The purpose of this SAE Aerospace Information Report (AIR) is to present a quantitative approach for evaluating the performance and capabilities of an Engine Monitoring System (EMS). The value of such a methodology is in providing a systematic means to accomplish the following: 1 Determine the impact of an EMS on key engine supportability indices such as Fault Detection Rate, Fault Isolation Rate, Mean Time to Diagnose, In-flight Shutdowns (IFSD), Mission Aborts, and Unscheduled Engine Removals (UERs). 2 Facilitate trade studies during the design process in order to compare performance versus cost for various EMS design strategies, and 3 Define a “common language” for specifying EMS requirements and the design features of an EMS in order to reduce ambiguity and, therefore, enhance consistency between specification and implementation.
SAE AIR4985-2017 history
2021SAE AIR4985A-2021 A Methodology for Quantifying the Performance of an Engine Monitoring System
2017SAE AIR4985-2017 A Methodology for Quantifying the Performance of an Engine Monitoring System
2005SAE AIR4985-2005 A Methodology for Quantifying the Performance of an Engine Monitoring System