AD/PHZL/68 Amdt 4 - Turbine Engine; Steel Hub Propellers

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Legislation au F2006L01312 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 issued 96-18-14, affecting Hartzell propellers.  The United States is the State of Design for these propellers.  As a result of a request from industry, CASA has amended the equivalent Australian AD to AD/PHZL/68 Amendment 4 which will become effective on 3 May 2006.  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, 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 establish a comprehensive legal framework for civil aviation in Australia, aiming to ensure the safety, efficiency, and orderly growth of civil aviation within the country. This Act was introduced to address the need for a cohesive and robust regulatory system that could manage the complexities of air travel and aircraft operations, thereby safeguarding public safety and national interests. The Australian Parliament enacted this legislation to provide the necessary authority to regulate various aspects of civil aviation, including aircraft operations, airworthiness, and the qualifications of aviation personnel. The overarching policy objective of the Act is to maintain high standards of safety and efficiency in civil aviation, aligning with international conventions and obligations. Under this Act, the Civil Aviation Safety Regulations 1998 were subsequently developed to provide detailed rules and standards necessary for the implementation of the Act's provisions. These regulations empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) to ensure the continuing airworthiness of aircraft. An AD is a legislative instrument issued by CASA in response to international airworthiness directives from the State of Design, which is responsible for the aircraft type. The ADs are critical for maintaining safety standards and ensuring that aircraft on the Australian Register meet the necessary safety requirements as mandated by international aviation conventions. The process of issuing these directives is governed by the Legislative Instruments Act 2003, which outlines the framework for the creation and implementation of such legislative instruments.

Scope and Application

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) to ensure the safety of air navigation. These regulations apply to all aircraft registered in Australia, imposing mandatory requirements on the aircraft's continuing airworthiness. The issuance of ADs is grounded in the Convention on International Civil Aviation, which assigns the State of Design the responsibility for the continuing airworthiness of aircraft types, with the State of Registry ensuring compliance. CASA, as Australia's national airworthiness authority, must assess and, if necessary, issue Australian ADs in response to those from the State of Design, such as the United States Federal Aviation Administration (FAA). This legislative framework allows CASA to address safety concerns by mandating specific actions or modifications to aircraft and aeronautical products, as exemplified by AD/PHZL/68 Amendment 4, which replaces earlier directives related to Hartzell propellers. This AD was issued without public consultation and does not require a Regulatory Impact Statement, reflecting its urgent safety-focused nature.

Key Provisions

The key provisions of the Civil Aviation Safety Regulations 1998, as they relate to airworthiness directives (ADs), are found in regulation 39.001 (paragraphs 5 and 6) which empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. Regulation 39.001(5) clarifies that an AD is a disallowable instrument under the Acts Interpretation Act 1901, and consequently, an AD is considered a legislative instrument as per section 6 of the Legislative Instruments Act 2003. This regulatory framework is designed to ensure the continuing airworthiness of aircraft and aeronautical products, in line with international standards set forth in Annex 8 to the Convention on International Civil Aviation. The obligations imposed by the Civil Aviation Safety Regulations 1998 on the parties involved are significant. The State of Design has the primary responsibility for the continuing airworthiness of an aircraft type and must provide necessary information to appropriate States of Registry. In response, the State of Registry, which in Australia is CASA, must assess this information and issue appropriate ADs if necessary. This ensures that the Australian aviation industry adheres to the same safety standards as other ICAO Contracting States. For instance, when the United States Federal Aviation Administration issued AD 96-18-14 concerning Hartzell propellers, CASA issued an equivalent Australian AD (AD/PHZL/68 Amendment 4) to maintain airworthiness standards. There are no specified offences, penalties, or civil/criminal consequences for breaching an AD under the Civil Aviation Safety Regulations 1998. However, failure to comply with an AD can lead to severe consequences, including the grounding of aircraft, which can result in significant operational disruptions and financial losses for operators. Although the regulations do not explicitly state penalties, non-compliance can result in enforcement actions by CASA, which may include fines, suspension of certificates, or other regulatory measures to ensure compliance with safety standards. In summary, the Civil Aviation Safety Regulations 1998 establish a robust framework for issuing ADs to ensure the continuing airworthiness of aircraft and aeronautical products. CASA's role as the national airworthiness authority involves assessing information from the State of Design and issuing corresponding ADs. While the regulations do not detail specific penalties for non-compliance, the consequences of failing to adhere to ADs can be severe, including potential grounding of aircraft and significant operational 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.