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 FOREWORD

This report of facts and circumstanees and determination of probable cause by the National Transportation Safety Board is based upon informa- tion developed in a field investigation and a public hearing. The field investigation was conducted by the Safety Board in cooperation with the Federal Railroad Administration (ERA) and the Civil Aeromedical Institute (CAMI) of the Federal Aviation Administration. Much of the information obtained concerning the injuries and the clash-worthiness of the passenger cars is the result of CAMI's investigation and is contained in the Institute’s final report of theh investigation of the accident, titled "Application of Commercial Aircraft Accident Investigation Techniques to a Railroad Derailment." The public heating was conducted by the Safety Board in St Louis, Missouri, on July 13, 14 and 15, 1971. iii