AD/TPE 331/10 - High Speed Pinion Bearing Assembly - Replacement - CANCELLED

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Legislation au F2009L03425 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, the Civil Aviation Safety Authority (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.

CASA or its predecessors issued AD/TPE 331/10 affecting Honeywell TPE 331 engines.  CASA has reviewed this AD and as a result has cancelled it.  The cancellation will become effective on 24 September 2009.  No replacement AD is required.

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, Future Technology and Regulatory Trends, in the Standards Development and Future Technology Division, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988 was enacted to establish a legislative framework ensuring the safety and efficiency of civil aviation in Australia. The Act provides the authority for the Civil Aviation Safety Authority (CASA) to issue regulations and directives aimed at maintaining the safety of air navigation. One such regulation is the Civil Aviation Safety Regulations 1998, which under regulation 39.001 allows CASA to issue airworthiness directives (ADs) for various types of aircraft or aeronautical products. These ADs are designed to ensure the continuing airworthiness of aircraft and are aligned with international standards set by the Convention on International Civil Aviation, specifically Annex 8. The 1988 Act enables CASA to issue and subsequently cancel ADs as necessary, reflecting Australia's commitment to international aviation safety standards and obligations under the Convention on International Civil Aviation. The cancellation of AD/TPE 331/10, for instance, demonstrates CASA's adherence to these international obligations, thereby maintaining the integrity and safety of Australia's civil aviation system.

Scope and Application

The Civil Aviation Act 1988 applies to all aspects of civil aviation in Australia, including the issuance of airworthiness directives (ADs) as a means of ensuring the safety of air navigation. Under regulation 39.001 of the Civil Aviation Safety Regulations 1998, the Civil Aviation Safety Authority (CASA) has the authority to issue ADs for specified kinds of aircraft or aeronautical products. These ADs are legislative instruments that are subject to disallowance under section 46A of the Acts Interpretation Act 1901 and are created in accordance with the Legislative Instruments Act 2003. The ADs are also governed by Annex 8 of the Convention on International Civil Aviation, which assigns the State of Design with the responsibility for the continuing airworthiness of an aircraft type, while the State of Registry must ensure the continuing airworthiness of individual aircraft. CASA has the authority to issue, review, and cancel ADs, as demonstrated by the recent cancellation of AD/TPE 331/10 concerning Honeywell TPE 331 engines, which will become effective on 24 September 2009. The cancellation of this AD was due to Australia's obligations under the Convention on International Civil Aviation, and no public consultation or Regulatory Impact Statement was required for this action. The AD was made by the Manager, Future Technology and Regulatory Trends, on behalf of CASA, in accordance with subsection 84A(2) of the Act.

Key Provisions

The Civil Aviation Act 1988 (section 98) empowers the Governor-General to enact regulations aimed at ensuring the safety of air navigation, which includes the issuance of airworthiness directives (ADs) through the Civil Aviation Safety Regulations 1998 (regulation 39.001). The ADs, which are considered legislative instruments under the Legislative Instruments Act 2003 (section 6), are a critical mechanism for maintaining the continuing airworthiness of aircraft and aeronautical products. This process ensures that the safety standards are upheld in accordance with international obligations, such as those outlined in Annex 8 of the Convention on International Civil Aviation. Under these provisions, the Civil Aviation Safety Authority (CASA) has the authority to issue ADs, which serve as the primary means of continuing airworthiness information for aircraft types. The State of Design, as defined by Annex 8, retains overall responsibility for the airworthiness of an aircraft type and must provide necessary information to the State of Registry, which in turn must implement measures to ensure the ongoing airworthiness of the aircraft. The AD/TPE 331/10, which concerned the Honeywell TPE 331 engines, was issued by CASA or its predecessors but has now been cancelled, effective from 24 September 2009, as a result of Australia's obligations under the Convention on International Civil Aviation. This cancellation does not require a replacement AD, and no consultation with the public or a Regulatory Impact Statement was deemed necessary by the Office of Best Practice Regulation. The obligations imposed on parties and entities governed by these regulations include adhering to the ADs issued by CASA. This means that aircraft operators, maintenance providers, and other relevant stakeholders must comply with the requirements set forth in the ADs to ensure that the aircraft remain airworthy. CASA, as the regulatory body, has the responsibility to issue and monitor compliance with these directives. The State of Registry, typically the country where the aircraft is registered, must implement and enforce the necessary measures to maintain the airworthiness of the aircraft as dictated by the ADs. Failure to comply with ADs can result in significant consequences. The Act and the Regulations outline various civil and criminal penalties for non-compliance. While specific penalties are not detailed in the provided text, under general aviation law, breaches can lead to fines, suspension or revocation of aircraft certificates, and in severe cases, criminal charges. The exact penalties can vary based on the nature and severity of the breach, but the overarching aim is to enforce strict adherence to safety standards to protect public safety and the integrity of the aviation system.

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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.