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.
In this case, the state of design (The FAA) did not choose to raise an AD to address the unsafe condition despite intense lobbying by CASA, but the European Aviation Safety Authority (EASA) raised an AD earlier this year to replace the blades.
In line with EASA’s action, CASA has raised AD/R22/53 to correct the unsafe situation on R22 helicopters. This AD mandates the replacement of P/N A016-2 main rotor blades with the improved design P/N A016-4 blade. The effect will be to mandate the manufacturers Service Bulletin SB-94, which strongly recommends replacement of P/N A016-2 blades with P/N A016-4 blades. It is aimed at addressing a serious safety problem that can result when internal cracking originating from the blade root fitting inboard bolt hole leads to catastrophic fatigue failure of the main rotor blade. Three fatal accidents in Australia were caused by this internal cracking problem.
CASA has consulted extensively with the Australian industry and public via a Notice of Proposed Rule Making (NPRM 0503CS) and a Notice of Final Rule Making (NFRM 0503CS). After considering the comments received, CASA has decided to proceed with raising this AD.
The Office of Regulatory Review has determined that ADs do not require a Regulatory Impact Statement.
The AD has been made by the General Manager, Manufacturing, Certification and New Technologies Office, on behalf of CASA, in accordance with subsection 84A (2) of the Act.
Overview
The Civil Aviation Act 1988, enacted to establish a framework for the regulation of civil aviation in Australia, is complemented by the Civil Aviation Safety Regulations 1998 which provide more specific safety requirements. This legislative framework empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) under regulation 39.001 of the Civil Aviation Safety Regulations, ensuring that aircraft maintain their airworthiness. These directives, which are considered legislative instruments under the Acts Interpretation Act 1901, are crucial in maintaining safety standards in line with international conventions, such as Annex 8 to the Convention on International Civil Aviation. The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 aim to ensure the safety of air navigation by allowing CASA to mandate necessary actions in response to identified safety issues, such as issuing ADs when required. This approach reflects the policy objective of maintaining high safety standards in Australian civil aviation, aligning with international best practices.
Scope and Application
The Civil Aviation Act 1988 and its associated Civil Aviation Safety Regulations 1998 provide the legislative framework for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). Under section 98 of the Act, the Governor-General may make regulations in the interests of air navigation safety, and regulation 39.001 specifically empowers CASA to issue ADs for types of aircraft or aeronautical products. These ADs, being disallowable instruments under the Acts Interpretation Act 1901, are classified as legislative instruments in accordance with the Legislative Instruments Act 2003. The scope of these regulations applies to all aircraft and aeronautical products within Australia’s jurisdiction, with CASA responsible for ensuring the continuing airworthiness of aircraft registered in Australia. The ADs issued by CASA are a response to safety concerns identified either by the State of Design or by other regulatory authorities such as the European Aviation Safety Authority (EASA). For instance, AD/R22/53 was issued following EASA's action to address a critical safety issue with R22 helicopters, mandating the replacement of specific rotor blades to prevent catastrophic failure. The process involves extensive consultation with industry and the public, as seen with the Notices of Proposed and Final Rule Making (NPRM 0503CS and NFRM 0503CS), although these ADs do not require a Regulatory Impact Statement.
Key Provisions
The Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 together establish the legal framework for issuing airworthiness directives (ADs) in Australia. Under section 98 of the Civil Aviation Act 1988, the Governor-General has the authority to make regulations in the interest of aviation safety, with regulation 39.001 specifically empowering the Civil Aviation Safety Authority (CASA) to issue ADs for aircraft types and aeronautical products. An AD is a legislative instrument, as stipulated by subregulation 39.001(5) of the Civil Aviation Safety Regulations 1998, which aligns with section 46A of the Acts Interpretation Act 1901 and section 6 of the Legislative Instruments Act 2003.
These regulations impose obligations on CASA to ensure the continuing airworthiness of aircraft registered in Australia. According to Annex 8 of the Convention on International Civil Aviation, the State of Design holds primary responsibility for the airworthiness of an aircraft type, while the State of Registry, in this case CASA, must implement the ADs issued by the State of Design or develop its own requirements to maintain airworthiness. When an AD is issued by another State, such as the European Aviation Safety Authority (EASA), CASA is required to evaluate the information and, if necessary, issue an Australian AD to enforce the requirements.
Failure to comply with an AD can lead to serious consequences. The Civil Aviation Safety Regulations 1998 do not explicitly list offences, penalties, or civil/criminal consequences for non-compliance with ADs; however, operating an aircraft that does not meet airworthiness standards can result in severe penalties under the Civil Aviation Act 1988. Such penalties may include fines, imprisonment, or both, depending on the severity of the breach and the impact on safety. CASA enforces these regulations rigorously to ensure the highest standards of aviation safety in Australia.