Which method would be least effective at preventing FOD during storage?

Leaving items uncovered is indeed the least effective method at preventing Foreign Object Debris (FOD) during storage. When items are not covered, they are exposed to environmental factors that can introduce debris, such as dust, dirt, and even small animals or insects, into the storage area. This exposure increases the risk of these foreign objects contaminating the items, which could lead to operational hazards when the items are eventually used.

In contrast, sealing products properly and using protective materials greatly minimize the risk of FOD by creating barriers that keep contaminants away from the stored items. Labeling storage areas helps ensure proper organization and easier access, reducing the potential for misplaced items that might contribute to FOD. Therefore, covering items during storage is crucial for maintaining a clean and safe environment.