A method and apparatus for managing health of a motor in an aircraft is presented. A first group of motor parameters and a second group of external bias parameters in sensor data received from a sensor system associated with the aircraft in which the first group of motor parameters is for an environment affected by operation of the motor in the aircraft and the second group of external bias parameters modifies an effect of the first motor group of motor parameters in identifying a health of the motor is monitored. The health of the motor is identified based on the first group of motor parameters and the second group of external bias parameters. An action is performed based on the health of the motor identified, wherein a controller enables increasing a confidence level in indicating the health of the motor.