AD/AC/61 Amdt 1 - Elevator Trim Sprocket Assembly - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, represent a comprehensive framework governing the safety and operational standards for civil aviation within the country. One specific amendment introduced under these regulations, F2006B02120, pertains to the Twin Commander series aeroplanes, namely the Gulfstream/Rockwell/Aerocommander 500, 600, and 700. This amendment, specifically AD/AC/61 Amendment 1, was introduced to address issues related to the elevator trim sprocket assembly, mandating inspections and modifications to ensure airworthiness. The directive, applicable as referenced in Service Letter No. 317 by Rockwell International, requires compliance within stringent timeframes to maintain safety standards, with a Category 1 compliance mandate demanding action within 100 hours’ time in service following 30 September 1978, and an absolute deadline of 1 September 1979. The overarching policy objective is to mitigate potential safety risks associated with the identified component, thereby enhancing overall aviation safety.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to the maintenance and operation of Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) series aeroplanes within Australia. This legislation mandates that operators and owners of these aircraft must comply with Airworthiness Directives (AD) issued by the Civil Aviation Safety Authority (CASA). The scope of the regulation extends to ensuring that the elevator trim sprocket assembly is inspected and modified as per the directive, which is particularly relevant for aircraft that have accrued 100 hours of service time after 30 September 1978 and must meet the compliance requirements before 1 September 1979. The directive is applicable to all operators within the Commonwealth of Australia, encompassing both private and commercial aviation sectors that involve these specific aircraft models. While the regulation is comprehensive, it is important to note that any exclusions or exemptions are not specified within the text provided. The regulation's application can also be extended or restricted through subordinate instruments, which may provide further clarifications or additional requirements.

Key Provisions

The Civil Aviation Regulations 1998, under PART 39 - 105, specifically address the airworthiness directives for certain aircraft models, including the Twin Commander series aeroplanes manufactured by Gulfstream/Rockwell/Aerocommander (sections 39-105(1) and (2)). These directives mandate compliance with specific maintenance and inspection protocols to ensure the safety and airworthiness of the aircraft. One such directive, AD/AC/61, pertains to the Elevator Trim Sprocket Assembly, necessitating an inspection and potential modification. This directive was issued as Amendment 1 and is applicable to aircraft within the specified series as referenced in SL No. 317, which was documented under Rockwell International. Compliance with these airworthiness directives is crucial for the operators and owners of the affected aircraft. According to the regulations, compliance for the Elevator Trim Sprocket Assembly must be achieved within 100 hours of time in service after 30 September 1978, or before 1 September 1979, as outlined in section 39-105(3). These requirements ensure that the necessary maintenance and modifications are performed in a timely manner to mitigate any potential safety risks associated with the Elevator Trim Sprocket Assembly. Failure to comply with the airworthiness directives set out in the Civil Aviation Regulations 1998 may result in significant consequences. Non-compliance could potentially lead to aircraft being deemed unairworthy, which could result in grounding of the aircraft and cessation of operations. Furthermore, operators and owners who fail to adhere to these directives may face regulatory action, including fines and other penalties as stipulated by the relevant aviation authorities. In cases where non-compliance leads to safety incidents or accidents, there could be additional civil or criminal liabilities imposed upon the responsible parties. The penalties for non-compliance with the Civil Aviation Regulations 1998 are intended to enforce adherence to safety standards and ensure the highest level of safety in aviation operations. The maximum penalties for breaches of these regulations can include substantial fines and, in severe cases, imprisonment for individuals found guilty of violations that result in serious harm or loss of life. The regulatory framework is designed to protect the public and ensure that all aviation activities are conducted in a manner that prioritises safety and compliance with established standards.