What is one expected outcome of NTSB investigations?

The expected outcome of NTSB investigations is primarily the improvement in future aviation safety. The National Transportation Safety Board conducts thorough investigations into aviation accidents and incidents to identify underlying causes and contributing factors. Their findings aim to provide actionable recommendations that can enhance safety measures, procedures, and regulations within the aviation industry. By addressing these issues, the NTSB helps prevent similar accidents from occurring, thereby fostering a safer flying environment for all. This focus on safety improvement aligns with the agency's mission to advance transportation safety, making it a central outcome of their investigative work.

The other options do not align with the primary purpose of NTSB investigations. While reducing aircraft maintenance costs, increasing the number of pilot licenses issued, and expanding airport infrastructure are important aspects of aviation operations, they do not directly result from the NTSB's investigative findings and recommendations. Instead, NTSB investigations are fundamentally centered on safety enhancements and risk mitigation.