11.   Instead of an accidental torpedo strike, the new group suggested a mechanical failure caused an irreparable leak that flooded the submarine.

12.   Investigators say engine failure caused four of those accidents, but none of the malfunctions had anything in common.

13.   Investigators do not believe that a yaw damper failure can cause a crash.

14.   Most of the air traffic control center breakdowns were caused by failures of aging computer equipment.

15.   Other uncontained engine failures have caused fatal accidents.

16.   Such failures could cause malfunctions.

17.   Such a failure could cause the airline company to abandon its expansion plans and shrink to a regional carrier.

18.   That failure caused the government to revise its sale strategy and to break up the company into operating and potentially productive units.

19.   The Carnahan and Sifford families filed wrongful death lawsuits in Jackson County Circuit Court about two months after the crash, saying that mechanical failure caused the crash.

20.   The Federal Aviation Administration said engine failure might have caused the crash.