Girder deformation and repair. Accident vehicles refer to vehicles that are damaged by accidents due to unnatural losses, resulting in a decline in mechanical performance and economic value. The plastic repair of the right front longitudinal beam of an automobile is the deformation of the beam and has been repaired, which is one of the main manifestations of the accident vehicle. Appraisal methods of accident vehicles include appearance appraisal, lamp appraisal, insurance inspection and interior inspection.