An effort has made to describe how the dynamic analysis of Finite Element model of trolley of Ground Power Unit (GPU) of Jaguar and Mirage-2000 aircrafts which is four wheeled light motor vehicle used to boot or start the aircrafts in Indian air force. The full transient dynamic analysis is used in ANSYS8.0 for GPU analysis. The dynamic behavior of existing design of chassis of GPU is carried out at different road conditions, different velocities with respective to negotiation of rigid wheels. This analysis is performed by considering four different cases of wheels falling into the ditches....