Overview

The Civil Aviation Regulations 1998, enacted by the Australian Parliament, form a comprehensive legal framework governing civil aviation within Australia. Part 39 of these regulations specifically addresses airworthiness, aiming to ensure that aircraft and aeronautical products meet necessary safety standards. One notable legislative instrument under these regulations is the Airworthiness Directive (AD) for Boeing 767 Series Aeroplanes, specifically AD/B767/175 concerning thrust reverser wiring, issued in 2002 by the Civil Aviation Safety Authority (CASA). This directive was introduced to address a safety issue where inadequate separation of control wiring for the thrust reverser actuation system could potentially lead to uncommanded deployment of a thrust reverser, compromising the aircraft's controllability. The directive mandates the re-routing of wire bundle W518 and requires a functional test to be performed to mitigate this risk, ensuring compliance within a specified timeframe.

Scope and Application

The Civil Aviation Regulations 1998, as amended, under the authority of the Civil Aviation Act 1988, govern aviation safety in Australia and include specific directives to ensure the airworthiness of aircraft. This particular Airworthiness Directive (AD) applies to Boeing 767-300 series aeroplanes, specifically line numbers 001 through 810 inclusive, which are equipped with Rolls Royce RB211-524H series engines. The AD mandates the re-routing of wire bundle W518, which is situated along the leading edge of the right wing, to prevent potential uncommanded deployment of a thrust reverser, thereby maintaining the aircraft's controllability. This directive became effective on 5 September 2002, with a compliance deadline of 36 months from this date for re-routing the wire bundle, and requires functional testing before the next flight following the re-routing. This AD is applicable nationally, extending across the Commonwealth of Australia, and ensures that the specified aircraft meet the necessary safety standards set by the Civil Aviation Safety Authority (CASA).

Key Provisions

The main operative sections of this Airworthiness Directive (AD) revolve around ensuring the safety of Boeing 767-300 series aeroplanes equipped with Rolls Royce RB211-524H series engines. Specifically, the AD requires the re-routing of wire bundle W518 along the leading edge of the right wing, as detailed in Boeing Service Bulletin (SB) 767-78-0085, dated 8 November 2001. This action aims to prevent potential issues arising from inadequately separated control wiring for the thrust reverser actuation system, which could otherwise lead to uncommanded deployment and reduced controllability of the aircraft. Furthermore, the AD mandates a functional test of the re-routed wiring before the next flight after completing the re-routing process. The obligations imposed by this AD are clear and precise. Aircraft operators must ensure that the re-routing of wire bundle W518 is completed within 36 months from the effective date of the AD, which was 5 September 2002. Additionally, the functional test specified in SB 767-78-0085 must be performed before the next flight following the re-routing of wire bundle W518. These requirements are designed to maintain the airworthiness of the aircraft and ensure the safety of all passengers and crew. Failure to comply with the provisions of this AD could result in severe consequences. While the specific civil or criminal penalties are not detailed in the AD, non-compliance with Airworthiness Directives is generally taken very seriously by the Civil Aviation Safety Authority (CASA). Such non-compliance could potentially lead to grounding of the aircraft, fines, and other regulatory actions. Given the critical nature of the safety measures outlined in this AD, violations could also result in severe operational disruptions and safety risks, highlighting the importance of strict adherence to these requirements.