10 U.S.C. § 2255: Aircraft accident investigation boards: composition requirements

a majority of the members (or in the case of a board consisting of a single member, the member) is selected from units other than the mishap unit or a unit subordinate to the mishap unit; and in the case of a board consisting of more than one member, at least one member of the board is a member of the armed forces or an officer or an employee of the Department of Defense who possesses knowledge and expertise relevant to aircraft accident investigations. the remote location of the aircraft accident; an urgent need to promptly begin the investigation; or a lack of available persons outside of the mishap unit who have adequate knowledge and expertise regarding the type of aircraft involved in the accident; and the objectivity and independence of the aircraft accident investigation board will not be compromised. In the case of an aircraft accident investigation board consisting of a single member, the member shall consult with a member of the armed forces or an officer or an employee of the Department of Defense who possesses knowledge and expertise relevant to aircraft accident investigations. Not later than 60 days after an aircraft accident involving an aircraft under the jurisdiction of the Secretary of a military department, the Secretary shall determine whether the aircraft accident should be designated as a Class A accident for purposes of this section. the loss of life or permanent disability; damages to the aircraft, other property, or a combination of both, in an amount in excess of the amount specified by the Secretary of Defense for purposes of determining Class A accidents; or the destruction of the aircraft. The term “mishap unit”, with respect to an aircraft accident investigation, means the unit of the armed forces (at the squadron or battalion level or equivalent) to which was assigned the flight crew of the aircraft that sustained the accident that is the subject of the investigation.