AD/LC40/1 - Thermawing Deice System

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Legislation au F2006L04085 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 United States FAA has issued AD 2006-25-08 affecting Columbia Aircraft Manufacturing LC41-550FG and LC42-550FG model aircraft.  The United States is the State of Design for these types.  CASA has assessed this AD and has issued Australian AD/LC40/1, which will become effective on 14 December 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 comprehensive legal framework for civil aviation in Australia, addressing the need for regulations to ensure the safety of air navigation. This Act empowers the Governor-General to make regulations for the purposes of the Act, specifically under section 98, and delegates authority to the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) through regulation 39.001 of the Civil Aviation Safety Regulations 1998. These directives are legislative instruments subject to disallowance under section 46A of the Acts Interpretation Act 1901 and are governed by the Legislative Instruments Act 2003. The objective of the ADs is to comply with Australia's obligations under the Convention on International Civil Aviation, particularly Annex 8, which mandates that the State of Design must provide continuing airworthiness information to the States of Registry. This ensures that the State of Registry can develop or adopt necessary requirements to maintain the airworthiness of aircraft, as reflected in the issuance of AD/LC40/1 by CASA in response to an AD issued by the United States Federal Aviation Administration concerning Columbia Aircraft Manufacturing LC41-550FG and LC42-550FG models.

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) in Australia. These regulations empower the Civil Aviation Safety Authority (CASA) to issue ADs concerning specific types of aircraft or aeronautical products, as stipulated in regulation 39.001 of the Civil Aviation Safety Regulations 1998. An AD is considered a legislative instrument under the Legislative Instruments Act 2003, subject to disallowance as per the Acts Interpretation Act 1901. The issuance of ADs aligns with the international standards set by Annex 8 to the Convention on International Civil Aviation, which mandates that the State of Design has the overarching responsibility for the continuing airworthiness of aircraft types, while the State of Registry ensures the continuing airworthiness of individual aircraft. Consequently, when a State of Design, such as the United States, issues an AD affecting aircraft types registered in Australia, CASA must assess and, if necessary, issue a corresponding Australian AD. This ensures compliance with international obligations and maintains the safety standards of air navigation within Australia.

Key Provisions

The Civil Aviation Safety Regulations 1998, under regulation 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) concerning specific types of aircraft or aeronautical products. This regulatory authority stems from section 98 of the Civil Aviation Act 1988, which allows the Governor-General to make regulations for the Act’s purposes and in the interest of air navigation safety. Notably, subregulation 39.001(5) specifies that an AD is a disallowable instrument under the Acts Interpretation Act 1901, classifying it as a legislative instrument as per section 6 of the Legislative Instruments Act 2003. The overarching responsibility for the continuing airworthiness of an aircraft type lies with the State of Design, which must provide necessary information to the States of Registry, as mandated by Annex 8 to the Convention on International Civil Aviation. Consequently, ADs are a prevalent form of continuing airworthiness information disseminated by ICAO Contracting States, including Australia. The State of Registry of an individual aircraft bears the responsibility for ensuring the aircraft's ongoing airworthiness, in accordance with Annex 8. This entails developing or adopting requisite measures to maintain airworthiness. When a State of Design issues an AD for a type of aircraft registered in Australia, CASA must evaluate this information and, if necessary, issue an Australian AD to enforce the State of Design's requirements. Such was the case when the United States Federal Aviation Administration (FAA) issued AD 2006-25-08 affecting Columbia Aircraft Manufacturing LC41-550FG and LC42-550FG model aircraft. Given that the United States is the State of Design for these aircraft types, CASA assessed this AD and subsequently issued Australian AD/LC40/1, which took effect on 14 December 2006. Given that this AD is issued due to Australia’s obligations under the Convention on International Civil Aviation and in response to an AD from the relevant State of Design, no public consultation was required, and the Office of Regulatory Review determined that a Regulatory Impact Statement was unnecessary. The AD was issued by the Manager, New Technologies and Systems, in CASA's Manufacturing, Certification and New Technologies Office, in line with subsection 84A(2) of the Act. The Civil Aviation Safety Regulations 1998 impose several obligations on the entities they govern. Firstly, CASA must assess any AD issued by a State of Design for aircraft types registered in Australia and determine if an Australian AD is necessary. CASA is mandated to issue such ADs to ensure compliance with international safety standards. Additionally, the State of Registry must develop or adopt appropriate requirements to maintain the continuing airworthiness of aircraft, ensuring that all safety measures mandated by ADs are implemented. The regulations also place an obligation on aircraft operators to comply with all ADs relevant to their aircraft, ensuring that any required maintenance, inspections, or modifications are carried out within specified timeframes. Furthermore, CASA is responsible for monitoring compliance with ADs and can take enforcement actions against non-compliant aircraft or operators. Failure to comply with airworthiness directives can result in significant legal consequences. Under the Civil Aviation Act 1988, any person who contravenes an AD can be subject to enforcement actions by CASA. For individuals, contraventions may result in fines, with the maximum penalty varying based on the severity of the offence. For corporations, the penalties can be more substantial, potentially reaching thousands of dollars per contravention. Additionally, CASA can take measures such as grounding non-compliant aircraft, issuing prohibition notices, or pursuing legal action through the courts. These enforcement actions are intended to ensure that all aircraft meet the necessary safety standards and that any identified safety issues are promptly addressed. In severe cases, continued non-compliance can lead to criminal charges, with potential imprisonment for individuals found guilty of serious violations.

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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.