AD/DHC-8/19 - Brake Pressure Line

Overview

The Civil Aviation Regulations 1998, under Part 39 - 105, incorporate the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives to ensure the safe operation of aircraft within Australia. The legislation specifically addresses issues with the Bombardier (Boeing Canada/De Havilland) DHC-8 series aeroplanes, particularly focusing on a safety directive related to brake pressure lines. This directive, AD/DHC-8/19, was introduced to address the risk of hydraulic fluid loss due to a failed brake pressure line, which could lead to a complete loss of hydraulic system functionality and compromise aircraft safety. The enactment of this directive aligns with the policy objective of maintaining stringent safety standards in civil aviation, ensuring the airworthiness of aircraft by mandating compliance with technical requirements set by Transport Canada. The Civil Aviation (Safety) Regulations 1998 were enacted by the Parliament of the Commonwealth of Australia to provide a regulatory framework for ensuring the safety of civil aviation. This particular directive was incorporated to address a specific safety concern identified with the DHC-8 series aircraft, ensuring operators adhere to international safety standards and mitigate potential risks associated with hydraulic system failures.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 105, establish the scope and application of Airworthiness Directives (AD) concerning specific aircraft models and their compliance with safety standards. This particular legislative instrument applies to Bombardier (Boeing Canada/De Havilland) DHC-8 series 100 and 300 aeroplanes with serial numbers ranging from 3 to 321. The directive mandates compliance with the technical requirements outlined in Transport Canada's Airworthiness Directive CF-92-09, which was issued to address a safety issue involving the brake pressure line of these aircraft. The directive specifies that compliance must be achieved in accordance with the requirements detailed in the referenced Transport Canada document, with a compliance deadline set as of 30 June 1992. This legislative measure extends the application of the AD through subordinate instruments, ensuring that specified aircraft models adhere to the outlined safety standards to mitigate risks associated with hydraulic system failures.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, includes a Schedule of Airworthiness Directives (ADs) that govern the maintenance and operation of certain aircraft. In this context, AD/DHC-8/19 pertains to Bombardier (Boeing Canada/De Havilland) DHC-8 Series Aeroplanes (section 105). This directive is applicable to DHC-8 series 100 and 300 aircraft with serial numbers (S/No) ranging from 3 through 321. The directive mandates actions in accordance with the technical requirements outlined in Transport Canada's Airworthiness Directive CF-92-09. This requirement is referenced in de Havilland Service Bulletin No 8-29-21 and must be complied with as specified in the requirement document, with a revised effective date of 30 June 1992. The obligations imposed by AD/DHC-8/19 require operators and maintainers of DHC-8 series 100 and 300 aircraft within the specified serial number range to adhere to the technical guidelines provided by Transport Canada. This includes addressing the issue of brake pressure lines located downstream of the quantity limiting valve. The directive is designed to prevent incidents such as the loss of hydraulic fluid, which can lead to total loss of the No 1 system and subsequent depletion of the No 2 system, thus ensuring the safety of the aircraft's hydraulic systems. Failure to comply with AD/DHC-8/19 could result in serious safety implications, as illustrated by the background information detailing an incident where the failure of a brake pressure line resulted in a total loss of the No 1 system and compromised the No 2 system. The consequences of non-compliance may include grounding of the aircraft until the necessary actions are taken to rectify the issue. While specific penalties are not detailed in the excerpt, non-compliance with airworthiness directives can lead to significant regulatory action, including fines, operational restrictions, and potential legal proceedings under aviation safety laws. The Civil Aviation Regulations 1998 provide a framework for ensuring that aircraft meet certain safety standards. AD/DHC-8/19 is an essential component of this framework, specifically targeting the maintenance and operational safety of the DHC-8 series 100 and 300 aircraft. The directive's focus on preventing hydraulic system failures through the inspection and repair of brake pressure lines underscores the importance of adhering to such regulatory requirements. By ensuring compliance, operators and maintainers contribute to the overall safety and reliability of air travel.