A Navy investigation determined that technical misunderstandings and crew fatigue contributed to the mishap.

In practice, however, the long flight time, crew fatigue, and the ever-changing tactical picture would often render it difficult for a KC-135 to be present in-theater.

The major factors of the accident were the lack of a pre-flight checklist, and crew fatigue (126 flying hours in the last 26 days).

The report concluded that neither equipment failure nor crew fatigue or drug or alcohol use was a factor in the accident.

Turret stabilization is an important capability because it enables firing on the move and prevents crew fatigue.

The accident was believed to be caused by crew fatigue.

The two pilots lost their lives in the accident, which was attributed to crew fatigue and poor training.

This buffeting is a leading cause of crew fatigue and reduced airframe life.

A semi-automatic loading system is provided to increase the rate of fire and reduce crew fatigue.

Indeed, many investigations conducted in the wake of accidents have identified crew fatigue as one of the factors contributing to these accidents.