When is an aircraft operator required to submit a report to the NTSB?

The requirement for an aircraft operator to submit a report to the National Transportation Safety Board (NTSB) comes into play primarily when the NTSB specifically requests such information. This is guided by regulations that ensure the NTSB can gather necessary data for investigations, particularly to enhance safety and understand the circumstances surrounding aviation incidents.

There are established criteria that outline when reports must be filed, but the key aspect here is the proactive request by the NTSB. This means that while an operator may have reporting obligations following certain types of incidents, the direct and immediate requirement to provide a report arises only upon the NTSB’s request. This helps streamline data collection for investigations and allows the NTSB to focus on specific incidents requiring deeper analysis.

Other options suggest more frequent or broad reporting requirements, which do not align with the specific guidelines under which the NTSB operates. The NTSB's targeted approach helps preserve resources and ensures that investigations are as focused and efficient as possible.