework ensures that Australia complies with its international obligations and maintains high safety standards in civil aviation.

Scope and Application

The Civil Aviation Act 1988, supplemented by the Civil Aviation Safety Regulations 1998, facilitates the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA) for specific kinds of aircraft or aeronautical products. Under regulation 39.001, CASA is empowered to issue these ADs, which are legislative instruments, to ensure the safety of air navigation as stipulated in section 98 of the Act. The issuance of ADs is integral to fulfilling Australia's commitments under the Convention on International Civil Aviation, particularly Annex 8, which delineates the State of Design's responsibility for the continuing airworthiness of aircraft types and mandates the provision of necessary information to States of Registry. CASA, acting as Australia's national airworthiness authority, is obligated to assess the information provided by the State of Design and, where necessary, issue corresponding Australian ADs. These directives must be enforced to mandate the safety requirements set by the State of Design, ensuring that Australian-registered aircraft meet international safety standards. The ADs are issued without public consultation due to their alignment with international obligations and are not subject to a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation.

Key Provisions

The Civil Aviation Act 1988, specifically section 98, allows the Governor-General to create regulations to ensure the safety of air navigation. This authority is exercised through regulation 39.001 of the Civil Aviation Safety Regulations 1998, which empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. Section 39.001(5) of these regulations further clarifies that ADs are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901, and thus, they are legislative instruments as per section 6 of the Legislative Instruments Act 2003. These airworthiness directives are critical for maintaining the safety and airworthiness of aircraft. According to Annex 8 of the Convention on International Civil Aviation, the State of Design, which is the country where the aircraft is designed, has the primary responsibility for ensuring the ongoing airworthiness of an aircraft type. This includes providing necessary information to other states, known as States of Registry, to maintain the airworthiness of the aircraft. The State of Registry, where the aircraft is registered, is also responsible for ensuring the continuing airworthiness of individual aircraft and must implement measures to meet these requirements. When a State of Design issues an AD for a type of aircraft registered in Australia, CASA must review the information and, if necessary, issue an Australian AD to enforce the requirements specified by the State of Design. In this specific case, the US Federal Aviation Administration (FAA) issued AD 2008-15-03 for MD Helicopters Inc. model 369 helicopters, with the USA being the State of Design for this aircraft type. CASA has evaluated this AD and issued Australian AD/HU 369/120, effective from 3 September 2008. Given that this AD is issued in response to international obligations and a directive from the relevant State of Design, no public consultation was required. Additionally, the Office of Best Practice Regulation has confirmed that ADs do not necessitate a Regulatory Impact Statement. The AD was made by the Manager, Airframes, in the Airworthiness Engineering Branch on behalf of CASA, in compliance with subsection 84A(2) of the Act. The obligations imposed by these regulations include a thorough review and potential issuance of Australian ADs by CASA when required by international obligations. Any breaches of these requirements can lead to significant consequences. While specific offences and penalties are not detailed in the provided text, non-compliance with airworthiness directives can result in severe penalties, including fines, suspension of airworthiness certificates, or other regulatory actions. The safety and compliance with these directives are paramount, as they are directly tied to the ongoing airworthiness of aircraft and the safety of air navigation.

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Aviation Law
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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.