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/DHC-6/11 affecting De Havilland DHC-6 (Twin Otter) model aeroplanes with serial numbers 1 to 95. CASA has assessed this AD and as a result has cancelled Australian
AD/DHC-6/11. The cancellation will become effective on 20 November 2008. 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 was enacted to provide for the regulation of civil aviation in Australia and to ensure the safety and efficiency of air navigation within the country. One of its key provisions allows the Governor-General to make regulations for the purposes of the Act, including those related to airworthiness directives, which are integral to maintaining the safety of aircraft. The Civil Aviation Safety Regulations 1998 further empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives for certain types of aircraft and aeronautical products. The authority to issue such directives stems from the overarching goal of ensuring the safety of air navigation, aligning with Australia's international obligations under the Convention on International Civil Aviation. The process of issuing and cancelling airworthiness directives is overseen by CASA, which acts as the national airworthiness authority, ensuring compliance with both national and international standards for aircraft safety.
Scope and Application
The Civil Aviation Act 1988 and its associated Civil Aviation Safety Regulations 1998 empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) aimed at ensuring the safety of air navigation in Australia. These ADs apply to specific kinds of aircraft or aeronautical products, and they are mandated under regulation 39.001 of the Civil Aviation Safety Regulations 1998. Each AD is considered a legislative instrument as per the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. The geographic reach of these ADs is inherently national, as CASA acts as Australia's national airworthiness authority. However, the ADs are also influenced by international obligations under the Convention on International Civil Aviation, particularly through Annex 8, which places the responsibility for continuing airworthiness of an aircraft type on the State of Design and requires States of Registry to ensure the airworthiness of individual aircraft. As such, when the State of Design issues an AD, CASA must assess it and, if necessary, issue an Australian AD. For instance, CASA issued and subsequently cancelled AD/DHC-6/11 affecting certain De Havilland DHC-6 (Twin Otter) model aeroplanes, reflecting the dynamic nature of airworthiness mandates and their alignment with international safety standards.
Key Provisions
The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 outline the framework for issuing airworthiness directives (ADs). Section 98 of the Civil Aviation Act 1988 allows the Governor-General to make regulations in the interests of air navigation safety. Under regulation 39.001 of the Civil Aviation Safety Regulations 1998, the Civil Aviation Safety Authority (CASA) is empowered to issue ADs for types of aircraft or aeronautical products. Furthermore, subregulation 39.001(5) specifies that ADs are disallowable instruments, making them legislative instruments under the Acts Interpretation Act 1901 and the Legislative Instruments Act 2003. These directives are essential for ensuring the continuing airworthiness of aircraft, aligning with international standards set by Annex 8 to the Convention on International Civil Aviation.
The obligations placed on parties under this Act include ensuring compliance with ADs issued by CASA. The State of Design, which is responsible for the initial airworthiness of a type of aircraft, must provide necessary information to ensure the continuing airworthiness of that type. The State of Registry, where an aircraft is registered, must develop or adopt requirements to ensure the continuing airworthiness of aircraft within its jurisdiction. For example, if a State of Design issues an AD against a type of aircraft on the Australian Register, CASA must assess this information and, if necessary, issue an Australian AD to enforce the requirements of the State of Design.
Failure to comply with ADs can lead to serious consequences. The Act does not specify particular offences or penalties for non-compliance with ADs, but non-compliance could result in the aircraft being deemed unairworthy, leading to potential grounding or refusal of airworthiness certification. Such outcomes can have severe civil and criminal implications, including potential fines and imprisonment for individuals or entities that fail to adhere to the mandated safety requirements. The gravity of these consequences underscores the importance of strict compliance with ADs to maintain the safety standards of air navigation.
In summary, the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 provide a robust framework for the issuance and enforcement of ADs to ensure the continuing airworthiness of aircraft. CASA's role in issuing and assessing ADs, along with the responsibilities of States of Design and Registry, is critical in maintaining the safety and integrity of air navigation. Non-compliance with ADs can lead to serious civil and criminal repercussions, highlighting the necessity for strict adherence to these legislative provisions.