During 1987, Northwest Airlines Flight 255 crashed in Detroit in the summer, and Continental Airlines Flight 1713 crashed in Denver in the winter. This article will describe the reconstruction, simulation, and animation of the time dependent flight path for each accident through a process known as forensic engineering. Forensic engineering is the application of scientific and engineering knowledge to legal matters, such as accident reconstruction. The flight paths were reconstructed as an aid in visualizing the sequence of events and the factors involved in each accident.