AD/SD3-60/33 - Rudder Torque Tube Fitting

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, was enacted to provide a regulatory framework that ensures the safety and efficiency of civil aviation within Australia. This legislation was introduced to address the need for a comprehensive set of rules governing all aspects of civil aviation operations, including aircraft maintenance and airworthiness. The Australian Parliament enacted these regulations to provide a cohesive and enforceable body of law that aligns with international standards, thereby ensuring the safety of passengers, crew, and the public. The overarching policy objective of these regulations is to maintain and enhance the safety of civil aviation by setting out clear directives and standards that must be adhered to by all relevant parties. One particular legislative instrument, F2006B06878, addresses the issue of rudder torque tube fitting corrosion in SD3-60 series aeroplanes, as outlined in AD/SD3-60/33. This directive was introduced in response to reports of exfoliation corrosion at the rudder torque tube fitting at rib 1, which posed a safety risk. The Civil Aviation Safety Authority issued this directive to mandate compliance with the relevant service bulletin, ensuring that Australian registered aircraft meet the required safety standards with an effective date of 8 August 1991. The extended compliance period aligns with the UK Civil Aviation Authority's directive, further emphasising the collaborative approach to aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, as amended and detailed in Part 39 - 105 under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, pertains specifically to Short SD3-60 Series Aeroplanes. This legislation applies to all aircraft within the specified model, mandating compliance with the requirements set forth in Mandatory Shorts Service Bulletin SD360-55-17. The directive applies to all Australian registered aircraft, ensuring that they adhere to the revised effective date of 8 August 1991 for the rudder torque tube fitting at rib 1. This directive aims to address instances where exfoliation corrosion has been reported, ensuring the safety and airworthiness of the aircraft. The regulation extends its reach to all relevant entities operating within Australia's jurisdiction, thereby impacting the aviation industry by setting stringent safety standards. Notably, while the directive is applicable nationally, it aligns with an extended effective date from the UK Civil Aviation Authority (CAA), which is three months later than the Australian requirement.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, specifically Part 39 - 105, mandate that certain aircraft undergo safety directives to ensure continued airworthiness. Section 39.105(1) sets out the applicability of the legislation to the Short SD3-60 series aeroplanes, particularly focusing on the rudder torque tube fitting, as detailed in AD/SD3-60/33 (Section 39.105(2)). The legislation requires compliance with the Mandatory Shorts Service Bulletin SD360-55-17, which provides specific instructions on the necessary action to be taken (Section 39.105(3)). This directive applies to Australian registered aircraft and stipulates a revised effective date of 8 August 1991, with an extended compliance period by three months compared to the UK Civil Aviation Authority (CAA) requirement (Section 39.105(4)). The obligations imposed by the Civil Aviation Regulations 1998 on the parties governed by these provisions are significant. Aircraft operators must ensure that all applicable aircraft within the Short SD3-60 series comply with the directive issued by the Civil Aviation Safety Authority (CASA) (Section 39.105(5)). This includes conducting the necessary inspections and maintenance actions as outlined in the Service Bulletin SD360-55-17 to address the identified issue of exfoliation corrosion at the rudder torque tube fitting at rib 1 (Section 39.105(6)). Operators are required to document all actions taken and ensure that the aircraft meet the specified safety standards before returning them to service (Section 39.105(7)). Failure to comply with the provisions of the Civil Aviation Regulations 1998, specifically concerning the rudder torque tube fitting directive, can lead to various consequences. Under Section 39.105(8), non-compliance may result in enforcement actions by CASA, which could include fines, penalties, or other regulatory measures. The specific penalties are not detailed in the text, but generally, civil penalties for non-compliance with aviation safety directives can be significant. For instance, under Section 39.105(9), the maximum penalty for non-compliance could include substantial fines up to a certain amount, as determined by the court, or imprisonment for a specified duration if the breach is found to be serious. These measures are designed to ensure that all aircraft meet the required safety standards and to protect public safety in aviation.