AD/LA-4/20 - Main Landing Gear - Rocker Castings P/N 2-4113-1 - Inspection and Replacement - CANCELLED

Overview

The Civil Aviation Act 1988 was enacted to address issues related to the regulation of civil aviation in Australia and to ensure the safety of air navigation. The Act empowers the Governor-General to create regulations in the interests of aviation safety, with the Civil Aviation Safety Regulations 1998 providing a framework for the issuance of airworthiness directives (ADs) by the Civil Aviation Safety Authority (CASA). These ADs, as legislative instruments, are essential for maintaining the continuing airworthiness of aircraft and are issued in line with the Convention on International Civil Aviation. The Civil Aviation Safety Regulations 1998 specify that CASA must assess foreign ADs and, if necessary, issue corresponding Australian ADs to ensure compliance with airworthiness standards. In the specific case of AD/LA-4/20 concerning Consolidated Aeronautics, Colonial LA-4 series aeroplanes, CASA has cancelled the directive due to the resolution of the unsafe condition, without the need for public consultation or a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation. This action was taken by the Manager, Airframe and Structures, in the Airworthiness Engineering Group, on behalf of CASA, in accordance with the Act's provisions.

Scope and Application

The Civil Aviation Act 1988, as supported by the Civil Aviation Safety Regulations 1998, provides a regulatory 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) for specific types of aircraft or aeronautical products, as stipulated in regulation 39.001. These directives serve as a legislative instrument, as outlined in section 46A of the Acts Interpretation Act 1901 and section 6 of the Legislative Instruments Act 2003. The ADs are integral to maintaining the continuing airworthiness of aircraft, with the State of Design being responsible for providing necessary information to the States of Registry, including Australia. Consequently, CASA, as Australia's national airworthiness authority, must review and, if appropriate, issue corresponding Australian ADs to enforce the safety requirements set forth by the State of Design. This process ensures that Australian-registered aircraft comply with international safety standards as mandated by Annex 8 to the Convention on International Civil Aviation. The issuance and cancellation of these directives are conducted in accordance with the legislative requirements and international obligations, without the need for public consultation or a Regulatory Impact Statement, as determined by the Office of Best Practice Regulation.

Key Provisions

The Civil Aviation Act 1988, under section 98, allows the Governor-General to enact regulations to ensure the safety of air navigation. This is further supported by regulation 39.001 of the Civil Aviation Safety Regulations 1998, which empowers the Civil Aviation Safety Authority (CASA) to issue airworthiness directives (ADs) for specific types of aircraft or aeronautical products. Section 39.001(5) of the same regulations clarifies that an AD is a disallowable instrument as per section 46A of the Acts Interpretation Act 1901, and consequently, an AD is considered a legislative instrument under section 6 of the Legislative Instruments Act 2003. Obligations under this legislation involve the State of Design and the State of Registry. The State of Design, as outlined in Annex 8 to the Convention on International Civil Aviation, bears the overall responsibility for ensuring the continuing airworthiness of an aircraft type, and must provide necessary information to appropriate States of Registry. Conversely, the State of Registry is responsible for the continuing airworthiness of individual aircraft and must establish or adopt requirements to maintain this airworthiness. In the context of Australia, CASA, as the national airworthiness authority, must evaluate any AD issued by a State of Design against an aircraft type on the Australian Register and, if necessary, issue an Australian AD to enforce the requirements stipulated by the State of Design. The Civil Aviation Act 1988 and associated regulations impose certain obligations on entities such as aircraft manufacturers and operators. These entities must comply with any ADs issued by CASA. For instance, Consolidated Aeronautics must adhere to any airworthiness directives affecting the Colonial LA-4 series aeroplanes, which was subject to AD/LA-4/20. CASA's assessment and subsequent cancellation of this AD on 2 July 2009, without the need for a replacement, signifies that the previously identified unsafe condition no longer exists. In terms of consequences, failure to comply with an AD can lead to significant civil and criminal penalties. Under the Civil Aviation Act 1988, non-compliance may result in fines and imprisonment. Specifically, section 187 provides for fines of up to 120,000 penalty units and imprisonment for up to 10 years for serious breaches, reflecting the high stakes involved in ensuring airworthiness and safety in aviation. The regulatory framework is designed to ensure that all parties involved in aviation operations adhere to stringent safety standards to protect public safety and maintain the integrity of the aviation system.