What condition must the AED's seal meet during a preflight check?

• A. Red seal intact
• B. Blue or green seal intact
• C. Yellow seal intact
• D. No seal required

Answer: (B)

The correct choice indicates that the AED's seal must be blue or green and intact during a preflight check. This is crucial because maintaining the integrity of the seal ensures that the device has not been tampered with and is ready for emergency use. The specific colors, blue or green, indicate that the device is within its operational parameters and has undergone necessary checks and maintenance.

Moreover, these color seals function as a visual cue to flight crew members, allowing for quick identification that the AED is safe to use in case of an emergency. Ensuring the seal's integrity also minimizes the risk of equipment malfunction or inappropriate usage scenarios, which is essential for the safety of everyone on board.