AD/T53/11 - Replacement Of Compressor Rotor Discs and Impeller Assembly

Overview

The Civil Aviation Regulations 1998, specifically within Part 39, address the maintenance and operational safety of civil aviation in Australia. One notable addition to this legislation is the Airworthiness Directive AD/T53/11, which was enacted to ensure the safety and reliability of AlliedSignal (Lycoming) Turbine Engines - T53 Series. This legislative instrument was introduced to address issues related to the compressor rotor discs and impeller assembly of these engine models. The directive aims to prevent potential failures that could lead to catastrophic outcomes during flight operations. Enacted by the Commonwealth of Australia, the policy objective of this directive is to ensure that all applicable engine models comply with the specified safety standards, as outlined in documents such as Lycoming SB No. 0033, FAA AD 74-09-03, or AD/LYC-T/12, thereby maintaining the integrity and safety of Australian civil aviation.

Scope and Application

The Civil Aviation Safety Authority (CASA) under the Civil Aviation Regulations 1998, specifically in Part 39 - 106, mandates compliance with Airworthiness Directives (AD) concerning specific aircraft components, including the AlliedSignal (Lycoming) Turbine Engines - T53 Series. This directive, AD/T53/11, applies to all models of T5309C, T5311A, and T5311B engines. The requirement to replace the compressor rotor discs and impeller assembly is outlined in Lycoming Service Bulletin No. 0033, Federal Aviation Administration (FAA) AD 74-09-03, or AD/LYC-T/12, with compliance necessary before 28 June 1974. This regulation enforces strict adherence to the specified modifications to ensure the continued airworthiness of the affected engines, thereby maintaining safety standards within the aviation industry. The directive encompasses all entities and individuals operating or maintaining these engines within the Australian Commonwealth, ensuring that all aircraft utilising these turbine engines comply with the stipulated safety measures.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 106, mandate compliance with the Civil Aviation Safety Authority (CASA) Schedule of Airworthiness Directives (AD). Section 1/86 pertains to the AlliedSignal (Lycoming) Turbine Engines - T53 Series. The key requirement here is the replacement of compressor rotor discs and the impeller assembly for all models T5309C, T5311A, and T5311B engines. Compliance with this directive can be evidenced by referencing either Lycoming Service Bulletin No. 0033, the Federal Aviation Administration (FAA) AD 74-09-03, or AD/LYC-T/12. This directive applies to engines that were in compliance before 28 June 1974. Entities governed by this Act must ensure that the specified components of the T53 series turbine engines are replaced in accordance with the referenced documentation. This involves adhering to the procedures outlined in Lycoming Service Bulletin No. 0033, FAA AD 74-09-03, or AD/LYC-T/12. Failure to replace these components as mandated could lead to non-compliance with the Civil Aviation Regulations 1998, thereby impacting the airworthiness of the aircraft. Failure to comply with these airworthiness directives can result in severe consequences. Under the Civil Aviation Regulations 1998, non-compliance may lead to civil or criminal penalties. The severity of the penalty depends on the nature and extent of the breach. Civil penalties can include substantial fines, while criminal penalties may involve imprisonment. The exact penalties are not specified in the provided text but typically align with the seriousness of the non-compliance and any resultant risks to aviation safety.