AD/GBK 117/18 Amdt 1 - Tail Rotor System - Control Lever - Inspection/Replacement

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Legislation au F2007L03588 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 EASA issued AD 2007-0237, affecting Eurocopter BK 117 helicopters.  EASA is the State of Design for these helicopters.  CASA has amended the equivalent Australian AD to AD/GBK 117/18 Amendment 1 which will become effective on 11 September 2007.  This AD cancels and replaces the previous issue.

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, Systems 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, governs the regulation of civil aviation in Australia. It was introduced to address the need for a comprehensive legal framework to ensure the safety and efficiency of civil aviation. The Act empowers the Governor-General to make regulations necessary for the safety of air navigation, with the Civil Aviation Safety Regulations 1998 being a critical component. One such regulation, 39.001, allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for types of aircraft or aeronautical products. These ADs are legislative instruments subject to disallowance and review, reflecting the importance of maintaining high safety standards. The authority to issue ADs stems from Australia’s obligations under the Convention on International Civil Aviation, particularly Annex 8, which assigns responsibility for the continuing airworthiness of aircraft to the State of Design and the State of Registry. CASA, as the national airworthiness authority, must ensure that Australian aircraft comply with international standards by issuing corresponding ADs when necessary.

Scope and Application

The Civil Aviation Safety Regulations 1998, under section 98 of the Civil Aviation Act 1988, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products, serving to ensure the continuing airworthiness of aircraft registered in Australia. These ADs are legislative instruments, subject to disallowance and review under the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. The State of Design, such as the European Aviation Safety Agency (EASA) for Eurocopter BK 117 helicopters, has the primary responsibility for issuing ADs to maintain the airworthiness of aircraft types, while the State of Registry, in this case CASA, is tasked with ensuring the ongoing airworthiness of individual aircraft registered within its jurisdiction. The issuance of ADs is in compliance with Annex 8 of the Convention on International Civil Aviation, which mandates the coordination between States of Design and Registry to uphold international safety standards. Given the international nature of these directives and the urgent need to respond to safety concerns, the process does not involve public consultation or require a Regulatory Impact Statement. Instead, CASA issues ADs promptly to address any safety issues identified by the State of Design.

Key Provisions

The Civil Aviation Safety Regulations 1998, under section 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. These ADs, as detailed in subregulation 39.001(5), are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901, and thus are legislative instruments under section 6 of the Legislative Instruments Act 2003. ADs serve as a primary means of ensuring the continuing airworthiness of aircraft types, as stipulated by Annex 8 to the Convention on International Civil Aviation. In line with this international framework, the State of Design, such as the European Aviation Safety Agency (EASA) for Eurocopter BK 117 helicopters, holds the primary responsibility for the continuing airworthiness of aircraft types and must provide necessary information to States of Registry. Conversely, the State of Registry, which in Australia is CASA, must ensure the continuing airworthiness of individual aircraft by implementing or adopting relevant requirements, including those mandated by ADs from the State of Design. Entities governed by the Civil Aviation Safety Regulations 1998, particularly CASA, have several obligations when it comes to airworthiness directives. CASA must rigorously assess any ADs issued by the State of Design, such as EASA, to determine their applicability and necessity for aircraft registered in Australia. Upon such assessment, CASA may issue corresponding Australian ADs to enforce the State of Design's requirements on Australian-registered aircraft. This involves a thorough evaluation process to ensure that the mandated measures are both appropriate and necessary for maintaining the safety standards of Australian air navigation. Furthermore, CASA must ensure that these ADs are communicated effectively to all relevant stakeholders, including aircraft operators and maintenance personnel, to facilitate compliance. Failure to comply with an airworthiness directive can lead to severe consequences under the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998. Operating an aircraft that does not comply with an AD can result in significant penalties, both civil and criminal. Civil penalties may include fines and other monetary sanctions, while criminal penalties could involve imprisonment, reflecting the seriousness with which non-compliance is treated. The specific penalties are detailed in the Civil Aviation Regulations 1988 and can vary depending on the nature and severity of the violation. For instance, operating a non-compliant aircraft might incur substantial fines and potential imprisonment for the responsible individuals or entities, underscoring the critical importance of adhering to ADs to ensure the safety and integrity of air navigation.

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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.