Never ignore a strange smell or a bag left alone
Aviation Emergency Reporting — Suspicious Items & the 4 C's
Last updated: 6 Jul 2026Reviewed by Ms. Rubab Nizami, Lead AVSEC Faculty
In short
A security emergency can start small — a smell, an unattended bag, a broken seal. This hub explains how to respond and report: the 4 C's for a suspicious item, unattended-baggage procedure, who to tell (BCAS/CISF/airline), and how to report a dangerous-goods incident.