1. An erosion detection system for detecting erosion in blades in a turbine engine, the erosion detection system comprising: a sensor data processor, the sensor data processor receiving engine sensor data from the turbine engine and generating sensor data residuals and sensor data residual slopes from the sensor data; and a cluster analysis mechanism, the cluster analysis mechanism performing a cluster analysis on the sensor data residuals and sensor data residual slopes to determine a likelihood that erosion has occurred in the blades.