AD/BO 105/21 - Tension-Torsion Strap - 2

Overview

The Civil Aviation Act 1988 was enacted to regulate civil aviation in Australia and to ensure the safety and efficiency of air navigation. The Act empowers the Governor-General to make regulations necessary for the safety of air navigation. The Civil Aviation Safety Regulations 1998, made under the authority of the Act, include provisions for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). These ADs are legislative instruments that mandate safety requirements for aircraft and aeronautical products, and they reflect Australia's commitment to international standards under the Convention on International Civil Aviation. The recent issuance of Australian AD/BO 105/21 in response to German AD 1999-290/3 for Messerschmitt-Bolkow Blohm BO 105 model helicopters exemplifies CASA's role in ensuring compliance with international airworthiness standards. The process does not require public consultation or a Regulatory Impact Statement, as it is driven by international obligations and the assessed necessity to maintain aircraft safety.

Scope and Application

The Civil Aviation Act 1988, through the Civil Aviation Safety Regulations 1998, provides the framework for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). This legislative instrument applies to all persons and entities involved in the operation, maintenance, and manufacture of aircraft within Australia, as well as any aeronautical products used within Australian airspace. ADs are mandated to ensure the continuing airworthiness of aircraft types, aligning with the requirements set out in Annex 8 to the Convention on International Civil Aviation. CASA, as Australia's national airworthiness authority, has the responsibility to assess and issue these directives in response to actions taken by the State of Design or as required by international obligations. The issuance of ADs is a legislative process that does not require public consultation or a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation. This legislative action is executed by authorised personnel within CASA, ensuring compliance with both national and international aviation safety standards.

Key Provisions

The Civil Aviation Act 1988, specifically under section 98, allows the Governor-General to enact regulations that are in the interests of air navigation safety. This authority is exercised through the Civil Aviation Safety Regulations 1998, where regulation 39.001 empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. Subregulation 39.001(5) further clarifies that an AD is a disallowable instrument, thereby classifying it as a legislative instrument according to section 6 of the Legislative Instruments Act 2003. The obligations imposed by this Act on CASA and other entities primarily revolve around ensuring the continuing airworthiness of aircraft. The State of Design, which is the country where the aircraft type is designed, holds the primary responsibility for maintaining airworthiness, as stipulated in Annex 8 to the Convention on International Civil Aviation. This includes providing necessary information to ensure the airworthiness of the aircraft type to the States of Registry. The State of Registry, which is the country where the individual aircraft is registered, must develop or adopt requirements to ensure the continuing airworthiness of aircraft within its jurisdiction. CASA, acting as Australia's national airworthiness authority, is required to assess any ADs issued by the State of Design and, if deemed appropriate, issue corresponding Australian ADs to enforce the necessary requirements. The Civil Aviation Safety Regulations 1998 establish that any breach of an airworthiness directive can result in significant legal consequences. While the specific penalties are not detailed within the text, it is generally understood that non-compliance with ADs can lead to serious civil or criminal penalties. These may include fines, imprisonment, or both, depending on the severity of the breach and the specific provisions of the AD in question. The authority to enforce these penalties typically rests with CASA, which can take action against operators or individuals who fail to comply with the mandates set forth in the ADs. The process by which ADs are issued is governed by the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998, ensuring that all directives are in line with international standards and obligations under the Convention on International Civil Aviation. The German LBA’s issuance of AD 1999-290/3, affecting Messerschmitt-Bolkow Blohm BO 105 model helicopters, illustrates this process. Germany, as the State of Design, issued the directive, which CASA subsequently assessed and issued as Australian AD/BO 105/21. This AD was issued without public consultation due to its basis in international obligations, and it was determined by the Office of Best Practice Regulation that it does not require a Regulatory Impact Statement. The AD was made by the Manager, Airframes in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A(2) of the Act.