Why is it important for aircrew members to have a secondary restraint when performing duties?

Having a secondary restraint is crucial for aircrew members performing their duties because it provides additional protection in the event that the primary seat belt is released. In the unpredictable environment of aviation—where sudden turbulence, emergency landings, or other abrupt aircraft movements can occur—the secondary restraint system minimizes the risk of injury by keeping the crew securely in their seats, even if their primary restraint fails. This layer of safety ensures that aircrew can remain focused on performing their responsibilities, especially in emergency situations, without the distraction or danger posed by being thrown from their seat.