Ethiopian railways corporation invest a lot of money and construct AALRT and it's warmlyrnwelcomed by the people. Since it is been 1 and half year the trains start working, And even ifrnthe design life cycle of AALRT train car body structure should not be less than 30 years,rntrain's body start to degrade from day to day. This will be a problem for AALRT in terms ofrnquality of service, in terms of maintenance cost and damage of train body before design liferncycle. rnThis paper aims to discuss the effect of un acceptable passenger over load effect on life cyclernof AALRT train car body steel structure and show the effect of different loading conditionsrnby modeling car body steel structure and making analysis using Catia and Ansys software . rnThe methodology of this paper starts by collected real overload condition data's, studied carrnbody frame structure and materials used for AALRT trains, designed frame steel structure ofrnAALRT train using Catia V5R19 software and analyzed by Ansys workbench 15.0 softwarernusing seven different loading conditions. The total fatigue life analyzed by using PalmgrenMinerrnrnLinear Damage Rule and the final fatigue life cycle result found. The calculated liferncycle result converted to time. rnThe output of the analysis shows that some parts of under frame steel structures onrnExit/Entrance area have fewer life cycles. The connection of the high floor and low floorrnarea and near to turning table have less life cycle than design life, when the loading conditionrnreach at maximum level . But the total life cycle is above from the design life. rn Finally the total fatigue life cycle of four parts on Motor car had below the design life cycle.rnBy adding additional reinforcement to those four parts, it is possible to increase the fatiguernlife. Even it can resist the over load at standing and seat area beyond designed load limit.