The board of inquiry shall consist of a Member of the Board who shall be chairman of the board of inquiry, and such other employees as may be designated by the chairman of the board of inquiry. Assignment of a Member to serve as the chairman of each board of inquiry shall be determined by the Board. The board of inquiry shall examine witnesses and secure, in the form of a public record, all known facts pertaining to the accident or incident and surrounding circumstances and conditions from which cause or probable cause may be determined and recommendations for corrective action may be formulated. [49 FR 32853, Aug. 17, 1984]