AD/CASA/20 - Corrosion of Rudder Torsion Tube

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, include specific provisions within Part 39 - 105 that address the safety and airworthiness of aircraft, including the issuance of airworthiness directives by the Civil Aviation Safety Authority (CASA). One such directive, AD/CASA/20, was introduced to address the problem of corrosion in the rudder torsion tube of the Casa 212 series aeroplanes. The directive was issued to ensure the safety of these aircraft by requiring action to be taken to mitigate the risk posed by corrosion, which has been identified as a significant issue due to water ingress through the space between the upper bearing and the fuselage structure. Compliance with this directive was mandated before 30 August 1996, aligning with the objective to maintain and enhance aviation safety standards in Australia.

Scope and Application

The Civil Aviation Regulations 1998, as amended, specifically address the safety standards and operational requirements for civil aviation within Australia, extending to all Australian territories and external operations involving Australian-registered aircraft. Within this regulatory framework, Part 39 - 105 pertains to Airworthiness Directives, including those issued by the Civil Aviation Safety Authority (CASA) to ensure the ongoing airworthiness of aircraft types, such as the Casa 212 series aeroplanes. This particular Airworthiness Directive, AD/CASA/20, mandates corrective actions for corrosion of the rudder torsion tube, a critical structural component, to prevent potential safety risks arising from water ingress. This directive applies to all models of the Casa 212 series aeroplanes and requires compliance by a specified date, ensuring that measures are implemented in accordance with CASA Safety Bulletin 212-27-34. The directive references a similar action by the Spanish DGAC AD 06/96, indicating international alignment in addressing this safety issue. There are no exclusions or exemptions specified in the directive, implying a mandatory requirement for all relevant aircraft operators within the Australian jurisdiction.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105 (subsections AD/CASA/20), address the safety directive concerning the corrosion of the rudder torsion tube for the Casa 212 Series aeroplanes. This directive mandates that all models of these aeroplanes must comply with the action outlined in CASA Service Bulletin 212-27-34. The directive references Spanish DGAC AD 06/96 for additional guidance. The requirement is that any identified corrosion in the rudder lower shaft and support structure must be addressed before 30 August 1996. The background for this directive indicates that corrosion has been detected due to water ingress through the gap between the upper bearing and the fuselage structure. The Civil Aviation Regulations impose several obligations on the parties and entities governed by this directive. Operators of the Casa 212 Series aeroplanes must ensure that the necessary inspections and repairs are carried out to prevent corrosion of the rudder lower shaft and support structure. This involves following the detailed procedures provided in CASA Service Bulletin 212-27-34, which likely includes inspection protocols, necessary repairs, and documentation of the work performed. Operators must complete these actions before the specified compliance date of 30 August 1996 to avoid non-compliance. Failure to adhere to this directive can lead to significant safety risks, including potential loss of control over the aircraft. Any breach of the Civil Aviation Regulations related to this directive can result in various penalties and consequences. The regulations do not specify exact penalties in the provided text, but breaches of aviation safety directives can typically lead to severe outcomes. These may include civil penalties, such as fines, as well as potential criminal charges if the breach results in harm or endangers public safety. The maximum penalties can vary, but they are often substantial, reflecting the critical importance of adhering to aviation safety standards. Non-compliance not only risks financial penalties but also poses serious safety hazards, which can result in severe repercussions for the operators and the aviation industry as a whole.