Final answer:
The statement is true; while certain aircraft incidents require immediate notification to the NTSB as per federal regulations, not all incidents do.
Step-by-step explanation:
The statement is true. Some, but not all, aircraft incidents require immediate notification to the National Transportation Safety Board (NTSB). Under 49 CFR 830.5, there are specific types of aircraft incidents that mandate immediate notification, such as an accident, certain types of system failures, in-flight fire, or collisions. However, other less serious incidents may not require such timely notification. It is important for those involved in aviation to be familiar with the requirements, as these protocols are in place for safety and to facilitate the NTSB's investigative responsibilities.