MV-03-3

Vibration signal from MV-03-3

During engine operation, MV-03-3 measures vibration from the engine structure and sends the signal through its cable to the USS-6 matching unit. The signal is then conditioned and transmitted to the BE-9E electronic processing module. BE-9E compares the received vibration level with preset limits and activates cockpit annunciators if the accepted vibration level is exceeded. The working signal path is MV-03-3 → USS-6 → BE-9E → cockpit annunciators.

MV-03-3 in the IV-500E system

MV-03-3 is one of the primary sensors in the IV-500E engine vibration monitoring equipment. The system is used for continuous monitoring of vibration velocity during ground operation and flight. It helps detect vibration conditions linked with rotor imbalance, bearing wear, shaft alignment issues, rotor damage or other dynamic defects. The sensor does not decide whether the condition is dangerous. It only provides the vibration signal that is later processed by the IV-500E equipment.

Application of MV-03-3 on TV3-117 engines

The MV-03-3 sensor is associated with Mi-8, Mi-17 and Mi-171 helicopters equipped with TV3-117 engines. It is mounted externally on the engine according to the aircraft and engine installation documentation. The longer cable is useful where routing inside the nacelle or along the engine bay requires more length than the standard sensor configuration. During inspection, the sensor body, cable, shielding, connector area and mounting point should be checked together.

Identification and ordering of MV-03-3

Before ordering MV-03-3, the marking should be checked against the IV-500E documentation, aircraft wiring scheme and engine installation data. It is also important to confirm whether the required item is MV-03, MV-03-1, MV-03-2 or MV-03-3, because the cable configuration differs. For correct selection, provide the helicopter type, engine type, installed vibration monitoring system and photos of the existing sensor or label. The product is also known under alternative designations MV-03-3, MV033, МВ-03-3 and МВ033.