Page:CAB Accident Report, United Airlines Flight 21.pdf/1

 REPORT OF THE CIVIL AERONAUTICS BOARD

Of the investigation of an accident involving civil aircraft of the United States NC 25678 which occurred near Chicago, Illinois, on December 4, 1940.

Note: In the body of this report the Board sets out not only its conclusions but also the reasons impelling it to arrive at those conclusions and gives a brief statement of the relevant evidence collected in order that those reading it may form their own conclusions. Those who desire only to consider the findings of fact and conclusion of the Board as to the probable cause may do so by turning to page where they are set out in brief form.