When is the operator of an aircraft required to notify the NTSB?

The operator of an aircraft is required to notify the NTSB in cases of a flight control system malfunction or failure because such incidents can have serious implications for flight safety. Flight control systems are critical components of an aircraft, and any malfunction or failure could lead to a loss of control during flight, potentially resulting in an accident or incident. The NTSB must be informed to investigate the circumstances surrounding the failure, which helps in determining causes and improving safety regulations to prevent similar occurrences in the future.

In contrast, not all situations warrant NTSB notification. For example, minor maintenance issues typically do not need to be reported as they usually do not impact flight safety significantly. Similarly, while notification is necessary for accidents, the term "minor accident" could refer to incidents that may not meet the criteria needing a report to the NTSB. Lastly, reporting after every flight is not a regulatory requirement, as many flights may occur without any incidents that require notification. The duty to report is focused on significant safety concerns that could impact the operation of aircraft broadly, rather than routine operational matters.