The machine is a tool that is useful for converting force into energy, where the energy can be used by humans for various activities. The use of machines is believed to simplify and speed up all existing activities. In addition, the machine is also found to have problems that can interfere with work productivity. This can give a loss to the company so that an analysis is needed to find the priority of the failure mode. This study aims to determine the source of failure in the TS analyzer engine in the coal quality survey service industry. The priority of failure on the machine is determined by FMEA analysis. The results showed that the damage to the inner-outer tube was caused by changes in temperature too quickly, O2 gas specifications were not suitable, and the engine shutdown method was not appropriate. The three failures on the damage to the inner outer tube with a value of RPN 336. The damage to the silicon carbon tube comes from over heating, unstable electric current and inadequate operator skills. The three failures on silicon carbon tube damage with an RPN value of 336