AD/SF340/2 - Rudder Limiter High Speed Stop

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, govern the civil aviation industry, ensuring the safety and efficiency of air travel within the country. This regulatory framework includes provisions addressing airworthiness directives, such as AD/SF340/2 concerning the Saab SF340 Series Aeroplanes. This directive was introduced to address a specific safety concern identified in certain models of Saab SF340 aircraft, where the rudder limiter mechanism was found to exceed the required range of travel in higher speed ranges, potentially compromising the aircraft's safety and compliance with certification standards. The policy objective of this directive is to mandate corrective actions to ensure the aircraft meet necessary safety requirements, thereby enhancing the overall safety of civil aviation operations. The Civil Aviation Safety Authority, under the authority granted by the Civil Aviation Act 1988, issued this airworthiness directive to mandate specific modifications to the rudder limiter mechanism of Saab SF340 aircraft with serial numbers 340A-003 to -048. The directive requires compliance prior to 31 October 1985, ensuring that these aircraft meet the safety standards set forth by Swedish Airworthiness Directive No 1-006 and Saab-Fairchild Service Bulletin SF340-27-018. This directive aims to mitigate any risk associated with the identified safety issue, thereby maintaining high safety standards in civil aviation.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, establish the authority and scope of the Civil Aviation Safety Authority (CASA) in enforcing airworthiness directives. This particular regulation applies to all Saab SF340 series aeroplanes with serial numbers ranging from 340A-003 to 340A-048. The directive mandates that these aircraft comply with the action specified in the SAAB-Fairchild S.B. SF340-27-018 document, which relates to the modification of the rudder limiter mechanism to ensure compliance with certification requirements. This action must be carried out prior to 31 October 1985. The directive is not only applicable within the Australian jurisdiction but also aligns with Swedish AD No 1-006, indicating a cross-jurisdictional effort to standardise safety measures. The regulation does not specify any exclusions or exemptions, and compliance is mandatory for the specified aircraft models within the given timeframe.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives. Within this schedule, AD/SF340/2 pertains to the Saab SF340 series aeroplanes and is titled "Rudder Limiter High Speed Stop." This directive applies to all models with serial numbers 340A-003 to 340A-048 (1). The directive mandates action in accordance with SAAB-Fairchild S.B. SF340-27-018, and it is noted that Swedish AD No 1-006 is also relevant (2). The requirement for compliance with this directive was set prior to 31 October 1985 (3). The directive imposes specific obligations on the parties or entities it governs, requiring them to ensure that the rudder limiter mechanism on the affected Saab SF340 series aeroplanes is adjusted to reduce the range of travel in the higher speed range. This adjustment is necessary to meet certification requirements and ensure the safety and airworthiness of the aircraft. Compliance with this directive must be achieved before the specified deadline, underscoring the importance of timely action in maintaining safety standards (4). Failure to comply with the provisions of AD/SF340/2 may result in serious consequences. The legislation does not explicitly state the penalties for non-compliance, but it is implied that such failure could lead to significant safety risks and potential violations of aviation regulations. Non-compliance might also result in the grounding of affected aircraft until the required modifications are made, which could have substantial operational and financial implications for the operators of these aeroplanes. Ensuring adherence to the directive is therefore critical for the continued safe operation of the Saab SF340 series within Australian airspace (5).