Method and system for testing a sensor of a propeller blade angle position feedback system

A system for testing a sensor of a propeller blade angle position feedback system, the system comprising:

• a feedback device comprising a ring and at least one pair of position markers spaced from one another around a circumference of the ring;
• a sensor at a known position relative to the feedback device, the sensor configured for successively detecting passage of the position markers as the feedback device rotates at a known rotational speed and an axial distance between the sensor and the feedback device varies;
• a processing unit;
• and
• a non-transitory memory having stored thereon program instructions executable by the processing unit for:
• receiving a sensor signal from the sensor as the feedback device rotates at the known rotational speed and the axial distance between the sensor and the feedback device varies;
• determining from the sensor signal a measured position of the sensor relative to the feedback device and a measured rotational speed of the feedback device;
• comparing the measured position and the measured rotational speed to the known position and the known rotational speed to determine a sensor accuracy;
• accepting the sensor when the sensor accuracy is above a threshold;
• and
• rejecting the sensor when the sensor accuracy is below the threshold.