51.   But the independent crash investigators cautioned that asymmetric lift could also be caused by a mechanical problem.

52.   But the only way to keep Boeing in the suit is to maintain that mechanical problems caused the crash.

53.   But the week has gotten off to an auspicious start for Martin, who encountered all kinds of mechanical problems during his practice round Monday.

54.   But they cannot be sure whether mechanical problems or pilot error was to blame until the plane is raised from the ocean floor.

55.   But the harm will be manageable, analysts said, if the crash was caused by a mechanical problem and not by terrorists.

56.   But they have had a variety of mechanical problems, including missing and broken bolts.

57.   But those flights were delayed that morning because of mechanical problems or because they were waiting to take off when the FAA ordered all flights grounded.

58.   Compton had one of the fastest cars at Talladega before running into mechanical problems.

59.   Despite its mechanical problems, Galileo has scored some stunning firsts during its journey.

60.   Designed in France and built in Wisconsin, the Alliance was plagued with mechanical problems.