During which period is it appropriate to complete the final preflight walk-through?

During which period is it appropriate to complete the final preflight walk-through?

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

Answer: (D)

The final preflight walk-through is the last, real-time exterior and interior check you perform before the aircraft moves. It confirms that nothing has changed since the previous checks and that doors are secure, the cabin is prepared, and external items like tires, control surfaces, sensors, and emergency equipment are in proper condition. Doing this during boarding makes the most sense because the aircraft is parked, doors are open for access, and you can spot and address any issues while passengers are boarding. If you waited until after engine start or pushed it later than boarding, you’d lose the chance to fix problems before taxi or pushback. Doing it during boarding ensures everything is verified and safe before departure.