What should be the first step taken when conducting a Pre-Departure Walk Around?

The appropriate first step when conducting a Pre-Departure Walk Around is to perform a visual walk-around of the aircraft. This step is crucial as it allows the crew to inspect the exterior of the aircraft for any visible issues that may need attention before flight, such as checking for leaks, ensuring that all access panels are closed, and looking for any signs of damage that could affect the safety of operation.

Conducting this visual inspection first provides a general overview of the aircraft's condition, and it sets the stage for subsequent checks to ensure safe and efficient operations. By identifying any potential problems early through this walk-around, the crew can address these issues appropriately before proceeding to other tasks, like ensuring all cargo is loaded or checking cockpit instruments. This proactive approach is key to maintaining safety standards in aviation.