AD/DH114/48 - Aileron Mass Balance Weight Assembly

Overview

The Civil Aviation Regulations 1998 were enacted to establish a comprehensive regulatory framework governing civil aviation operations within Australia, ensuring safety and efficiency in air travel. Part 39, specifically, addresses airworthiness directives, which are legally enforceable rules related to the design, construction, maintenance, and operation of aircraft. One such directive, AD/DH114/48, pertains to the aileron mass balance weight assembly of DH114 (Heron) series aeroplanes. This directive was introduced in response to a reported case of severe internal corrosion that could lead to aileron flutter or severe handling problems, thereby posing significant safety risks. The Civil Aviation Safety Authority, under the authority of the Secretary, mandates compliance with specific technical notices or approved inspection schemes to mitigate these risks. The overarching policy objective is to maintain the highest standards of aviation safety by addressing and rectifying potential hazards proactively.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to Airworthiness Directives for the DH114 (Heron) Series Aeroplanes, with the directive AD/DH114/48 focusing on the Aileron Mass Balance Weight Assembly. This regulation applies to all models of the DH114 series aeroplanes, and its geographic reach is within the Commonwealth of Australia, governed by the Civil Aviation Safety Authority. The directive requires compliance with British Aerospace Technical Notice W19 Issue 1 or an inspection scheme approved by the Secretary, with specific actions to be taken no later than 31 August 1987. The requirement mandates adherence to the designated Requirement Document and mandates compliance at the next inspection for Maintenance Release issue following 30 June 1987 but no later than 31 August 1987. The directive is a response to a reported case of severe internal corrosion that could lead to aileron flutter or severe handling problems if the balance assembly is lost or fails. This regulation is enforced nationally under the authority of the Civil Aviation Safety Regulations and does not explicitly mention exclusions, exemptions, or thresholds in this directive but allows for further elaboration through subordinate instruments.

Key Provisions

The Civil Aviation Regulations 1998, under Part 39 - 105, establish specific Airworthiness Directives (ADs) for certain aircraft models, including the DH114 (Heron) Series Aeroplanes, as detailed in AD/DH114/48. This directive concerns the aileron mass balance weight assembly and applies to all models of the DH114 series. The primary requirement, as outlined in the directive, is to either follow the action specified in British Aerospace Technical Notice W19 Issue 1 or to inspect the assembly in accordance with a scheme approved by the Secretary (sections 1 and 2). This action must be completed unless it has already been performed. It must be done in line with the Requirement Document and no later than 31 August 1987. Furthermore, if the action has not been completed by the specified date, it must be carried out at the next inspection for Maintenance Release issue after 30 June 1987 but no later than 31 August 1987. The obligations imposed by this directive are clear and stringent. Operators of DH114 series aeroplanes must ensure that the aileron mass balance weight assembly is either addressed according to the British Aerospace Technical Notice W19 Issue 1 or inspected under an approved scheme. This directive underscores the necessity of timely compliance to mitigate risks such as severe internal corrosion, which could lead to aileron flutter or serious handling issues. The regulations demand that these inspections or actions are performed by specific deadlines to ensure the continued airworthiness and safety of the aircraft. Failure to comply with the requirements set out in AD/DH114/48 could result in serious consequences. Although specific penalties are not detailed within the directive itself, non-compliance with Civil Aviation Regulations can lead to enforcement actions by the Civil Aviation Safety Authority (CASA). Such actions might include fines, suspension or revocation of airworthiness certificates, and potential criminal charges if the non-compliance results in accidents or endangers safety. The severity of these consequences highlights the importance of adhering to the mandated inspection and maintenance schedules to uphold the safety standards required by Australian aviation law.