AD/BEECH 50/2 - Cylinder Head Thermocouple - CANCELLED

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Legislation au F2008L01206 Not in force Legislative Instrument

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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/BEECH 50/2 affecting Beechcraft 50 and B50 model aircraft with serial numbers prior to CH-45.  CASA has assessed this AD and as a result has cancelled Australian
AD/BEECH 50/2.  The cancellation will become effective on 8 May 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,  Systems and New Technologies in the Airworthiness Engineering Branch, on behalf of CASA, in accordance with subsection 84A (2) of the Act.

 

Overview

The Civil Aviation Act 1988 was enacted to provide a comprehensive legislative framework for civil aviation in Australia, aiming to ensure the safety and efficiency of air navigation. The Act empowers the Governor-General to make regulations in the interests of air navigation safety, including the issuance of airworthiness directives by the Civil Aviation Safety Authority (CASA) as stipulated in the Civil Aviation Safety Regulations 1998. These directives are crucial for maintaining the continuing airworthiness of aircraft, aligning with international obligations under the Convention on International Civil Aviation. CASA, acting as Australia’s national airworthiness authority, is responsible for assessing and implementing such directives, ensuring compliance with safety standards. The authority exercised under the Act is intended to safeguard public safety by enforcing stringent airworthiness requirements, reflecting a policy objective to harmonise domestic regulations with international safety standards.

Scope and Application

The Civil Aviation Act 1988, in conjunction with the Civil Aviation Safety Regulations 1998, establishes the framework within which airworthiness directives (ADs) are issued to ensure the safety of air navigation in Australia. Under the Act, the Governor-General has the authority to make regulations that are in the interest of the safety of air navigation, and regulation 39.001 of the Civil Aviation Safety Regulations 1998 grants the Civil Aviation Safety Authority (CASA) the power to issue ADs for specific types of aircraft or aeronautical products. The ADs are legislative instruments, which means they are subject to disallowance under section 46A of the Acts Interpretation Act 1901 and are considered legislative instruments under the Legislative Instruments Act 2003. The ADs are aligned with the requirements of Annex 8 to the Convention on International Civil Aviation, where the State of Design has responsibility for the continuing airworthiness of aircraft types, and the State of Registry is responsible for ensuring the continuing airworthiness of individual aircraft within its jurisdiction. When a State of Design issues an AD, CASA must assess and, if necessary, issue an Australian AD to ensure compliance with international standards. The issuance, amendment, or cancellation of these directives is overseen by the Manager, Systems and New Technologies in the Airworthiness Engineering Branch on behalf of CASA, in accordance with the Act.

Key Provisions

The main operative sections of the Civil Aviation Act 1988 and the Civil Aviation Safety Regulations 1998 (CASR) focus on the issuance and regulation of airworthiness directives (ADs). Section 98 of the Civil Aviation Act 1988 grants the Governor-General the power to create regulations for air navigation safety, while regulation 39.001 of the CASR empowers CASA to issue ADs for certain types of aircraft and aeronautical products. Furthermore, subregulation 39.001(5) specifies that an AD is a disallowable instrument, making it a legislative instrument under the Legislative Instruments Act 2003. These provisions ensure that ADs are legal instruments designed to maintain the airworthiness of aircraft. The obligations imposed by the Act and the CASR are multifaceted. The State of Design has the primary responsibility for the continuing airworthiness of an aircraft type, as outlined in Annex 8 to the Convention on International Civil Aviation. This responsibility includes providing necessary information to ensure the airworthiness of aircraft to the States of Registry. The State of Registry, in turn, must develop or adopt requirements to ensure the continuing airworthiness of aircraft registered within its territory. CASA, as Australia's national airworthiness authority, must assess information from the State of Design and issue an Australian AD if necessary to comply with international obligations. Under these provisions, CASA has issued and subsequently cancelled an airworthiness directive (AD/BEECH 50/2) affecting Beechcraft 50 and B50 model aircraft with serial numbers prior to CH-45. The cancellation of this AD, effective from 8 May 2008, is due to the resolution of the unsafe condition identified in the original directive. This action was taken in accordance with Australia's obligations under the Convention on International Civil Aviation, and no replacement AD is required. Given that this cancellation aligns with international obligations, it did not necessitate consultation with the Australian public or a Regulatory Impact Statement. The consequences of breaching the provisions of the Civil Aviation Act 1988 and the CASR can be severe. Violation of ADs can result in significant safety risks, leading to potential civil or criminal penalties. For example, operating an aircraft that does not comply with an applicable AD can result in fines and imprisonment, with penalties varying depending on the severity of the breach. Under the Civil Aviation Act, failure to comply with an AD can result in a fine of up to $275,000 for individuals and $1.375 million for corporations, along with potential imprisonment. These penalties underscore the importance of adhering to airworthiness directives to maintain safety standards in civil aviation.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.