The operator of an aircraft involved in an incident must submit a report to the nearest NTSB field office when?

• A. Immediately
• B. Within 24 hours
• C. When Requested
• D. Within 7 days

Answer: (C)

Immediate notification is required. The operator or person in charge must notify the nearest NTSB field office immediately after an aircraft accident or certain serious incidents, typically by telephone. This prompt contact lets investigators start the investigation quickly, preserve evidence, and coordinate the response while details are fresh. A separate written accident/incident report must be submitted to the NTSB within 10 days after the accident, not waiting for a request. So, initial notice is mandatory right away; the other timeframes apply to later reporting, not the initial notification.