AD/LA-4/7 - Hull Frame Station 97 - Inspection and Modification - CANCELLED

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Legislation au F2009L02213 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/LA-4/7 affecting Consolidated Aeronautics, Colonial LA-4 series aeroplanes.  CASA has assessed this AD and as a result has cancelled Australian AD/LA-4/7.  The cancellation will become effective on 2 July 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, Airframe and Structures, in the Airworthiness Engineering Group, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

Overview

The Civil Aviation Act 1988, enacted by the Australian Parliament, addresses the regulation of civil aviation and the promotion of safety within the sector. The Act provides the legal framework for the Civil Aviation Safety Regulations 1998, which in turn allow the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for types of aircraft and aeronautical products. The ADs are legislative instruments that ensure the continuing airworthiness of aircraft in accordance with international standards, particularly under Annex 8 of the Convention on International Civil Aviation. The ADs mandate requirements that must be met by the State of Registry of an individual aircraft to maintain its airworthiness. The Civil Aviation Act 1988 thus aims to safeguard the public by ensuring that aircraft and aeronautical products meet safety standards, both domestically and internationally.

Scope and Application

The Civil Aviation Act 1988, in conjunction with the Civil Aviation Safety Regulations 1998, empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) that apply to specific kinds of aircraft or aeronautical products in Australia. This regulatory framework ensures the continuing airworthiness of aircraft by mandating compliance with safety standards, thereby enhancing the safety of air navigation. ADs, as legislative instruments, are subject to disallowance under the Acts Interpretation Act 1901, and their issuance is aligned with Australia’s commitments under the Convention on International Civil Aviation. CASA, as Australia’s national airworthiness authority, is obligated to assess ADs issued by the State of Design and, if appropriate, issue corresponding Australian ADs to enforce these requirements. The scope of these regulations is comprehensive, applying to all aircraft registered in Australia, and mandates that the State of Registry, in this case CASA, ensures adherence to the continuing airworthiness requirements. Notably, the Civil Aviation Safety Regulations 1998 also include provisions for the cancellation of ADs when the associated safety issues no longer exist, as evidenced by the cancellation of AD/LA-4/7 for Consolidated Aeronautics, Colonial LA-4 series aeroplanes, effective from 2 July 2009.

Key Provisions

The Civil Aviation Act 1988 (section 98) grants the Governor-General the authority to create regulations for air safety, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. An AD is considered a disallowable instrument under section 46A of the Acts Interpretation Act 1901 and a legislative instrument under the Legislative Instruments Act 2003 (section 6). These directives are essential for ensuring the continuing airworthiness of aircraft and are issued by the State of Design, which is responsible for the overall airworthiness of an aircraft type. Under the Civil Aviation Safety Regulations 1998 (subregulation 39.001(5)), and in line with Annex 8 to the Convention on International Civil Aviation, the State of Registry, which in the case of Australia is CASA, must develop or adopt requirements to ensure the continuing airworthiness of aircraft registered in its territory. When a State of Design issues an AD, CASA must evaluate the information and, if necessary, issue an Australian AD to enforce the State of Design's requirements. The State of Design has the overall responsibility for providing any information needed to maintain the continuing airworthiness of a type of aircraft, and this is communicated through ADs or their equivalents, which are commonly used by ICAO Contracting States. The obligations imposed by the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 include the requirement for CASA to assess ADs issued by the State of Design and, if necessary, issue Australian ADs to ensure the continuing airworthiness of aircraft on the Australian Register. The AD/LA-4/7 affecting Consolidated Aeronautics, Colonial LA-4 series aeroplanes, issued by CASA, was cancelled due to the resolution of the unsafe condition, effective from 2 July 2009. The cancellation was made in accordance with subsection 84A(2) of the Civil Aviation Act 1988, and no public consultation or Regulatory Impact Statement was required as per the obligations under the Convention on International Civil Aviation and the Office of Best Practice Regulation's determination. Under the Civil Aviation Act 1988, breaches of ADs can result in serious consequences. The maximum penalties for non-compliance with ADs can include substantial fines and, in some cases, imprisonment. The severity of the penalty depends on the nature of the breach, the extent of the non-compliance, and the potential risk to safety posed by the violation. It is crucial for aircraft operators and owners to adhere to ADs to maintain the airworthiness of their aircraft and avoid the legal and safety ramifications of non-compliance.

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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.