Engine Condition Monitoring (ECM) typically involves collecting and storing a number of parameters from an aircraft engine and later analyzing the data to ensure there is no anomalous activity. Such activity might indicate an impending failure or suggest a component is damaged. Since normal engine operating parameters can be established for typical flight envelopes in advance, it is possible to flag “exceedance events” such as turbine over-speed or a turbine hot start. Such events might stress engine components beyond the normal operating parameters, possibly requiring further actions such as changing maintenance schedules. Engine Monitoring Units (EMUs) normally consist of a data acquisition and a storage component integrated into a compact and rugged unit. Data can be retrieved on a periodic basis and analyzed using software tools. The EMU hardware is sometimes designed so as to collect more data when pre-defined limits are exceeded. In general, more data is desired during atypical events, as these events deviate from known operations. Such variable data collection rates balance data requirements and storage limitations. Curtiss-Wright’s multi-role recorders can provide a rugged solution for monitoring engine usage and recording data. 

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