Why must loads on an aircraft be adequately secured?

Adequately securing loads on an aircraft is crucial primarily to avoid unplanned movement of the center of gravity (C of G) and to prevent potential damage to the aircraft. When loads are not secured, they can shift during the flight due to various factors such as turbulence, acceleration, or deceleration. This shifting can lead to a change in the aircraft’s C of G, which is vital for maintaining stable flight. An improper C of G can adversely affect the aircraft's performance, control, and safety, leading to potential complications during takeoff, flight, or landing.

In addition to stability concerns, unsecured loads can also physically damage internal components of the aircraft or lead to injury among crew and passengers. Therefore, securing all loads is a fundamental safety measure that ensures the aircraft operates within its designed parameters, protecting both the aircraft and everyone on board.