AD/ENG/4 Amdt 10 - Piston Engine Continuing Airworthiness Requirements

Overview

The Civil Aviation Act 1988 was enacted to establish a comprehensive regulatory framework for civil aviation in Australia, with a primary focus on ensuring the safety of air navigation. This legislation empowers the Governor-General to make regulations that align with the Act’s objectives, thereby facilitating the efficient and safe operation of aircraft within Australian airspace. Under the authority granted by section 98, the Civil Aviation Safety Regulations 1998 were subsequently introduced, which include provisions for the issuance of airworthiness directives (ADs). These ADs are legislative instruments designed to address potentially unsafe conditions in aircraft and aeronautical products, ensuring that they meet the necessary safety standards. The policy objective is to maintain the continuing airworthiness of aircraft by mandating specific actions or requirements, as identified by the Civil Aviation Safety Authority (CASA), Australia's national airworthiness authority.

Scope and Application

The Civil Aviation Act 1988 and its accompanying regulations, including the Civil Aviation Safety Regulations 1998, establish a framework for ensuring the safety of air navigation in Australia. Under this framework, the Civil Aviation Safety Authority (CASA) has the authority to issue airworthiness directives (ADs) that are applicable to specific kinds of aircraft or aeronautical products. These directives are legislative instruments that mandate actions to maintain or improve the safety standards of aviation. The ADs are issued by CASA to ensure that the continuing airworthiness of aircraft registered in Australia meets the necessary safety requirements. These directives apply to all entities and individuals involved in the maintenance and operation of the specified aircraft within Australia, including operators, maintenance service providers, and aircraft owners. The regulations also incorporate international standards set by the International Civil Aviation Organization (ICAO), ensuring that Australia’s safety measures are aligned with global best practices. The ADs issued by CASA extend across the entire Australian jurisdiction, ensuring consistent application and enforcement of safety regulations throughout the country. While the ADs generally apply to all relevant entities and aircraft, there may be specific exclusions or exemptions as detailed in the regulations themselves. Furthermore, the application and enforcement of these directives can be extended or restricted through subordinate instruments, aligning with broader regulatory frameworks and amendments.

Key Provisions

The Civil Aviation Safety Regulations 1998, under regulation 39.001, empower the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products, as stated in section 98 of the Civil Aviation Act 1988. An AD is a legislative instrument that serves as a regulatory tool to maintain the safety of aircraft in operation. Subregulation 39.001(5) clarifies that an AD is a disallowable instrument under section 46A of the Acts Interpretation Act 1901 and is subject to the provisions of the Legislative Instruments Act 2003. These airworthiness directives are essential in ensuring the continuing airworthiness of aircraft. The State of Design, which is the country where the aircraft is designed, bears the primary responsibility for the ongoing airworthiness of an aircraft type, as stipulated in Annex 8 to the Convention on International Civil Aviation. The State of Design must provide necessary information to the appropriate States of Registry to maintain the airworthiness of the aircraft type. The State of Registry, in turn, must develop or adopt requirements to ensure that aircraft under its jurisdiction remain airworthy. When a State of Design issues an AD, CASA, as Australia's national airworthiness authority, must assess the information and, if necessary, issue an Australian AD to enforce the requirements. CASA has issued AD/ENG/4 to address a potentially unsafe situation concerning the maintenance of aircraft piston engines under CASA Schedule 5 of maintenance as per CAR42B. This directive mandates engine checks and specifies overhaul periods for engines in charter operations, areas not previously covered by CASA maintenance schedule 5. The directive is currently being updated to Amendment 10, prompted by the Australian Transport Safety Bureau (ATSB), to clarify the compliance intervals for cylinder compression checks. This amendment does not introduce new requirements, and CASA has not consulted with the Australian industry and public due to the limited scope of the changes. The Office of Regulatory Review has confirmed that ADs do not require a Regulatory Impact Statement, and the AD was made by the General Manager of the Manufacturing, Certification and New Technologies Office on behalf of CASA, in accordance with subsection 84A(2) of the Act. For entities and individuals governed by the Civil Aviation Safety Regulations 1998, compliance with ADs is mandatory. Failure to adhere to the requirements set out in an AD can lead to serious consequences. While specific penalties for non-compliance are not detailed in the text, it is understood that breaches of ADs can result in both civil and criminal penalties. Civil penalties may include fines, while criminal penalties can include imprisonment. The exact penalties depend on the severity of the breach and the specific provisions of the Civil Aviation Act 1988 and related regulations. It is critical for all stakeholders to understand and comply with ADs to ensure the safety of air navigation and avoid legal repercussions.