The final preflight walk-through should be finished during which phase?

• A. During boarding
• B. Before boarding begins
• C. After boarding begins
• D. After engine start

Answer: (C)

The main idea here is timing the final preflight check so it serves as the last chance to verify everything is ready before the aircraft moves. This final walk-through is done after boarding has begun, but before the engines are started. It allows the crew to confirm exterior and cabin readiness in the same window when passengers are on board and the aircraft is secured for pushback. If you complete it too early, you might miss issues that become relevant once people are aboard, and if you wait until after the engines start, you’ve already moved into a phase where a problem could affect departure. So finishing the final preflight walk-through after boarding has begun ensures a safe, clear path to taxi and takeoff.