On 30-Sep-2021, Cementing job was ongoing at RHNS 17, after completing displacement of cement and during pressure testing the casing 7“, cement supervisor and DSV heard abnormal noise, they found out centrifugal pump on the unit has been burst causing part of pump's housing been ejected approximately 6 meters away. No injuries. Why it happened/Finding : Part of Centrifugal pump sheared and ejected under pressure Cement Supervisor did not switch off the pump, he did not make walkthrough to the equipment before case testing. Suction Discharge butterfly valves were closed caused the pump to be overheated Risk of human error for misuse of centrifugal pump was not captured in the risk register