What must be done with items stored in the aircraft before flight?

Items stored in the aircraft before flight must be secured to ensure the safety of everyone on board. When items are not secured, they can become hazardous projectiles during turbulence or sudden maneuvers, potentially injuring passengers and crew or damaging the aircraft. Properly securing stowed items prevents them from shifting or becoming dislodged, thereby maintaining the aircraft's weight distribution and balance, which are critical for safe operation. Additionally, securing items is a fundamental aspect of safety protocols in aviation, emphasizing the importance of preparing the cabin area before departure.