11.   Pluta said she did not believe the plane had rolled over.

12.   Seconds later, without warning, the autopilot snapped off, and the plane rolled suddenly to the left.

13.   So the plane rolls right.

14.   Sudden rudder movement, which could cause the plane to roll and dive toward the ground, is a possibility in both the Pittsburgh and Colorado crashes.

15.   That includes situations where the plane rolls steeply sideways or even upside down, or pitches up and seems to want to stand on its tail.

16.   The general aviation plane was rolling out for takeoff at the time of the collision.

17.   The lost flap caused the plane to roll slightly.

18.   The plane rolled, a wingtip caught on the ground during a slight descent and the plane crashed and was destroyed.

19.   The plane was rolling down the runway when the pilot called for a parachute check.

20.   The swing could then cause the plane to roll uncontrollably.