When must security checks be completed according to standard procedures?

The requirement for security checks to be completed before passenger boarding and before landing is rooted in the necessity of ensuring safety and security throughout the entire flight process. Performing these checks before passengers board the aircraft helps identify and mitigate any potential threats that could compromise the safety of those on board. This proactive measure ensures that no dangerous items are brought onto the aircraft, effectively safeguarding both passengers and crew from harm.

Additionally, conducting security checks before landing is essential for maintaining security in airports as passengers prepare to disembark. It ensures that any potential security breaches or suspicious activities are addressed immediately, contributing to a comprehensive security protocol that covers all phases of travel. This two-pronged approach to security checks is crucial in minimizing risks and enhancing the overall safety of the aviation environment.