AD/AL 250/5 Amdt 1 - Engine Compressor - Modifications

Overview

The Civil Aviation Regulations 1998 were enacted by the Parliament of Australia to establish a comprehensive regulatory framework for civil aviation, ensuring the safety and efficiency of air travel within the country. One specific aspect of these regulations is the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives, which includes AD/AL 250/5 Amendment 1 concerning Allison Turbine Engines - 250 Series. This amendment was introduced to address safety issues related to engine compressor modifications, specifically for all 250-C18 engines, as outlined in Allison CEBs No. 250 CEB-51 and -52. The directive mandates compliance before 25 October 1968, reflecting the policy objective of maintaining high safety standards in civil aviation by ensuring that all aircraft engines meet specific airworthiness criteria. This legislative instrument is an essential component of the overarching regulatory framework, aimed at preventing potential safety hazards and ensuring the continued reliability of aircraft operations within Australia.

Scope and Application

The Civil Aviation Regulations 1998, specifically Part 39 - 106, under the Civil Aviation Safety Authority Schedule of Airworthiness Directives, pertains to the Allison Turbine Engines - 250 Series, as outlined in AD/AL 250/5 Amendment 1, which addresses engine compressor modifications. This legislation applies to all 250-C18 engines, requiring compliance with the directives set forth in Allison CEBs No. 250 CEB-51 and -52, with an effective compliance date before 25 October 1968. The regulation is applicable across the Commonwealth of Australia, thus extending its reach to all entities operating within the Australian aviation industry that possess or utilise the specified engine models. The directive does not explicitly mention any exclusions, exemptions, or thresholds, implying that all affected engines must comply with the outlined modifications. The application and enforcement of these directives may be further detailed or extended through subordinate instruments issued by the Civil Aviation Safety Authority.

Key Provisions

The Civil Aviation Regulations 1998, particularly under PART 39 - 106, outline specific safety directives for the Allison Turbine Engines - 250 Series. Section 39-106 (AD/AL 250/5 Amendment 1) addresses modifications to the engine compressor for all 250-C18 engines, referencing Allison CEBs No. 250 CEB-51 and -52. Compliance with these directives is mandatory and must be achieved before 25 October 1968. These directives ensure that the engines meet the necessary safety standards to maintain airworthiness. The obligations imposed by these regulations are quite specific. All operators of 250-C18 engines must adhere to the modifications outlined in the referenced Allison CEBs. This involves making sure that the compressor components are updated to meet the specified safety standards. Failure to comply with these directives can result in the engine being deemed non-airworthy, which could lead to grounding of the aircraft and subsequent operational disruptions. Failure to comply with the provisions of these directives can result in significant consequences. The Civil Aviation Safety Authority (CASA) may impose administrative penalties, including fines and legal action. Additionally, operators may face operational restrictions, such as being prohibited from flying until the engine modifications are verified as compliant. These penalties are in place to ensure that all aircraft maintain the highest standards of safety and airworthiness.