A crew's typical duty day starts when?

• A. At mission brief, and includes pre-flight and run-up checks
• B. On arrival at the airfield
• C. After the aircraft is fueled
• D. At the end of the last mission

Answer: (A)

The duty day begins with the mission briefing, where the team plans the sortie, reviews weather and safety procedures, assigns roles, and coordinates contingencies. From there, the crew moves into pre-flight and run-up checks to verify the aircraft’s readiness and performance before takeoff. These preparation steps are integral to starting the day's operations and set the stage for safe, coordinated flight. Arriving at the airfield or fueling are subsequent activities, and ending the last mission marks the close of the duty day, not its start.