Civil Aeronautics Board
（重定向自Civil Aeronautics Authority）
![Seal and flag of the defunct Civil Aeronautics Board on display in the National Air and Space Museum](/Images/godic/202501/04/Civil_Aeronautics_Board_flag_and_seal_by_Flapane0444.jpg")
![The Universal South Building at 1825 Connecticut Avenue NW. once housed the CAB headquarters](/Images/godic/202501/04/Universal_South_Building0444.JPG")
![](/Images/godic/202501/04/Fdr_sidefront0444.png")
The Civil Aeronautics Board (CAB) was an agency of the Federal government of the United States that regulated aviation services, including scheduled passenger airline service, and provided air accident investigation. The agency headquarters were in Washington, D.C.