AD/G164/21 - Elevator Pushrods

Overview

The Civil Aviation Regulations 1998, as part of the Civil Aviation Safety Authority's (CASA) regulatory framework, were enacted to address the need for stringent oversight of aviation safety standards in Australia. The Regulations are designed to ensure the safe operation of aircraft within the country's airspace and encompass a range of directives aimed at maintaining airworthiness. One such directive is AD/G164/21, which pertains to the elevator pushrods of Schweizer (Grumman) G-164 (Ag-Cat) series aeroplanes. This directive was introduced in response to reported instances of corrosion and cracking in the elevator pushrods, which in one case resulted in the loss of an aircraft. The policy objective is to mandate specific maintenance actions in accordance with Schweizer G164 Service Bulletin No 85 and ensure ongoing compliance, thereby enhancing the safety of these aircraft. The Australian Government, through CASA, established this directive to mitigate the risks associated with the identified issues in the elevator pushrods of the affected aircraft models. By referencing the Federal Aviation Administration's AD 89-18-02, Amendment 39-6300, the Regulations align with international safety standards. The directive requires compliance prior to 18 November 1989 and mandates periodic checks at intervals not exceeding 12 months, ensuring that the identified safety concerns are systematically addressed. This regulatory approach underscores the commitment to maintaining high safety standards within the Australian aviation sector.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all Schweizer (Grumman) G-164 (Ag-Cat) Series Aeroplanes and mandates that these aircraft must adhere to the Airworthiness Directives outlined in the Civil Aviation Safety Authority Schedule. The directive applies to all models of the specified aeroplanes and requires action to be taken in accordance with Schweizer G164 Service Bulletin No 85. This legislation aims to address the issues of corrosion and cracking of the elevator pushrods, which have been reported to potentially lead to severe consequences, including loss of the aircraft. The directive is applicable both prior to and following 18 November 1989, with compliance required at intervals not exceeding 12 months. The scope of the legislation is national, as it is a Commonwealth regulation, and it extends its jurisdiction over all entities operating these aircraft within Australia. The regulations reference FAA AD 89-18-02, Amendment 39-6300, indicating that the Australian standards are aligned with international safety directives. The regulations do not explicitly state any exclusions or exemptions, thus imposing a broad requirement for compliance across the industry.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 and specifically Section 105, establish the requirements for maintaining the airworthiness of certain aircraft, including the Schweizer (Grumman) G-164 (Ag-Cat) Series Aeroplanes, by mandating adherence to specific safety directives. Section 105, identified as AD/G164/21, requires that action be taken on the elevator pushrods in accordance with Schweizer G164 Service Bulletin No 85. This directive references FAA AD 89-18-02, Amendment 39-6300, which is crucial for compliance purposes. The applicability of these regulations extends to all models of the Schweizer (Grumman) G-164 series, and compliance must be achieved before 18 November 1989, with subsequent checks to be conducted at intervals not exceeding 12 months. The obligations imposed by this legislation require aircraft operators and owners to strictly follow the guidelines set forth in Schweizer G164 SB No 85. This includes inspecting and, if necessary, replacing or repairing the elevator pushrods to prevent corrosion and cracking, which have been reported by the manufacturer as potentially leading to catastrophic failures, such as the loss of the aircraft. The regulations mandate that these actions must be completed before the specified compliance date, and that regular maintenance checks must be performed thereafter to ensure ongoing airworthiness. Failure to comply with the provisions of these regulations can result in severe consequences. Civil Aviation Safety Authority (CASA) may take enforcement actions against non-compliant aircraft, which can include grounding the aircraft, imposing fines, or even prosecuting individuals or entities in a court of law. While the specific penalties are not detailed in the legislative instrument, the potential for civil or criminal liability underscores the importance of adhering to the airworthiness directives. Operators and owners are, therefore, obligated to ensure that their maintenance practices align with the regulatory requirements to avoid any legal repercussions.