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The effectiveness of Engine Life Usage Monitoring and PartsManagement systems is largely determined by the aircraft-specificrequirements. This document addresses the following areas: safety,life-limiting criteria, life usage algorithm development, dataacquisition and management, parts life tracking, design feedback,and cost effectiveness.It primarily examines the requirements and techniques currentlyin use, and considers the potential impact of new technolog to thefollowing areas: parts classification and control requirements,failure causes of life-limited parts, engine life prediction andusage measurement techniques, method validation, parts life usagedata management, lessons learned, and life usage trackingbenefits.SAE ARP1587 provides general guidance on the designconsideration and objectives of monitoring systems for aircraft gasturbine engines. A major function of these Engine MonitoringSystems is to monitor the usage of life-limited parts in order tomaximize available life and to enhance aircraft safety.The purpose of this document is to review the current approachesto Engine Life Usage Monitoring and Parts Management. The documentalso serves to provide a summary of the many varied requirements ofaircraft turbine engine life usage monitoring and parts managementand a description of the means by which these requirements can beachieved more effectively through the use of engine monitoringsystems.This document is being cancelled because there has been no progress since 2003 and the committee has no one to lead a WG to update it. Engine OEMs and Certification Authorities are concerned it could be used to develop a new system against that would no longer meet current standards.
This Aerospace Information Report (AIR) describes a Limited Engine Monitoring System that can be used by the flight crew or the maintenance staff, or both, to monitor the health of gas turbine engines in aircraft. This AIR considers monitoring of gas path performance and mechanical parameters, and systems such as low cycle fatigue counters and engine history recorders. It also considers typical measurement system accuracies and their impact. This AIR is intended as a technical guide. It is not intended to be used as a legal document or standard. AIR 1873 supplements ARP 1587, Aircraft Gas Turbine Engine Monitoring System Guide.The Aerospace Information Report (AIR) has been superseded by a completely new document, ARP5120, which provides guidance on how to develop and implement an integrated end-to-end health management system for gas turbine engine applications. The original AIR1873A information was updated and transformed into ARP5120. SAE ARP5120 consolidates SAE AIR1873, 4061B, 4175A, and 5120 into one document per the direction of the SAE E32 committee.
This SAE Aerospace Information Report (AIR) provides an overview of temperature measurement for engine monitoring systems in various areas of aircraft gas turbine engines while focusing on current usage and methods, systems, selection criteria, and types of hardware. This document emphasizes temperature monitoring for diagnostics and condition monitoring purposes. AIR1900A has been reaffirmed to comply with the SAE five-year review policy.
A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
En gennemgang af vedligeholdelsen af luftfartøjer og kravene hertil. Egnet som lærebog.
The main reason for usage monitoring is to ensure that gas-turbine engine components do not fail in service. Early maintenance policies were based on a "hard-time" philosophy, measured in hours of use. More recently, technical advances have permitted a trend towards a condition-based philosophy. Life monitoring systems have evolved to automate measurement of the life used in modern engines. In many cases, the new assessment and monitoring methods have been applied to ageing fleets with great success. This document describes the design and operational factors that should be considered prior to the application of these techniques to an aged engine fleet. Turbine disks are the most safety critical parts, due to the amount of energy released should they fail. Moreover, future improvements in engine performance directly depend on increases in component stress levels. These demands for better performance must be met within the regulatory requirements for safety standards. This situation presents one of the most challenging areas of gas turbine design. Satisfying these conflicting demands carries a cost that reaches far beyond the development and purchase costs of a particular engine design. Although turbine disks are particularly expensive to make, over 90% of them are thrown away when less than 50% of their life has been consumed. Physical use, component life and safety have to be managed on a statistical basis because of variations in material properties.
This SAE Aerospace Information Report (AIR) provides information and guidance for the selection and use of technologies and methods for lubrication system monitoring of gas turbine aircraft engines. This AIR describes technologies and methods covering oil system performance monitoring, oil debris monitoring, and oil condition monitoring. Both on-aircraft and off-aircraft applications are presented. A higher-level view of lubrication system monitoring as part of an overall engine monitoring system (EMS), is discussed in ARP1587.The scope of this document is limited to those lubrication system monitoring, inspection and analysis methods and devices that can be considered appropriate for health monitoring and routine maintenance.This AIR is intended to be used as a technical guide. It is not intended to be used as a legal document or standard. This SAE Aerospace Information Report (AIR) was developed to provide information and guidance for the selection and use of technologies and methods for lubrication system monitoring of gas turbine aircraft engines. Benefits of effective engine lubrication system monitoring include increased reliability, reduced cost of ownership, improved product assurance, and enhanced safety of the equipment. The guidance within this report will support developers, operators, and maintainers to improve the effectiveness of lubrication system monitoring in existing and future applications. This edition updates content, formatting, and incorporates new content on oil quality monitoring and off-aircraft oil debris monitoring.