FAN IMBALANCE
Diagnosed issue
In January 2026, Sonora detected vibration patterns indicating shaft imbalance on a fan operating in the oil tank ventilation system. The data showed characteristic behavior associated with imbalance, prompting a recommendation to inspect the fan impeller and shaft.
During inspection, CIE LT Forge identified significant contamination on the fan impeller, while no bearing defects were found. The accumulated debris caused an imbalance in the rotating assembly, leading to increased vibration levels. The issue was validated as contamination-induced imbalance.
Results
Early detection of imbalance enabled quick identification of the root cause and prevented further mechanical stress on the fan and its components. By distinguishing between bearing faults and imbalance, Sonora supported targeted maintenance actions and helped avoid potential equipment damage and operational disruption.