AD/BAe 146/74 - Powerplant Firewire Responder Units

Overview

The Civil Aviation Regulations 1998, specifically Part 39 - 105, address the need to ensure the safety and airworthiness of aircraft operating within Australia. This regulatory framework was enacted to safeguard the public and maintain the integrity of the aviation industry by setting stringent standards for aircraft maintenance and operations. The Civil Aviation Regulations are administered by the Civil Aviation Safety Authority (CASA), with the overarching policy objective of ensuring that aircraft are maintained in a safe and airworthy condition throughout their operational life. One particular instance of these regulations is the Airworthiness Directive AD/BAe 146/74 concerning the British Aerospace BAe 146 Series Aeroplanes. This directive was introduced in response to reported incidences of damage to the fuel feed pipe caused by the movement of the firewire responder unit(s), which required mandatory inspections to prevent potential hazards. This directive became effective on 17 March 1999, mandating that inspections be performed prior to 1 April 1999 and at each subsequent 'C' check until a specific service bulletin was incorporated.

Scope and Application

The Civil Aviation Regulations 1998, as detailed in the schedule of Airworthiness Directives, mandates specific safety procedures for British Aerospace BAe 146 Series aeroplanes, specifically those of the 100, 200, and 300 series, as well as the Avro 146-RJ70, 85, and 100 series, excluding those that have incorporated modification HCM01638A or British Aerospace Regional Aircraft BAe 146 Service Bulletin (SB) 26-44-01638A. This directive is issued to ensure the safety of the aircraft by addressing the issue of potential chafing on the fuel pipe part number 2-193-940-02, caused by the movement of the engine firewire responder unit(s). The directive, effective from 17 March 1999, necessitates an inspection of the specified fuel pipe for chafing damage before 1 April 1999 and at each subsequent aircraft 'C' check until the aforementioned service bulletin is incorporated. This requirement underscores the importance of maintaining stringent safety standards in civil aviation operations within Australia, aligning with classifications and directives issued by the UK's Civil Aviation Authority.

Key Provisions

The key provisions of the Civil Aviation Regulations 1998, specifically AD/BAe 146/74, relate to the inspection and maintenance of the fuel pipe of British Aerospace BAe 146 Series aeroplanes. According to section (1), all BAe 146 100, 200, 300 Series aeroplanes and all Avro 146-RJ70, 85, 100 Series aeroplanes, without specific modifications, are required to undergo inspections of the fuel pipe Part Number (P/N) 2-193-940-02. This inspection must be carried out to detect any chafing caused by the engine firewire responder unit(s), in line with the British Aerospace Regional Aircraft BAe 146 Service Bulletin (SB) 26-44 dated 25 February 1999. The inspections are mandated to be conducted before 1 April 1999 and at each subsequent 'C' check until the modification BAe 146 SB.26-44-01638A is incorporated. The obligations imposed by this Act on the parties or entities it governs include a rigorous inspection regime for the specified aeroplanes. Operators must ensure that inspections of the fuel pipe are performed according to the guidelines set out in the Service Bulletin, which has been classified as mandatory by the Civil Aviation Authority (UK). This requirement is aimed at preventing potential damage to the fuel feed pipe, which could occur due to movement of the firewire responder unit(s), leading to contact between the responder connector backshell clamp and the adjacent fuel pipe. The directive underscores the importance of these inspections to maintain airworthiness and safety standards. Failure to comply with the obligations stipulated in AD/BAe 146/74 could result in serious consequences. While the specific penalties or consequences for non-compliance are not detailed in the text, the nature of airworthiness directives typically entails strict enforcement and potential regulatory action. Non-compliance with airworthiness directives can lead to the grounding of aircraft, fines, and other enforcement actions by the Civil Aviation Safety Authority. The severity of these penalties reflects the critical importance of adhering to safety regulations to prevent potential hazards that could compromise flight safety.