What is the primary reason for screening hold baggage before loading onto an aircraft?

The screening of hold baggage before loading onto an aircraft primarily serves the vital purpose of preventing the introduction of prohibited articles into the aircraft. This process is a fundamental aspect of aviation security, aimed at ensuring that any dangerous items, such as explosives or weapons, do not make it onto the plane. By subjecting all hold baggage to rigorous screening procedures, security personnel can detect potential threats, thereby significantly mitigating risks associated with air travel.

This step is crucial in maintaining the safety of passengers and crew, as well as safeguarding the aircraft itself. Effective baggage screening protocols are designed to enhance overall security by identifying and ensuring that only safe and compliant items are allowed aboard, thus upholding the integrity of the aviation system as a whole.