Virgin Atlantic is hit by frightening safety scare after pilot's disturbing secret was exposed
What specific safety regulations did Danica Theuma violate?

Danica Theuma violated international safety rules regarding duty times and rest periods, as well as breaching her contract which did not allow her to work for another airline. These regulations are in place to ensure passenger and crew safety by preventing pilot fatigue, which can lead to confusion, disorientation, and hallucinations.
What impact does fatigue have on pilot performance according to studies?

Fatigue significantly impairs pilot performance, increasing the likelihood of errors and safety risks. Studies show that sleep deprivation can lead to confusion, disorientation, and hallucinations, all of which are dangerous in a cockpit. Fatigue slows reaction times, impairs decision-making, and reduces situational awareness. It's a major contributor to aviation accidents and must be effectively managed to ensure flight safety.