AD/AC/26 - Elevator Torque Tube - Inspection and Modification

Overview

The Civil Aviation Regulations 1998, enacted by the Parliament of Australia, were established to regulate and ensure the safety of civil aviation within the country. One of the legislative instruments under this Act is the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which includes AD/AC/26 concerning the Elevator Torque Tube Inspection and Modification for Twin Commander (Gulfstream/Rockwell/ Aerocommander 500, 600 and 700) series aeroplanes. This directive applies to all models with serial numbers 1 to 1230, as specified in Aero Commander SL No. 124, and mandates compliance forthwith. The primary objective of this legislative instrument is to address potential safety concerns related to the elevator torque tube by requiring immediate inspection and necessary modifications to ensure the continued airworthiness of the affected aircraft.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, applies to all Twin Commander (Gulfstream/Rockwell/Aerocommander 500, 600 and 700) series aeroplanes with serial numbers ranging from 1 to 1230. This regulation mandates the inspection and modification of the elevator torque tube to ensure compliance with safety standards. The legislation is enforced by the Civil Aviation Safety Authority and applies across the Commonwealth of Australia, ensuring a uniform approach to aviation safety nationwide. Compliance with the Airworthiness Directives is mandatory and must be undertaken forthwith, as outlined in Aero Commander Service Letter No. 124. While the regulation broadly applies to the specified aircraft models and serial numbers, specific exclusions, exemptions, or thresholds are not detailed within the text of the legislative instrument. The scope of the Act may be further extended or restricted through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998 (Cth) outline specific requirements for maintaining the airworthiness of aircraft, with particular attention given to the Twin Commander series aeroplanes (sections 105 and 6/62). The regulation mandates an inspection and modification of the elevator torque tube for all Twin Commander models with serial numbers ranging from 1 to 1230. This directive is intended to ensure the structural integrity of the elevator system, which is critical for safe flight operations. The requirement for compliance is immediate, as indicated by the term "forthwith," necessitating that the inspection and any necessary modifications be carried out without delay. Entities governed by this regulation, such as aircraft operators and maintenance providers, are obligated to conduct a thorough inspection of the elevator torque tube in accordance with the specifications provided in Aero Commander Service Letter No. 124. This involves a detailed examination to identify any signs of wear, damage, or other issues that could compromise the safety of the aircraft. If any defects are found during the inspection, the relevant modifications must be implemented as per the guidelines to rectify the issues and restore the airworthiness of the aeroplane. Failure to comply with these airworthiness directives can result in serious consequences. The Civil Aviation Safety Authority (CASA) has the authority to take action against non-compliance. Potential penalties may include fines, suspension of the aircraft's airworthiness certificate, or other regulatory sanctions. The specific penalties for non-compliance are not detailed in the provided text, but they can be significant, reflecting the importance of adhering to these safety standards to protect flight safety and public welfare.