Overview

The Civil Aviation Regulations 1998, under PART 39 - 105, was enacted by the Commonwealth of Australia to establish and maintain airworthiness standards that ensure the safety of civil aviation. One specific legislative instrument within this framework is AD/B767/2, aimed at addressing issues related to the ram air turbine rotary actuator in Boeing 767 series aeroplanes. This instrument was introduced to rectify a problem where moisture accumulation on the rotary actuator brake assembly could lead to freezing under certain conditions, potentially rendering the ram air turbine deployment system inoperative. The policy objective of AD/B767/2 is to replace the affected rotary actuator with a specified model and to test the ram air turbine deployment system in accordance with prescribed Boeing service bulletins or their approved revisions. The requirement mandates compliance before 31 July 1985 to ensure the continued safety and airworthiness of the aircraft involved. The instrument was enacted by the Civil Aviation Safety Authority, which is responsible for ensuring that aviation safety regulations are effectively implemented and adhered to. This legislative measure highlights the importance of maintaining rigorous safety standards in civil aviation to prevent potential operational failures that could compromise flight safety. By mandating specific actions to replace and test the rotary actuator, the legislation aims to mitigate the risk of the ram air turbine becoming inoperative, thereby safeguarding the aircraft and its occupants.

Scope and Application

The Civil Aviation Regulations 1998, as amended, apply to all operators and owners of Boeing 767 series aeroplanes that are equipped with a ram air turbine rotary actuator with part number S258T711-3. This regulation is issued by the Civil Aviation Safety Authority (CASA) and applies across the Commonwealth of Australia, thereby establishing a uniform standard for airworthiness directives nationwide. The directive specifically mandates the replacement of the rotary actuator part number S258T711-3 with part number S258T711-4 to prevent potential system failures due to moisture accumulation and freezing under specific conditions. Compliance with these directives is non-negotiable, with a specified deadline of 31 July 1985, ensuring that all affected aircraft meet the safety requirements stipulated by CASA. The regulation does not specify any exclusions or exemptions but implicitly applies to all relevant aircraft within the jurisdiction of the Commonwealth. This directive can be further elaborated or modified through subordinate instruments issued by CASA to address any evolving safety concerns or technological advancements.

Key Provisions

The Civil Aviation Regulations 1998, specifically within Part 39 - 105 Civil Aviation Safety Authority Schedule of Airworthiness Directives for Boeing 767 Series Aeroplanes, detail the mandatory requirements for the replacement and testing of the ram air turbine rotary actuator. Section AD/B767/2 mandates that all Boeing 767 models equipped with the specified ram air turbine rotary actuator P/No. S258T711-3 must replace this component with the new rotary actuator P/No. S258T711-4. Furthermore, it requires that the ram air turbine deployment system be tested in accordance with the specifications provided in Boeing Service Bulletin 767-29-17, Revision 2, dated 29 June 1984, or any subsequent approved revision. The directive references FAA AD 84-25-03 Amendment 39-4969 for additional context. Entities governed by these regulations are required to ensure that the specified replacement of the rotary actuator is carried out correctly and that the testing of the deployment system is performed according to the prescribed Boeing Service Bulletin. This involves meticulous adherence to the outlined procedures and ensuring that all components are installed and tested as specified to maintain airworthiness standards. The directive necessitates that these actions be completed before 31 July 1985 to comply with safety regulations and avoid potential operational issues. Failure to comply with the requirements set forth in this Airworthiness Directive may result in serious safety concerns, as moisture accumulation on the rotary actuator brake assembly can lead to freezing under certain conditions, causing the brake rotor to freeze to the brake armature. This could render the ram air turbine deployment system inoperative, posing significant risks to aircraft safety. The potential consequences for non-compliance include severe operational disruptions and possibly grounding of the aircraft until the necessary actions are taken to rectify the issue. The Civil Aviation Regulations 1998 also outline potential penalties and consequences for breaches of these provisions. While specific penalties are not detailed in the provided text, general regulatory frameworks often impose fines, enforcement actions, or other legal repercussions for non-compliance with airworthiness directives. Ensuring compliance with these regulations is critical to maintaining the safety and operational integrity of the aircraft, thereby safeguarding both the crew and passengers.