AD/LTS/15 - Gas Generator Rotor

Overview

The Civil Aviation Regulations 1998, which include PART 39 - 106, were enacted to ensure the safety and regulation of civil aviation in Australia. This legislative instrument specifically addresses the need to maintain airworthiness of aircraft, particularly focusing on the safety of turbine engines such as those produced by AlliedSignal (Lycoming). The problem it addresses is the potential for a total loss of engine power, in-flight shutdowns, and possible damage to aircraft due to manufacturing discrepancies in gas producer rotor discs. The Australian Government, through the Civil Aviation Safety Authority, established this directive to mandate the removal of specific rotor discs to prevent such safety risks, aligning with international standards such as those set by the Federal Aviation Administration in the United States. The policy objective is to maintain the highest standards of aviation safety and reliability by addressing known manufacturing issues promptly.

Scope and Application

The Civil Aviation Regulations 1998, specifically PART 39 - 106, pertains to the safety and airworthiness directives governing the AlliedSignal (Lycoming) Turbine Engines - LTS 101 Series. This legislation applies to all LTS101 series engines, targeting the gas generator rotor to prevent a total loss of engine power, in-flight engine shutdown, and potential aircraft damage. The regulation mandates the identification of the serial numbers of gas producer rotor discs installed in these engines and the subsequent removal from service of those discs identified in Textron Lycoming Service Bulletin Number LT 101-72-50-0150. The directive references FAA Airworthiness Directive 96-12-27 and requires compliance as detailed in the requirement document, with an effective date of 12 September 1996. This regulatory measure underscores the necessity to address potential manufacturing defects to ensure the safety and operational integrity of the aircraft engines.

Key Provisions

The main operative section of this legislative instrument is section 106 of the Civil Aviation Regulations 1998, which establishes the Civil Aviation Safety Authority's (CASA) Schedule of Airworthiness Directives. Specifically, AD/LTS/15 pertains to the AlliedSignal (Lycoming) Turbine Engines - LTS 101 Series and mandates the identification and removal of specific gas generator rotor discs to prevent potential engine failure and associated risks (Civil Aviation Regulations 1998, Part 39 - 106). The requirement is explicitly stated: to mitigate the risk of total loss of engine power, in-flight shutdown, and possible damage to the aircraft, the serial numbers of the gas producer rotor discs must be identified and those specified in Textron Lycoming Service Bulletin Number LT 101-72-50-0150 must be removed from service (AD/LTS/15). Compliance with this directive must be achieved by the effective date of 12 September 1996, as outlined in the requirement document. The obligations imposed by this directive are clear and specific. Aircraft operators and owners must identify the serial numbers of the gas producer rotor discs installed in their LTS 101 series engines. For discs listed in the specified service bulletin, operators must remove these from service to comply with the directive. This involves following the detailed instructions provided by the manufacturer in Textron Lycoming Service Bulletin Number LT 101-72-50-0150. The directive references a Federal Aviation Administration (FAA) Airworthiness Directive 96-12-27, suggesting that CASA is aligning with international safety standards to ensure the safety and airworthiness of the engines in question. Breaching the requirements set out in AD/LTS/15 could lead to significant consequences. Failure to identify the serial numbers of the gas producer rotor discs and remove those specified could result in severe safety risks, including total loss of engine power and in-flight shutdown, which could endanger the aircraft and its occupants. Although the Civil Aviation Regulations 1998 do not explicitly state penalties for non-compliance with airworthiness directives, non-compliance could lead to enforcement actions by CASA. These actions might include grounding the aircraft until compliance is achieved, fines, and other regulatory penalties. The potential for severe operational disruptions and safety hazards underscores the importance of adhering to these directives.