AD/BEECH 56/21 - Control Surface Trim Tab Systems

Overview

The Civil Aviation Regulations 1998, which were enacted to regulate and ensure the safety of civil aviation within Australia, include Part 39 - 105, which outlines the authority and processes for issuing airworthiness directives. One such directive, AD/BEECH 56/21, specifically addresses the control surface trim tab systems of Beechcraft 56TC (Turbo Baron) Series aeroplanes. This directive was introduced to address the problem of accumulative wear in control linkage and actuators that could lead to excessive free play in the control surface trim tabs, thereby compromising flight safety. The Civil Aviation Safety Authority, as the enacting body, has mandated this directive to ensure compliance within specified intervals, thereby aiming to maintain the airworthiness of the affected aircraft models. The policy objective of this airworthiness directive is to ensure that all models 56TC and A56TC with serial numbers TG-2 to TG-94 comply with the inspection and maintenance requirements outlined in Beechcraft Service Instruction No. 0846-152, Rev. 2. Compliance must be achieved within 100 hours of time in service after 30 June 1980 and subsequently at intervals not exceeding 100 hours of time in service. This directive underscores the commitment to stringent safety standards and the ongoing maintenance of aircraft to mitigate potential risks associated with control surface issues.

Scope and Application

The Civil Aviation Regulations 1998, as amended, under Part 39 - 105 specifically address the airworthiness directives for Beechcraft 56TC (Turbo Baron) Series Aeroplanes. This legislative instrument applies to all models 56TC and A56TC with serial numbers ranging from TG-2 to TG-94. The scope of the regulation mandates compliance with the requirements set forth in Beechcraft Service Instruction No. 0846-152, Revision 2. The regulation stipulates that the action must be taken within 100 hours of time in service after 30 June 1980, and subsequently, at intervals not exceeding 100 hours of time in service. This requirement is integral to maintaining the airworthiness of the aircraft by ensuring that control surface trim tab free play does not exceed specified limits due to wear in the control linkage and actuators. The geographic reach of this regulation is nationwide, applying to all relevant aircraft within Australia's jurisdiction, thereby ensuring uniform safety standards across the civil aviation industry.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically Part 39 - 105, concerning the Beechcraft 56TC (Turbo Baron) Series Aeroplanes, involve Airworthiness Directives. Section AD/BEECH 56/21 pertains to the control surface trim tab systems of these aircraft models. The directive applies to all models 56TC and A56TC with serial numbers ranging from TG-2 to TG-94. The primary requirement, as outlined in the directive, is for action to be taken in accordance with Beechcraft Service Instruction No. 0846-152, Revision 2. This action involves ensuring compliance with the inspection procedure that defines the maximum allowable free play in the control surface trim tabs, which is caused by accumulative wear in the control linkage and actuators. The obligations imposed by this Act on the relevant parties, primarily aircraft operators and maintenance personnel, are significant. They must adhere to the inspection and action requirements specified in the Beechcraft Service Instruction. This entails conducting inspections within 100 hours of time in service after 30 June 1980, and then at intervals not exceeding 100 hours’ time in service thereafter. This ensures that the control surface trim tabs are within the allowable limits for free play, thereby maintaining the aircraft’s airworthiness and safety standards. Non-compliance with the requirements set forth in the Civil Aviation Regulations can result in serious consequences. The Act provides for various civil and criminal penalties for breaches. In civil terms, failure to adhere to the Airworthiness Directives can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions may include fines, mandatory corrective actions, or even grounding of the aircraft until compliance is achieved. In more severe cases, criminal charges could be brought against individuals responsible for the non-compliance, potentially leading to imprisonment. The maximum penalties for offences under the Civil Aviation Act 1988 can include fines up to $165,000 for individuals and $825,000 for corporations, alongside potential imprisonment terms of up to five years. The gravity of these consequences underscores the importance of strict adherence to the regulations to ensure aviation safety.