General Dynamics announced the sale of the Missile Systems Division segment of Convair to Hughes Aircraft Company in May 1992 and the Space Systems Division segment to Martin Marietta in 1994. In July 1994, General Dynamics and McDonnell Douglas mutually agreed to terminate Convair's contract to provide fuselages for the 300-seat MD-11 airliner. Manufacturing responsibility was to be transferred to McDonnell Douglas, which said it would not preserve the operation in San Diego. General Dynamics had tried for two years to sell the Aircraft structures segment of Convair unit, but the effort ultimately failed.