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.
CASA issued AD/DH 84/4, affecting De Havilland DH 84 model aircraft in 2005. This AD was based on UK AD G-2005-0025. The UK, the State of Design for this type, has now cancelled their AD. As a result, CASA has cancelled AD/DH 84/4. The cancellation will become effective on 10 April 2008. No replacement AD is required, as the UK CAA has determined that normal maintenance practices will ensure airworthiness.
No consultation with the Australian public has taken place on this AD cancellation, because the cancellation results in a reduction of the regulatory burden. 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 provide a comprehensive legislative framework for the regulation of civil aviation in Australia, with a particular emphasis on ensuring the safety and efficiency of air navigation. The Act grants the Governor-General the authority to make regulations under section 98, which are integral to maintaining the safety standards required for air navigation. One such regulation is the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA) under regulation 39.001 of the Civil Aviation Safety Regulations 1998. This mechanism allows CASA to mandate specific actions to address safety issues related to aircraft or aeronautical products, in line with international standards set by the International Civil Aviation Organization (ICAO). The objective of these regulations is to ensure the continuing airworthiness of aircraft, thereby protecting public safety and promoting the efficient operation of the aviation industry. The enactment of this legislation by the Australian Parliament reflects a commitment to upholding high safety standards in civil aviation.
Scope and Application
The Civil Aviation Act 1988, through regulation 39.001 of the Civil Aviation Safety Regulations 1998, grants the Civil Aviation Safety Authority (CASA) the authority to issue airworthiness directives (ADs) for specific kinds of aircraft or aeronautical products. This legislative framework applies to entities such as aircraft manufacturers, operators, and maintenance providers who must adhere to the safety requirements stipulated in the ADs. These regulations have a national reach within Australia, ensuring that all aircraft registered within the country must comply with the continuing airworthiness mandates set forth by CASA. It is important to note that ADs are considered legislative instruments under the Legislative Instruments Act 2003, thereby requiring adherence to the statutory processes for their issuance and cancellation. The recent cancellation of AD/DH 84/4, which pertained to De Havilland DH 84 model aircraft, exemplifies the application of these regulations, where CASA assessed and followed the lead of the UK's decision to cancel their equivalent directive. This cancellation, effective from 10 April 2008, was made without public consultation as it was deemed to reduce regulatory burden, and no replacement AD was necessary as normal maintenance practices were deemed sufficient to ensure airworthiness.
Key Provisions
The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide the framework for the issuance of airworthiness directives (ADs). Under section 98 of the Civil Aviation Act 1988, the Governor-General is empowered to make regulations for the safety of air navigation, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 allows the Civil Aviation Safety Authority (CASA) to issue ADs for specific types of aircraft or aeronautical products. An AD is defined in subregulation 39.001(5) as a disallowable instrument under section 46A of the Acts Interpretation Act 1901, and thus qualifies as a legislative instrument under section 6 of the Legislative Instruments Act 2003. ADs are essential tools for ensuring the continuing airworthiness of aircraft, aligning with the responsibilities outlined in Annex 8 to the Convention on International Civil Aviation, where the State of Design must provide necessary information to ensure airworthiness and the State of Registry must implement appropriate requirements.
The obligations placed on CASA and other entities under these regulations include the assessment and potential issuance of ADs when necessary. When a State of Design issues an AD, CASA must review the information and, if necessary, issue an Australian AD to enforce the requirements for aircraft registered in Australia. This ensures that Australian aircraft meet the necessary safety standards. For example, CASA issued AD/DH 84/4 in 2005, which was based on a UK AD for De Havilland DH 84 model aircraft. Recently, CASA cancelled AD/DH 84/4 after the UK Civil Aviation Authority cancelled their equivalent AD, effective from 10 April 2008. This cancellation was made because the UK determined that normal maintenance practices would continue to ensure airworthiness.
The consequences for non-compliance with ADs can be significant. Failure to adhere to an AD can lead to serious safety issues, and CASA has the authority to take enforcement actions against non-compliant aircraft and operators. While no consultation with the Australian public was required for the cancellation of AD/DH 84/4 as it reduces regulatory burden, entities must still comply with the remaining ADs to maintain airworthiness. The cancellation process itself, managed by the Manager, Airframes in the Airworthiness Engineering Branch, adheres to the statutory requirements set out in subsection 84A(2) of the Act. The Office of Best Practice Regulation has also determined that ADs do not necessitate a Regulatory Impact Statement in this context.