1.   The power failure caused the whole computer system to shut down.

2.   Although no serious incidents were reported, the power failure apparently caused at least one close call in flight and threw a fright into aviation circles.

3.   Boeing and FAA officials said the current inspection order does not suggest that rudder failure caused the two still-unexplained crashes.

4.   Boeing and FAA officials, however, said the inspection order does not suggest that rudder failure caused the still-unexplained USAir crash in Pittsburgh.

5.   A separate investigation by the National Transportation Safety Board into whether mechanical failure caused the explosion will continue, officials said.

6.   A separate investigation by the National Transportation Safety Board into whether mechanical failure caused the explosion will continue.

7.   But there is no evidence, either, that a mechanical failure caused the EgyptAir crash.

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

9.   Gonzalez contended that the fund was so small that a few failures could cause it to collapse.