What is a requirement for trash flaps in trash compartments?

Trash flaps in trash compartments must be operational and closed to ensure safety and cleanliness within the aircraft. Keeping the flaps operational allows for the safe disposal of waste while the aircraft is in service, preventing any potential spillage or odors that could affect passengers and crew. Additionally, maintaining the flaps in a closed position when not in use is crucial to contain any trash securely and to minimize the risk of items falling out during turbulence or other disturbances. This operational requirement underscores the importance of maintaining a clean and safe environment for everyone onboard.