A pre-flight inspection (often called a "walk-around") is a meticulous, hands-on examination of an aircraft conducted by the pilot before every single flight to ensure it is airworthy and safe. In 2026, this process follows a strict manufacturer-approved checklist. The pilot starts in the cockpit to check that all documents are present and that the controls move freely. They then move outside, checking the fuselage for structural damage, the wings for ice or dents, and the landing gear for tire wear or hydraulic leaks. Crucially, the pilot "sumps" the fuel, drawing a small sample from the tanks to check for water or debris contamination. They also verify oil levels and ensure that "pitot tubes" and "static ports" (which provide speed and altitude data) are clear of bird nests or insects. This inspection is the pilot's final opportunity to catch mechanical issues on the ground rather than at 10,000 feet. It is a non-negotiable part of aviation culture, emphasizing that the pilot in command is ultimately responsible for the lives of everyone on board.