Pilots are supposed to do a preflight inspection of the aircraft before each and every flight. For the most part, all pilots adhere to this. Especially, for the first flight of the day. An abbreviated inspection can be done for subsequent flights that same day called a through-flight inspection.

Every commercial aircraft undergoes a rigorous "Pre-Flight Inspection" (PFI) before it is cleared to depart. This process begins with a pilot performing a physical "walk-around" to visually inspect the fuselage, wings, engines, tires, and control surfaces for any signs of damage, leaks, or debris (FOD). Simultaneously, flight crews verify the operational status of internal systems, including hydraulics, electronics, and emergency equipment. Beyond these daily checks, aircraft are subject to a hierarchy of maintenance cycles. "Line Maintenance" occurs during turnarounds, while "A-Checks" happen roughly every 500 flight hours. More intensive "C-Checks" and "D-Checks" involve dismantling parts of the plane for deep inspection every few years. In 2026, many airlines have integrated AI-driven predictive maintenance sensors that monitor engine health in real-time, allowing crews to address potential issues before they even manifest physically. This multi-layered approach ensures that by the time you board, the aircraft has been vetted by both human expertise and advanced digital diagnostics for maximum safety.