41.   But the safety board said that this belief was obsolete, because such bridging is not possible on modern aircraft.

42.   But the safety board wants the new equipment installed as soon as possible.

43.   But the idea of a mechanical failure still dominates at the safety board, particularly in its Washington offices.

44.   But they are a new technology for the safety board.

45.   But the report does not fix blame for the crash because that is not the role of the safety board, said Ted Lopatkiewicz, a board spokesman.

46.   But the safety board may have identified two mechanisms by which a single failure could cause a rudder malfunction.

47.   By recommending action, the safety board is trying to add a layer of safety by making an explosive environment impossible in the fuel tank.

48.   Carmody said investigators from the safety board and officials from the FBI and local agencies would spend the next few days in Aspen trying to determine what happened.

49.   Clearly, it was not something that the safety board, in its nightly progress meetings to update information, had wanted disseminated.

50.   Donaldson argues that the plane was destroyed by a missile and that the safety board and the FBI are trying to hide this.