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 =APPENDIXES= ==APPENDIX A INVESTIGATION AND HEARING/DEPOSITION==

Investigation
At 9 a.m. on December 12, 1990, the Federal Railroad Administration notified the National Transportation Safety Board of the derailment and collision of Amtrak train 66 with MBTA commuter train 906 at Back Bay station in Boston, Massachusetts. An investigator from the Eastern regional office arrived on scene at 1:30 p.m., an investigator-in-charge and the Safety Board investigative team were dispatched from Washington, D C Safety Board investigators examined operations, track, mechanical components, event recorders, signals, survival factors, and human performance issues.

The Federal Railroad Administration, the State of Massachusetts, the National Railroad Passenger Corporation, the Massachusetts Bay Transit Authority, the Brotherhood of Locomotive Engineers, and the City of Boston Fire Department assisted in this investigation.

Hearing/Deposition
On March 21 and 22, 1991, the Safety Board staff conducted a deposition proceeding in Boston Twelve witnesses testified.