AD/CESSNA 185/4 - Tail Wheel Assembly - CANCELLED

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Legislation au F2008L01808 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/CESSNA 185/4 affecting Cessna 185 aircraft.  CASA has reviewed this AD and as a result has cancelled it.  The cancellation will become effective on 3 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, Systems and New Technologies in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

 

Overview

The Civil Aviation Act 1988, enacted by the Parliament of Australia, serves to regulate civil aviation in Australia with an emphasis on safety and efficiency. In line with this, the Civil Aviation Safety Regulations 1998 were established to provide detailed rules and procedures to ensure the safety of air navigation, including the issuance of airworthiness directives (ADs). ADs are legislative instruments issued by the Civil Aviation Safety Authority (CASA) to address specific safety concerns with particular types of aircraft or aeronautical products. The ADs are crucial for maintaining the continuing airworthiness of aircraft as required under international conventions such as Annex 8 to the Convention on International Civil Aviation. In response to Australia’s international obligations, CASA issued AD/CESSNA 185/4 for Cessna 185 aircraft, which has now been cancelled effective 3 July 2008. This cancellation aligns with Australia’s duty to the Convention on International Civil Aviation and did not require public consultation or a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation. The AD was cancelled by the Manager, Systems and New Technologies in the Airworthiness Engineering Branch on behalf of CASA, in accordance with the Civil Aviation Act 1988.

Scope and Application

The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 establish the framework for airworthiness directives (ADs) in Australia, ensuring the continuing safety of aircraft and aeronautical products registered in the country. Under the Act, the Governor-General has the authority to make regulations in the interest of air navigation safety, while regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. These directives are considered legislative instruments under the Legislative Instruments Act 2003, and they serve as a mechanism to maintain the airworthiness of aircraft in line with the standards set by the State of Design and in accordance with international obligations under the Convention on International Civil Aviation. The ADs are issued to ensure that aircraft maintain the necessary safety standards, and CASA, as Australia’s national airworthiness authority, must assess and, if necessary, issue Australian ADs to enforce these standards. The AD/CESSNA 185/4, which affected Cessna 185 aircraft, has been cancelled by CASA due to Australia's international obligations, and this cancellation became effective on 3 July 2008, without the need for public consultation or a Regulatory Impact Statement.

Key Provisions

The Civil Aviation Act 1988, as amended by the Civil Aviation Safety Regulations 1998, provides a framework for ensuring the safety of air navigation in Australia. Section 98 of the Act allows the Governor-General to make regulations, while regulation 39.001 specifically empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for various types of aircraft or aeronautical products. These ADs, as outlined in subregulation 39.001(5), are legislative instruments under section 46A of the Acts Interpretation Act 1901 and section 6 of the Legislative Instruments Act 2003. The obligations imposed by these regulations are multifaceted. The State of Design, typically the country where the aircraft type is designed, holds primary responsibility for the continuing airworthiness of that aircraft type. This includes providing necessary information to ensure the aircraft's continued safety, as stipulated in Annex 8 to the Convention on International Civil Aviation. In contrast, the State of Registry, which in Australia is CASA, must develop or adopt requirements to ensure the continuing airworthiness of individual aircraft registered within its jurisdiction. When a State of Design issues an AD, CASA must evaluate this information and, if deemed necessary, issue a corresponding Australian AD to enforce the requirements of the State of Design. Failure to comply with these regulations can lead to significant consequences. While the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 do not explicitly outline penalties for non-compliance with ADs, non-compliance with airworthiness directives can result in severe safety risks, including potential grounding of the aircraft, fines, or other regulatory actions by CASA. Such non-compliance may also lead to civil or criminal liability under other relevant aviation laws. The severity of penalties may vary based on the nature and extent of the non-compliance and could potentially include significant financial penalties or imprisonment. In summary, the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 establish a comprehensive system for maintaining airworthiness standards in Australia. They mandate clear responsibilities on both the State of Design and the State of Registry to ensure that aircraft remain safe for operation. CASA's role in issuing and enforcing ADs is critical to upholding these standards, and non-compliance with these directives can have serious legal and safety 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.