In a Navy ship the knowledge of the equipment’s and systems state are a pillar and a necessity for operation success. Nowadays equipment’s are monitored with multiple sensors, and data are storage and processed through automatic systems. However, the data is not always useful, and most of the times it is never putted into useful data. The maintenance management in the organization understudy are made based in the maintenance management system and based in the opportunity and attributed missions considering good sense decision of the responsible engineers. The actual systems allow decision based on registered data. With this study, we intend to develop a FMECA risk analysis considering a selection of a navy ship equipment’s. The FMECA methodology will be adapted to include various severity parameters and data from equipment’s condition control. The result of adapted FMECA will give the risk of the equipment operation. For that, considering some maintenance action doesn´t occurred in time, it would be defined some strategies of mitigating the risk. With this methodology, we intend to build a support decision making system for the maintenance management based on risk.