Phases of Flight Delta Assessment Practice Test

The final preflight walk-through is the last safety check you perform before the aircraft is cleared to start engines, and it happens once boarding has begun. Doing it after passengers have started boarding allows you to verify real-time conditions: all doors are secured and properly closed, slides armed if needed, exterior panels and access doors secured, ground equipment is clear of the aircraft, and there are no hazards around the airframe that could affect the pushback or taxi. If you waited until engine start, you’d miss any issues that only become apparent once people are aboard or equipment is moved for boarding. If you did it before boarding or during boarding, you wouldn’t have the latest context to confirm everything is truly ready for doors closed and engines started. After boarding has begun strikes the right balance: you complete the check with current conditions, just before engine start.