AD/HS 125/125 - APU Power Supplies

Overview

The Civil Aviation Regulations 1998, administered by the Civil Aviation Safety Authority, were enacted to ensure the safety and regulation of civil aviation in Australia. One of the key components of these regulations is Part 39, which includes various airworthiness directives, one of which is AD/HS 125/125 concerning the British Aerospace BAe 125 Series Aeroplanes. This particular directive was introduced to address safety issues associated with the APU (Auxiliary Power Unit) power supplies of the BAe 125 Series, aiming to mitigate risks of damage from engine debris by relocating the power supply connections. This directive is a direct implementation of a requirement from the UK Civil Aviation Authority, reflecting a commitment to international safety standards and the protection of passengers and crew. The policy objective of this directive is to ensure that the APU power supplies of the BAe 125 Series aeroplanes are adequately protected, thereby reducing the risk of accidents or operational failures. Compliance with this directive is mandatory, with the specified action required to be completed prior to 30 March 1992, ensuring that all aircraft meet the necessary safety standards in alignment with the BAe Service Bulletin 49-37-25A253A&B. The directive underscores the importance of continuous safety improvements and adherence to stringent regulatory standards in the aviation industry.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertain to the Airworthiness Directives for British Aerospace BAe 125 Series Aeroplanes, with a focus on APU power supplies as detailed in AD/HS 125/125. This regulation applies to all entities and persons involved in the operation of the specified BAe 125 aeroplanes, ensuring adherence to safety measures outlined in BAe Service Bulletin 49-37-25A253A&B. The directive mandates compliance with the UK Civil Aviation Authority's requirements, which were classified as mandatory prior to 30 March 1992, aimed at relocating APU power supply connections to mitigate potential damage from engine debris. This legislative instrument operates under the Commonwealth of Australia and extends its reach across all states and territories within Australia, ensuring uniformity in civil aviation safety standards. Any exclusions, exemptions, or thresholds are determined by the specifics of the requirement document and do not alter the overarching mandate for compliance with the designated safety bulletin.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 105, detail the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives for British Aerospace BAe 125 Series Aeroplanes, including the APU (Auxiliary Power Unit) power supplies directive (AD/HS 125/125). The directive, dated 3 March 1992, is applicable as specified in the requirement document and mandates action in accordance with BAe Service Bulletin 49-37-25A253A&B. This action is classified as mandatory by the UK Civil Aviation Authority (CAA). The directive requires the relocation of APU power supply connections to safeguard against damage from engine debris, and compliance must be achieved prior to 30 March 1992. The obligations imposed by this directive are significant, as they require operators of British Aerospace BAe 125 Series Aeroplanes to adhere strictly to the specified action in BAe Service Bulletin 49-37-25A253A&B. This involves physically relocating the APU power supply connections to prevent potential damage from engine debris, ensuring the integrity and safety of the aircraft’s APU system. The directive underscores the importance of following detailed technical instructions to maintain airworthiness standards, reflecting a commitment to safety by both CASA and the UK CAA. Non-compliance with the provisions of this directive can lead to severe consequences. While specific penalties are not detailed within the text, breaches of airworthiness directives under the Civil Aviation Regulations 1998 generally attract significant penalties, including fines and potential grounding of the aircraft. The seriousness of these consequences reflects the critical nature of adhering to airworthiness directives designed to protect against potential hazards that could compromise flight safety. In summary, the directive mandates that operators of British Aerospace BAe 125 Series Aeroplanes must ensure the APU power supply connections are relocated to prevent damage from engine debris, in compliance with BAe Service Bulletin 49-37-25A253A&B. Failure to comply with this directive could result in severe penalties, reinforcing the imperative to maintain stringent safety standards in aviation operations.