AD/AL 250/48 Amdt 3 - Fourth Stage Turbine Nozzle P/N 6898694 - Inspection

Overview

The Civil Aviation Regulations 1998, specifically under Part 39 - 106 Civil Aviation Safety Authority Schedule of Airworthiness Directives, addresses the maintenance and safety of aviation components by issuing directives for various aircraft engines. One such directive is AD/AL 250/48 Amendment 3, which pertains to the Allison Turbine Engines - 250 Series, particularly the Fourth Stage Turbine Nozzle P/N 6898694. This directive was enacted to ensure that all applicable Allison 250-C30, C30P, and C30S engines and turbine assemblies meet specific safety standards, following the receipt of FAA Airworthiness Directive No. 81-13-12. The objective of this amendment is to incorporate changes outlined in Revision 3 of CEB-A-72-3056, which includes broader model applicability, additional inspection requirements, and new parts life limitations, thereby enhancing the safety and reliability of these engines. This legislative instrument was issued by the Civil Aviation Safety Authority under the authority granted by the Civil Aviation Act 1988.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, pertains to the Civil Aviation Safety Authority’s Schedule of Airworthiness Directives, which governs the maintenance and operational standards for aviation components. One such directive, AD/AL 250/48 Amendment 3, focuses on the inspection of the Fourth Stage Turbine Nozzle P/N 6898694 for Allison 250-C30, C30P, and C30S engines and turbine assemblies. This directive applies to all instances where these particular engine models and their assemblies are in use, and compliance is mandated upon receipt of the directive in accordance with the specified requirement document, Allison 250-C30, C30P, C30S: CEB-A-72-3056, Revision 3. It is important to note that while adherence to this directive is required, it does not fully address the corresponding FAA Airworthiness Directive No. 81-13-12, as this Australian directive incorporates changes from Revision 3 of CEB-A-72, expanding model affectivity, additional inspections, and parts life limitations. The regulation extends its application nationally, ensuring that all operators and maintainers within Australia comply with these safety standards. The directive's jurisdictional reach is national, applying to all operators and entities involved with the maintenance and operation of the specified Allison engines across Australia. No exclusions or exemptions are explicitly stated within the directive itself, implying that all relevant parties must adhere to the outlined inspection requirements. The directive does not explicitly mention the use of subordinate instruments to extend or restrict its application, suggesting that the primary document itself is the definitive source for compliance standards.

Key Provisions

The Civil Aviation Regulations 1998, Part 39 - 106, specifically under the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, includes a provision concerning the Allison Turbine Engines - 250 Series (AD/AL 250/48 Amdt 3). This section pertains to the inspection of the Fourth Stage Turbine Nozzle (P/N 6898694) (section 1). The applicability of this directive covers Allison 250-C30, C30P, and C30S engines and turbine assemblies as outlined in the requirement document (section 2). The relevant document is Allison 250-C30, C30P, C30S: CEB-A-72-3056, Rev. 3. It is important to note that compliance with FAA Airworthiness Directive No. 81-13-12 in part only does not equate to full compliance with Amendment 3 of this Directive (section 3). The obligations imposed by this Act require the inspection of the specified turbine nozzle components in the designated engine models. Operators and maintenance personnel must ensure compliance with the requirement document upon receiving this Directive (section 4). The directive mandates that inspections must be conducted in accordance with the detailed instructions provided in CEB-A-72-3056, Rev. 3, which includes wider model affectivity, additional inspections, and parts life limitations (section 5). The directive aims to enhance safety by ensuring that the turbine nozzle components are examined and maintained to the specified standards. Failure to comply with the provisions of this Directive may result in significant consequences. The Act does not explicitly state specific offences, penalties, or civil/criminal consequences for non-compliance in the provided text. However, non-compliance with CASA directives generally can lead to serious repercussions, including enforcement actions, fines, and potential grounding of aircraft. The exact penalties can vary depending on the severity and frequency of non-compliance, but they can include significant financial penalties and operational restrictions for the non-compliant party.