How long after an emergency must an irregularity report be filed?

• A. 24 hours from end of pairing
• B. 12 hours from end of pairing
• C. 48 hours from end of pairing
• D. 72 hours from end of pairing

Answer: (A)

When an irregular event occurs, you must file an irregularity report within 24 hours from the end of your pairing. “End of pairing” refers to when the crew’s assigned duty period for that trip is finished, not the moment of the incident itself. This timing keeps the report timely so details are still fresh for accurate documentation and regulatory review. A shorter window would be too tight to gather all facts, while longer windows could delay safety oversight and corrective actions.