AD/ENST 28/8 - Fuselage Structure - Inspection - CANCELLED

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au F2009L03043 Not 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 Civil Aviation Safety Authority or its predecessors issued AD/ENST 28/8 affecting Enstrom F-28 series helicopters.  CASA has assessed this AD and as a result has cancelled Australian AD/ENST 28/8.  The cancellation will become effective on 27 August 2009.  No replacement AD is required, as the unsafe condition no longer exists.

As this AD has been cancelled because of Australia’s obligations under the Convention on International Civil Aviation, no consultation with the Australian public has taken place on this AD cancellation.  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 Initial Airworthiness in the Airworthiness and Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988 was enacted to provide for the regulation of civil aviation in Australia, with a particular focus on ensuring the safety of air navigation. This legislation empowers the Governor-General to make regulations that serve the interests of air navigation safety, thereby delegating authority to the Civil Aviation Safety Authority (CASA) under regulation 39.001 of the Civil Aviation Safety Regulations 1998 to issue airworthiness directives (ADs). These directives, which are legislative instruments, play a crucial role in maintaining the continuing airworthiness of aircraft types. In alignment with the Convention on International Civil Aviation, the State of Design has a responsibility to ensure the continuing airworthiness of aircraft types, and CASA, as Australia’s national airworthiness authority, is tasked with assessing this information and issuing Australian ADs as necessary. This legislative framework ensures that the safety standards for aviation are upheld, reflecting Australia's commitment to international civil aviation agreements.

Scope and Application

The Civil Aviation Act 1988, as amended, provides the legislative framework for civil aviation safety in Australia, delegating authority to the Civil Aviation Safety Authority (CASA) to issue regulations and directives that ensure the safety of air navigation. Specifically, regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers CASA to issue airworthiness directives (ADs) for particular kinds of aircraft or aeronautical products. These ADs are legislative instruments, disallowable under section 46A of the Acts Interpretation Act 1901 and regulated by the Legislative Instruments Act 2003. ADs are integral to the continuing airworthiness of aircraft, mandated by Annex 8 to the Convention on International Civil Aviation, which assigns responsibility for such directives to the State of Design and the State of Registry. CASA, as Australia's national airworthiness authority, must evaluate and, if necessary, issue Australian ADs to enforce the requirements set by the State of Design. This process ensures that all aircraft registered in Australia meet safety standards as per international conventions.

Key Provisions

The primary sections of the Civil Aviation Act 1988 and Civil Aviation Safety Regulations 1998 pertinent to the issuance of airworthiness directives (ADs) are section 98 of the Act and regulation 39.001 of the Regulations (39.001). These provisions empower the Governor-General to enact regulations for air navigation safety and the Civil Aviation Safety Authority (CASA) to issue ADs for specific aircraft types or aeronautical products. Subregulation 39.001(5) further clarifies that an AD is a disallowable instrument under the Acts Interpretation Act 1901 and a legislative instrument as per the Legislative Instruments Act 2003 (6). The State of Design holds responsibility for an aircraft type's continuing airworthiness under Annex 8 to the Convention on International Civil Aviation, while the State of Registry is tasked with ensuring the airworthiness of individual aircraft (Annex 8). Entities governed by these regulations, including CASA and the State of Registry, must adhere to several obligations. CASA is required to evaluate information from State of Design ADs, and if appropriate, issue corresponding Australian ADs to enforce the requirements set by the State of Design (Annex 8). The State of Registry must develop or adopt requisite measures to ensure the continuing airworthiness of aircraft registered within its jurisdiction (Annex 8). These obligations ensure compliance with international standards and maintain the safety and airworthiness of aircraft. Failure to comply with the provisions and obligations outlined in the Act and Regulations may result in various legal consequences. While specific offences and penalties are not detailed in the provided text, regulatory breaches can potentially lead to civil or criminal sanctions. The severity of penalties would depend on the nature and extent of the non-compliance, and could include fines or imprisonment as stipulated by other applicable laws. It is important for all entities involved to meticulously adhere to the stipulated requirements to avoid such repercussions.

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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.