In what scenario can scheduled rest be reduced from 11 hours to 9 hours?

The scenario where scheduled rest can be reduced from 11 hours to 9 hours is indeed when the reduction is compensated with 12 hours of rest following the duty period. This is designed to maintain safety and ensure that crew members have sufficient rest overall, even with a shorter rest period before a duty.

When the scheduled rest is reduced, it is critical that the crew is adequately compensated to mitigate fatigue risks. By allowing a shortened rest period before duty, the regulation mandates that the crew must then receive a longer rest period afterward. Thus, providing a 12-hour rest after the duty helps ensure that the overall rest time adheres to safety protocols and regulations, allowing for adequate recovery from fatigue.

This compensatory requirement is essential in aviation operations, especially under Part 135 regulations, which prioritize the safety of flight operations and the well-being of the crew. Other options do not provide the necessary compensatory rest following duty, which is crucial for maintaining operational safety and effectiveness.