AD/PA-31/90 - Rudder Trim Mechanism - CANCELLED

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Legislation au F2008L02468 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/PA-31/90 affecting Piper PA-31T and PA-31T1 aircraft.  CASA has reviewed this AD and as a result has cancelled it.  The cancellation will become effective on 31 July 2008.  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, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

 

Overview

The Civil Aviation Act 1988 was enacted to ensure the safety and efficiency of civil aviation in Australia. The Act provides the legislative framework for regulating civil aviation and allows the Governor-General to make regulations to promote safety in air navigation. One such regulation is the Civil Aviation Safety Regulations 1998, which empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for types of aircraft or aeronautical products. An AD is a legislative instrument, and the cancellation of an AD is subject to certain legislative processes. CASA has cancelled AD/PA-31/90 affecting Piper PA-31T and PA-31T1 aircraft, which will become effective on 31 July 2008. The cancellation of the AD is due to Australia’s obligations under the Convention on International Civil Aviation, and no consultation with the Australian public has taken place. The Office of Best Practice Regulation has determined that ADs do not require a Regulatory Impact Statement. The Civil Aviation Safety Regulations 1998, under the authority of the Civil Aviation Act 1988, empower CASA to issue ADs to ensure the continuing airworthiness of aircraft. The State of Design has overall responsibility for continuing airworthiness of an aircraft type, and the State of Registry is responsible for the continuing airworthiness of an individual aircraft. ADs are the most common form of continuing airworthiness information, and are issued by most ICAO Contracting States. CASA has cancelled AD/PA-31/90 affecting Piper PA-31T and PA-31T1 aircraft, and no replacement AD is required. The cancellation of the AD is due to Australia’s obligations under the Convention on International Civil Aviation, and no consultation with the Australian public has taken place. The AD has been made by the Manager, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A(2) of the Act.

Scope and Application

The Civil Aviation Safety Regulations 1998, under section 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) pertaining to specific types of aircraft or aeronautical products. These ADs are legislative instruments as per section 46A of the Acts Interpretation Act 1901 and section 6 of the Legislative Instruments Act 2003. The application of these ADs extends to ensuring the continuing airworthiness of aircraft types, as per the requirements outlined in Annex 8 of the Convention on International Civil Aviation. This involves the State of Design providing necessary information to the State of Registry, which is then responsible for implementing the ADs to maintain airworthiness standards. The geographic scope of this regulation is national, with CASA, acting on behalf of the Commonwealth, enforcing compliance across Australia. ADs are subject to disallowance, and their issuance, amendment, or cancellation must align with Australia's international obligations, particularly those outlined in the Convention on International Civil Aviation. In this instance, the AD/PA-31/90 concerning Piper PA-31T and PA-31T1 aircraft has been cancelled effective 31 July 2008, following a review by CASA, and no replacement AD is required.

Key Provisions

The Civil Aviation Act 1988, particularly under section 98, empowers the Governor-General to enact regulations for the safety of air navigation, including the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA) as detailed in regulation 39.001 of the Civil Aviation Safety Regulations 1998. An AD is a legislative instrument, which can be disallowed under section 46A of the Acts Interpretation Act 1901 and is subject to the Legislative Instruments Act 2003. This regulatory mechanism ensures that ADs, which are essential for maintaining the continuing airworthiness of aircraft, align with international standards as outlined in Annex 8 to the Convention on International Civil Aviation. The State of Design holds the primary responsibility for ensuring the continuing airworthiness of an aircraft type and must provide necessary information to the States of Registry, who in turn are tasked with developing or adopting requirements to ensure the ongoing airworthiness of individual aircraft. Under the Civil Aviation Safety Regulations 1998, CASA has the authority to issue ADs for specific types of aircraft or aeronautical products. These directives serve as a critical tool for maintaining safety standards and ensuring that aircraft remain airworthy throughout their operational life. An example of this regulatory process is the issuance and subsequent cancellation of AD/PA-31/90 affecting Piper PA-31T and PA-31T1 aircraft, which was reviewed and cancelled by CASA due to Australia’s obligations under the Convention on International Civil Aviation. This cancellation will take effect on 31 July 2008, and no replacement AD is deemed necessary. The cancellation process has been conducted without public consultation, as determined by the Office of Best Practice Regulation, which has concluded that ADs do not require a Regulatory Impact Statement. The obligations imposed by these regulations are multifaceted. CASA, as the regulatory body, must ensure that ADs are issued in accordance with both national and international standards. The State of Registry must develop or adopt requirements to ensure the continuing airworthiness of aircraft, while the State of Design must provide any necessary information to support this process. These obligations reflect a shared responsibility between states to maintain high safety standards in civil aviation. CASA’s role in issuing and cancelling ADs is critical in this context, as it ensures that aircraft meet the necessary safety requirements and that any deficiencies are promptly addressed. Breaches of the Civil Aviation Act 1988 and the associated regulations can result in significant civil and criminal consequences. While specific offences and penalties are not detailed in the provided text, it is known that non-compliance with ADs can lead to severe penalties, including fines and imprisonment, as these directives are integral to ensuring the safety of air navigation. The legal framework underscores the importance of adhering to ADs, as failure to do so can compromise the safety of aircraft and passengers, leading to potential legal repercussions for the entities involved.

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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.