AD/AC/35 - Rudder Torque Tube - Modification

Overview

The Civil Aviation Regulations 1998, amended by the legislative instrument F2006B02093, was enacted to maintain and enhance the safety standards within the aviation industry in Australia. This regulation specifically addresses the issue of ensuring the airworthiness of certain aircraft models by introducing mandatory modifications to critical components such as the rudder torque tube in the Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) series aeroplanes. The regulation was introduced by the Commonwealth of Australia and is administered by the Civil Aviation Safety Authority (CASA). The overarching policy objective is to mitigate potential safety risks associated with the identified components, ensuring that all affected aircraft meet stringent safety standards before continuing operations. Compliance with these directives is mandatory, with a specific requirement for modifications to be completed within 100 hours’ time in service after the directive was issued on 7 September 1967.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, governs the issuance of airworthiness directives which are essential for maintaining the safety standards of aircraft operations within Australia. The particular legislation, F2006B02093, pertains to the Twin Commander series of aeroplanes, namely the Gulfstream/Rockwell/Aerocommander 500, 600, and 700 models, focusing on the rudder torque tube modification as outlined in AD/AC/35. This directive applies to all models within the specified series with serial numbers ranging from 2 to 1727, as referenced in the Aero Commander SL No. 203. Compliance with this directive is mandatory, requiring that the modification be implemented within 100 hours of the aeroplane's time in service after 7 September 1967, ensuring that the safety standards are met within a clearly defined timeframe. The regulation's jurisdiction is under the Commonwealth of Australia, making it applicable across the nation, and while the directive itself does not specify exclusions or exemptions, any such provisions would likely be detailed in subordinate instruments or accompanying guidance.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, include a schedule of airworthiness directives that pertain to certain aircraft models. One such directive, AD/AC/35, focuses on the modification of the rudder torque tube for Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) series aeroplanes (section 12/67). This directive applies to all models with serial numbers from 2 to 1727 and references Aero Commander Service Letter No. 203. The key requirement is that the specified modification must be completed within 100 hours of time in service after 7 September 1967. Entities governed by this directive must ensure that the rudder torque tube modifications are carried out as specified within the stipulated timeframe. This involves detailed technical work to ensure the structural integrity and safety of the aircraft. Compliance with this directive is mandatory, and failure to adhere to the requirements can result in significant safety risks. In terms of obligations, the entities responsible for the aircraft must maintain detailed records of the modifications performed, including dates and signatures of authorised personnel. This documentation is crucial for demonstrating compliance and for any future audits or inspections by the Civil Aviation Safety Authority. Additionally, the directive may necessitate additional inspections or maintenance checks to verify that the modifications have been correctly implemented. Failure to comply with the airworthiness directive can lead to severe consequences. The Civil Aviation Regulations 1998 impose civil penalties for non-compliance, which can include fines up to the maximum prescribed by law. In more severe cases, continued operation of a non-compliant aircraft may result in the grounding of the aircraft, which can have significant operational and financial implications for the operators. Furthermore, persistent non-compliance could lead to criminal charges against responsible individuals, including imprisonment, depending on the severity and impact of the breach.