Mechanical failure on this tractor trailer was analyzed by an ARCCA team of accident reconstructionists and mechanical engineers specializing in failure analysis. The mechanical engineer determined that a part failure was proximate to the tractor trailer losing control in this collision. The accident reconstructionist analyzed the pre and post impact movements of the tractor trailer to reconstruct the speeds and forces involved in the collision. It was determined that the driver of the truck was traveling at the speed limit at the time of the failure, and the claim was successfully subrogated against the manufacturer of the failed part.