AD/AL 250/27 - Compressor Bleed Valve Strainer - Installation

Overview

The Civil Aviation Regulations 1998, specifically Part 39, were enacted to address the need for stringent airworthiness standards to ensure the safety and reliability of aircraft operations within Australian airspace. This legislative instrument was introduced by the Australian Parliament to establish a comprehensive regulatory framework governing civil aviation safety. One particular area of focus is the issuance of Airworthiness Directives, such as AD/AL 250/27 concerning Allison Turbine Engines - 250 Series. This directive mandates the installation of a compressor bleed valve strainer for specific models of Allison engines, aiming to enhance the operational safety and reliability of these engines in commercial aviation. The policy objective is to maintain high safety standards and reduce the risk of engine failure or other related incidents, thereby protecting the interests of passengers, crew, and the public.

Scope and Application

The Civil Aviation Regulations 1998, as amended, mandate that the Airworthiness Directives apply to all operators of aircraft engines within the specified model range, namely the Allison Turbine Engines 250 Series, including models 250-C20, -C20B, -B17 and B17B. These directives are integral to ensuring compliance with safety standards for these engines and are mandated by the Civil Aviation Safety Authority (CASA) under the authority of the Commonwealth of Australia. The regulations require compliance within 100 hours of time in service following the issuance date of 31 July 1977. These directives are applicable to any aircraft operators or maintenance personnel working on these engines, ensuring that the specified maintenance and operational standards are met to maintain airworthiness. The regulations cover a broad spectrum of operations and transactions within the aviation industry, targeting specific components and installation procedures to mitigate potential safety risks. The geographical reach of these regulations is nationwide, applying uniformly across all states and territories within Australia, thereby ensuring a consistent safety standard is maintained throughout the country. The regulations are comprehensive and do not include any explicit exclusions or exemptions, mandating that all specified engine models adhere to the outlined directives without exception.

Key Provisions

The main operative sections of the Civil Aviation Regulations 1998, Part 39, concerning Allison Turbine Engines - 250 Series, are outlined in AD/AL 250/27. This Airworthiness Directive (AD) pertains specifically to the installation of a compressor bleed valve strainer in models 250-C20, -C20B, -B17, and B17B. Compliance with these directives is mandatory, with specific timelines and documentation requirements as indicated. The directive mandates the installation of the bleed valve strainer within 100 hours of the aircraft's time in service after 31 July 1977. The relevant documentation includes Allison CEB 250-C20/C20B-1116, Allison CEB 250-B17/B17B TP CEB 1071, or FAA AD No. 77-09-08. The obligations imposed by these regulations are clear and require adherence to the specified timeline and documentation. Aircraft operators must ensure that the compressor bleed valve strainer is installed within the stipulated timeframe. This involves verifying the aircraft's service hours post-July 1977 and ensuring the installation is carried out in accordance with one of the referenced documents. Proper record-keeping is also required, as the documentation serves as proof of compliance. Failure to meet these obligations could result in the aircraft being deemed non-airworthy, potentially leading to grounding and legal repercussions. Any breaches of the requirements set out in these regulations can lead to significant consequences. While the specific penalties are not detailed in the text provided, under the Civil Aviation Act 1988 and associated regulations, non-compliance with airworthiness directives can result in both civil and criminal penalties. Civil penalties can include fines and potential revocation of operating certificates. Criminal penalties may include imprisonment, reflecting the serious nature of ensuring aviation safety. The exact penalties would depend on the severity of the breach and the discretion of the court, but the implications for non-compliance are severe.