When would a pilot be required to submit a detailed report of an emergency which caused the pilot to deviate from an ATC clearance?

• A. Within 24 hours if requested by ATC
• B. Within 48 hours if requested by ATC
• C. Immediately after the flight
• D. Only after the flight ends

Answer: (B)

When you deviate from an ATC clearance due to an emergency, ATC may ask you to file a detailed written report. The standard requirement is to submit that report within 48 hours after the flight, to the ATC facility that issued the clearance. This timeframe gives you enough opportunity to collect accurate details—times, altitudes, headings, weather, actions taken, communications—and provides ATC with useful information to review the incident and improve safety. The report is only required if ATC requests it, not automatically. Reporting immediately or only after the flight ends aren’t the specified window, and a 24-hour deadline isn’t the standard guideline.