What action must No.2 perform immediately after giving the cabin secure?

The action that No.2 must perform immediately after giving the cabin secure is to take their seat. This procedure is critical for ensuring that all crew members are safely in place and secured for departure. Once the cabin is secured, the focus shifts to preparing for takeoff, where the safety of the crew and passengers is paramount. By taking their seat, No.2 complies with safety regulations and contributes to a coordinated and efficient takeoff process.

In this context, checking cabin lights, notifying the Captain, or performing a final cabin check would generally be actions that precede or coincide with the cabin secure call rather than following it. After the cabin is confirmed secure, it’s essential for crew members to be seated and harnessed to ensure their safety and readiness for any changes in situational conditions during takeoff.