AD/JETSTREAM/47 - Fuel Water-Drain-Valve Body Assembly

Overview

The Civil Aviation Regulations 1998, which were enacted to establish a comprehensive framework for civil aviation safety in Australia, include specific directives to address various safety concerns. Part 39 - 105, concerning the Civil Aviation Safety Authority's schedule of airworthiness directives, is particularly pertinent for ensuring that aircraft meet safety standards. One such directive, AD/JETSTREAM/47, was introduced to address the specific issue of the fuel water-drain-valve body assembly in British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. This directive was enacted to mitigate the risk of the valve body loosening and detaching, which could lead to a loss of fuel. The directive applies to specific models and construction numbers of Jetstream aircraft and requires compliance with the Technical Requirements of British Aerospace SB 28-JM 5354, which has been classified as mandatory by the UK Civil Aviation Authority. The objective is to ensure the aircraft’s continued airworthiness and safety through timely corrective actions. The directive was issued by the Civil Aviation Safety Authority, under the authority vested in it by the Civil Aviation Act 1988, to enforce compliance with airworthiness standards. The policy objective is to prevent potential safety hazards by mandating specific maintenance actions to be undertaken within defined timeframes. The requirement to comply with the directive underscores the importance of adhering to internationally recognised safety standards to protect both the aircraft's operational integrity and the safety of those onboard.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 105, pertains to airworthiness directives issued by the Civil Aviation Safety Authority (CASA) and includes a schedule detailing directives for various aircraft. One such directive, AD/JETSTREAM/47, applies to specific models of British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. This directive mandates corrective action concerning the fuel water-drain-valve body assembly for particular aircraft constructor numbers. The directive applies to all HP137 Mk 1 and Jetstream series 200 with modification 5269, Jetstream series 3100 with modifications JM5269 or JM 7552, and Jetstream series 3200 aircraft with constructor numbers ranging from 790 to 900. The directive requires compliance with the technical requirements outlined in British Aerospace Service Bulletin SB 28-JM 5354, which has been classified as mandatory by the UK Civil Aviation Authority (CAA). Compliance deadlines are set, with Part A of the requirement document needing to be completed by 31 August 1991, and Part B by 31 December 1991. This directive ensures the safety of these aircraft by addressing a critical issue of potential fuel loss due to the loosening and detachment of the valve body.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, PART 39 - 105, pertain specifically to the British Aerospace BAe 3100 (Jetstream) Series Aeroplanes. Under section AD/JETSTREAM/47, it is mandated that certain Jetstream aircraft models must address an issue with the fuel water-drain-valve body assembly. This directive applies to all HP137 Mk 1 and Jetstream series 200 with modification 5269 incorporated, Jetstream series 3100 with modification JM5269 or JM 7552 incorporated, and Jetstream series 3200 aircraft constructors numbers in the range 790 to 900. The requirement is that these aircraft must take action in accordance with the Technical Requirements of British Aerospace SB 28-JM 5354, which has been classified as mandatory by the UK Civil Aviation Authority (CAA). This action must be completed unless it has already been undertaken. The obligations and requirements imposed by this Act necessitate that the specified Jetstream aircraft models undergo a specific maintenance procedure to ensure the fuel water-drain-valve body assembly is properly secured. According to the Requirement Document, Part A of the action must be completed by 31 August 1991, and Part B by 31 December 1991. The directive underscores the importance of adhering to the manufacturer's recommendations, which were deemed necessary due to the potential risk of the valve body loosening and detaching, leading to a loss of fuel. Failure to comply with the directives outlined in the Civil Aviation Regulations 1998 could result in severe consequences. Although specific penalties are not detailed in the excerpt, non-compliance with mandatory airworthiness directives typically results in serious repercussions, including potential grounding of the aircraft, fines, or other enforcement actions taken by the Civil Aviation Safety Authority (CASA). The overarching goal of these provisions is to ensure the safety and airworthiness of the aircraft, thereby protecting passengers, crew, and the general public from the hazards associated with potential fuel leaks.