835.3—Scope of permissible testimony.

(b) For the reasons stated in paragraph (a) of this section and § 835.1, Board employees may only testify as to the factual information they obtained during the course of an investigation, including factual evaluations embodied in their factual accident reports. However, they shall decline to testify regarding matters beyond the scope of their investigation, and they shall not give any expert or opinion testimony.
(c) Board employees may testify about the firsthand information they obtained during an investigation that is not reasonably available elsewhere, including observations recorded in their own factual accident reports. Consistent with the principles cited in § 835.1 and this section, current Board employees are not authorized to testify regarding other employee's reports, or other types of Board documents, including but not limited to safety recommendations, safety studies, safety proposals, safety accomplishments, reports labeled studies, and analysis reports, as they contain staff analysis and/or Board conclusions.
[55 FR 41541, Oct. 12, 1990, as amended at 63 FR 71607, Dec. 29, 1998; 64 FR 5622, Feb. 4, 1999]