AD/LTS/14 - Power Turbine Rotor

Overview

The Civil Aviation Regulations 1998, enacted by the Commonwealth of Australia, were amended through the legislative instrument F2006B11177 to address safety concerns related to the LTS101 series engines, excluding the LTS101-750B-2 model. This regulation was introduced to mitigate the risk of power turbine rotor failure that could lead to loss of engine power, ensuring the safety of civil aviation operations. The amendment reflects the policy objective to enhance aviation safety by addressing workmanship deficiencies identified by the manufacturer, Textron Lycoming, in certain power turbine discs. Compliance with this directive is mandatory, with an effective date set for 12 September 1996, as specified in the requirement document. This legislative instrument was enacted by the Parliament of Australia to establish specific airworthiness directives under the Civil Aviation Act 1988, aiming to maintain the highest standards of aircraft safety. The requirement to remove certain power turbine rotor assemblies from service is based on identified deficiencies that could potentially compromise the structural integrity and operational safety of the engines. The directive mandates the identification and removal of specified rotor assemblies as listed in Textron Lycoming Service Bulletin Number LT 101-72-50-0144, in alignment with the Federal Aviation Administration's Airworthiness Directive 96-12-05.

Scope and Application

The Civil Aviation Regulations 1998, under Part 39 - 106, specifically addresses the safety directives concerning AlliedSignal (Lycoming) Turbine Engines, with a focus on the LTS 101 series engines excluding the LTS101-750B-2 model. This legislation applies to all relevant engines and mandates the identification and removal from service of specific power turbine rotor assemblies to prevent failures that could result in the loss of engine power. The directive outlines the need to check the serial number of installed power turbine rotor assemblies and remove those listed by serial number in Textron Lycoming Service Bulletin Number LT 101-72-50-0144, as detailed in FAA Airworthiness Directive 96-12-05. Compliance with these directives is required as stipulated in the regulation, effective from 12 September 1996. This legislative measure underscores the commitment to aviation safety by addressing potential manufacturing defects that could compromise the integrity and performance of turbine engines.

Key Provisions

The Civil Aviation Regulations 1998, specifically Part 39 - 106, includes the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives for the AlliedSignal (Lycoming) Turbine Engines - LTS 101 Series. This directive, AD/LTS/14, pertains to the power turbine rotor (10/96) and applies to all LTS101 series engines except the LTS101-750B-2 model. The directive mandates the identification of the serial number of the power turbine rotor assembly installed in applicable engines to prevent power turbine rotor failure, which could result in a loss of engine power. It requires the removal from service of rotor assemblies listed by serial number in Textron Lycoming Service Bulletin Number LT 101-72-50-0144. This action is to be taken in accordance with the requirement document, which has an effective date of 12 September 1996, and also references FAA Airworthiness Directive 96-12-05. Entities and parties governed by this directive must ensure compliance by identifying the serial numbers of the power turbine rotor assemblies in use and removing from service any assemblies that are listed by serial number in the specified Textron Lycoming Service Bulletin. This involves detailed record-keeping and adherence to the compliance guidelines outlined in the requirement document. The directive emphasises the importance of following manufacturer advice, as it reflects identified workmanship deficiencies in certain power turbine discs that could reduce the fatigue life of these components, potentially leading to catastrophic failure. The consequences of non-compliance with AD/LTS/14 are significant. Failure to adhere to the directive can result in serious safety issues, including the risk of engine power loss during flight, which could endanger lives and property. The regulatory framework imposes strict obligations on operators and maintenance providers to ensure that they identify and remove the specified rotor assemblies from service. The directive underscores the importance of maintaining aircraft safety standards through adherence to airworthiness directives issued by CASA. Non-compliance can result in severe penalties, including fines and potential criminal charges, reflecting the critical nature of these safety requirements. Under the Civil Aviation Regulations 1998, penalties for non-compliance with airworthiness directives are stringent. The regulations provide for both civil and criminal penalties. Civil penalties can include fines up to a maximum of $50,000 for individuals and $250,000 for corporations, reflecting the seriousness of non-compliance. Criminal penalties can also be imposed, which may include imprisonment, highlighting the high stakes involved in ensuring adherence to these safety directives. The rigorous enforcement of these provisions is designed to uphold the highest standards of aviation safety.