The TRVWS continuously monitors the tail rotor vibration of a rotary wing aircraft and gives a visual warning when vibration levels exceed preset limits. The unit monitors both the axial and radial vibrations on the tail rotor.
This LRU features two warning levels indicated using AMBER and RED lamps in the cockpit. The thresholds for these warnings are preset in the unit. Accordingly, the unit triggers   AMBER or RED warning lamp based on the current vibration level. The warnings of the radial and axial channels are ORed together for annunciation. Additionally, analog outputs are provided for recording on the aircraft’s FDR system.