CASA ADCX 009/10 - Revocation of Airworthiness Directives

Overview

The Civil Aviation Regulations 1988, enacted by the Australian Parliament, aim to ensure the safety of air navigation through comprehensive regulation of civil aviation. Under this Act, the Civil Aviation Safety Authority (CASA) can issue airworthiness directives (ADs) that mandate specific requirements for the continuing airworthiness of aircraft and aeronautical products. These ADs are considered legislative instruments, as outlined in the Legislative Instruments Act 2003. The ADs are issued in compliance with Annex 8 of the Convention on International Civil Aviation, which stipulates that the State of Design has overall responsibility for the continuing airworthiness of aircraft types. CASA, as Australia’s national airworthiness authority, is tasked with assessing information from the State of Design and, if necessary, issuing corresponding Australian ADs to ensure compliance with international standards. The ADs issued on or after 1 October 2009 are defined under CASR Part 39.001A, and this process is overseen by the Manager, Continuing Airworthiness within CASA’s Airworthiness and Engineering Branch.

Scope and Application

The Civil Aviation Regulations 1988, specifically concerning the revocation of Airworthiness Directives, applies to entities and individuals involved in the operation and maintenance of aircraft registered in Australia. This includes aircraft operators, maintenance organisations, and other stakeholders responsible for ensuring the continuing airworthiness of aircraft. The geographic scope of these regulations is national, as they pertain to all aircraft within the Australian Register. The Civil Aviation Safety Regulations 1998 empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives, which are legislative instruments subject to disallowance under the Acts Interpretation Act 1901. These directives are intended to maintain the safety standards for aircraft types as outlined in Annex 8 of the Convention on International Civil Aviation, where the State of Design holds primary responsibility for continuing airworthiness. The revocation of specific directives, such as AD/A320/146 Amendment 3, is based on the issuance of superseding directives by other regulatory authorities like the European Aviation Safety Agency (EASA). The application of these regulations is not restricted by any stated thresholds and extends to the entire registered fleet of Australian aircraft. Subordinate instruments may further define or modify the application of these regulations as necessary.

Key Provisions

The Civil Aviation Regulations 1988, under section 98 of the Civil Aviation Act 1988, allow the Governor-General to make regulations for the safety of air navigation. Specifically, regulation 39.001 of the Civil Aviation Safety Regulations 1998 empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for certain aircraft or aeronautical products. These ADs serve as a legislative instrument, as outlined in subregulation 39.001(5) and section 46A of the Acts Interpretation Act 1901, subject to the Legislative Instruments Act 2003. The ADs are also aligned with Annex 8 of the Convention on International Civil Aviation, which places the responsibility of ensuring the continuing airworthiness of an aircraft type on the State of Design. The State of Registry, on the other hand, is tasked with ensuring the airworthiness of individual aircraft. The obligations imposed by these regulations require CASA, as Australia's national airworthiness authority, to evaluate the airworthiness directives issued by the State of Design. If necessary, CASA must issue corresponding Australian ADs to mandate the requirements of the State of Design. This process ensures that the airworthiness directives align with the continuing airworthiness requirements of the Civil Aviation Safety Regulations. Furthermore, airworthiness directives issued by the State of Design on or after 1 October 2009 are specifically defined in CASR Part 39.001A. For instance, AD/A320/146 Amendment 3, which was superseded by EASA AD 2010-0071 issued on 15 April 2010, falls under this category. Failing to comply with these airworthiness directives may result in various consequences. The Civil Aviation Safety Regulations 1998 impose civil and criminal penalties for non-compliance. Specifically, section 94(1) of the Civil Aviation Act 1988 authorises CASA to enforce these regulations, and any breaches can lead to significant fines and other legal repercussions. It is crucial for all parties involved to adhere to these directives to ensure the safety and continued airworthiness of aircraft operating within Australia.