How soon should the closest NTSB office be notified after an accident results in substantial damage?

The requirement to notify the National Transportation Safety Board (NTSB) immediately after an accident resulting in substantial damage stems from the need for rapid investigation and assessment of the circumstances surrounding the event. Substantial damage typically means damage that affects the structural strength, performance, or flight characteristics of the aircraft. Prompt notification allows for a timely investigation, which is essential for safety and for preventing similar incidents in the future.

Immediate reporting emphasizes the importance of gathering evidence while it is still fresh and ensuring that any aviation safety issues are addressed quickly, thus helping to promote the overall safety of air travel. This standard is crucial in maintaining the integrity of accident investigations and is a key regulatory requirement for pilots and aviation operators.