1.   But in discussing its recommendations Tuesday, the board made clear that design problems had helped make the crew error possible.

2.   But some reports are still being prepared, and the extent of crew error is unclear.

3.   It tumbled out of control then because of crew errors, and two space-walking astronauts had to go out and haul it in.

4.   So far, it has attributed the difficulties to crew error or a computer software problem.

5.   Some industry executives argue that not enough research is being done on human factors and the study of flight crew errors.

6.   Investigations by both the Americans and the Italians have indicated crew error, concluding that the men were flying too low and too fast.

7.   Navy and Defense Department officials would not comment Friday on the newspaper reports about crew errors.

8.   The pilots, who spoke anonymously to the Herald, criticized a preliminary report from Colombian authorities that suggested crew error was to blame.

9.   The pilots, who spoke anonymously, criticized a preliminary report from Colombian authorities that suggested crew error was to blame.