For how many consecutive hours must a flight engineer be relieved of all duty in 7 consecutive days?

The correct answer indicates that a flight engineer must be relieved of all duties for 24 consecutive hours in a period of 7 consecutive days. This regulation is in place to ensure that flight engineers receive adequate rest, which is essential for maintaining alertness and performance during flight operations.

The requirement for a minimum rest period helps in preventing fatigue, which can adversely affect decision-making, operational safety, and the overall well-being of the crew. By allowing for a full 24-hour rest period within a 7-day cycle, it supports the effectiveness of the flight engineer in their critical role. Not only does this align with safety protocols, but it also complies with established guidelines for work and rest periods to promote a healthy work-life balance for aviation personnel.