How often must aircraft be weighed?

The requirement for an aircraft to be weighed every four years is based on regulatory standards aimed at ensuring safety and performance throughout the aircraft's operational life. Weighing an aircraft determines its weight and center of gravity, which are critical factors influencing flight characteristics and compliance with performance specifications. Regular weighing helps authorities and operators ensure that the aircraft operates within its design limits and adheres to safety regulations.

While weighing is necessary in various scenarios, such as when modifications are made or if significant changes affect the aircraft's weight or balance, the routine interval of every four years provides a regular check to accommodate any gradual changes that may occur over time, such as accumulating wear and tear, changes in equipment or load, or structural modifications. This frequency strikes a balance between operational efficiency and maintaining safety standards.