AD/G1159/35 Amdt 1 - Takeoff Warning System

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Legislation au F2009L04657 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.

CASA issued AD/G1159/35 affecting Gulfstream aircraft, in 1990.  As a result of a request from industry, CASA has amended this AD to extend the applicability of the Directive to include G-III aeroplanes and certain G-IV aeroplanes.  The amended AD, AD/G1159/35 Amendment 1, will become effective on 22 December 2009.  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 Regulatory Review has determined that ADs do not require a Regulatory Impact Statement.

The AD has been made by the Manager, Continuing Airworthiness, in the Airworthiness and Engineering Branch, on behalf of CASA, in accordance with subsection 94 (1) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, governs civil aviation matters in Australia and seeks to ensure the safety and efficiency of civil aviation within the country. The Act empowers the Governor-General to make regulations to uphold the safety of air navigation. One such regulation is detailed in the Civil Aviation Safety Regulations 1998, where the Civil Aviation Safety Authority (CASA) is authorised to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. These directives are legislative instruments, designed to ensure the continuing airworthiness of aircraft in accordance with international standards, particularly under Annex 8 to the Convention on International Civil Aviation. This legislation addresses the need for a standardised approach to maintaining the safety and airworthiness of aircraft operating within Australia, reflecting the nation’s commitment to international civil aviation agreements.

Scope and Application

The Civil Aviation Safety Regulations 1998, under the authority of the Civil Aviation Act 1988, allow the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products to ensure the safety of air navigation. These ADs are legislative instruments and are subject to disallowance and review processes as stipulated in the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. They serve as crucial tools for maintaining the continuing airworthiness of aircraft, aligning with the responsibilities outlined in Annex 8 to the Convention on International Civil Aviation. The State of Design holds primary responsibility for an aircraft type's airworthiness, while the State of Registry, in this case CASA for Australia, ensures compliance with the continuing airworthiness requirements. The AD/G1159/35 Amendment 1, effective from 22 December 2009, extends the applicability to additional Gulfstream aircraft models, reflecting CASA's duty to adopt and mandate the requirements set by the relevant State of Design. Given the international nature and specific technical requirements of these directives, they do not undergo public consultation or require a Regulatory Impact Statement.

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 noted in subregulation 39.001(5), are considered disallowable instruments under section 46A of the Acts Interpretation Act 1901, and thus constitute legislative instruments under section 6 of the Legislative Instruments Act 2003. This provision ensures that ADs are formally recognised and their issuance is aligned with statutory authority. Under the continuing airworthiness framework set out in Annex 8 to the Convention on International Civil Aviation, the State of Design holds primary responsibility for the airworthiness of an aircraft type and must provide necessary information to the States of Registry to maintain airworthiness. Correspondingly, States of Registry, including Australia via CASA, are tasked with ensuring the ongoing airworthiness of individual aircraft and must develop or adopt appropriate requirements to meet this obligation. This regulatory interplay ensures that ADs, which are common forms of continuing airworthiness information, are issued by ICAO Contracting States in accordance with international standards. The obligations imposed by these regulations on parties, particularly CASA, include the assessment and issuance of Australian ADs when the State of Design issues a corresponding directive. CASA, as Australia’s national airworthiness authority, must rigorously evaluate the information provided by the State of Design and, where necessary, issue an AD that mandates the specified requirements. This ensures that Australian-registered aircraft meet international airworthiness standards and aligns with Australia’s obligations under the Convention on International Civil Aviation. Given the international nature of aviation safety and the need for uniformity, CASA’s actions are not subject to public consultation under these circumstances, as confirmed by the Office of Regulatory Review, which determined that ADs do not require a Regulatory Impact Statement. The issuance of ADs, therefore, is a formal process overseen by CASA, ensuring that all regulatory actions are compliant with the legislative framework and international obligations. In terms of legal consequences, any failure to comply with the requirements set forth in an AD can lead to significant civil or criminal penalties. Under the Civil Aviation Act 1988, non-compliance with ADs can result in substantial fines and, in severe cases, criminal charges against individuals or corporations. The exact penalties depend on the severity and intent behind the non-compliance but can include financial penalties up to substantial amounts as stipulated in the Act. Additionally, operational consequences may include the grounding of aircraft, which can have severe implications for air safety and the operations of the airline involved. Ensuring strict adherence to ADs is, therefore, critical for maintaining the safety standards required by both national and international aviation regulations.

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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.