What can result from neglecting regular aircraft inspections?

Neglecting regular aircraft inspections can lead to a higher risk of mechanical failure because routine maintenance is essential for identifying and addressing potential issues before they escalate into serious problems. Inspections allow mechanics to detect wear, corrosion, and other forms of degradation in aircraft systems and components. If these checks are overlooked, small defects can develop into significant malfunctions, jeopardizing not only the aircraft's performance but also the safety of the crew and passengers. Regular inspections are designed to ensure that the aircraft is operating within required safety standards, thus minimizing the likelihood of incidents stemming from undetected mechanical issues.

The other options do not accurately represent the consequences of neglecting inspections. Increased fuel efficiency, enhanced safety protocols, and lower operating costs are all outcomes of diligent maintenance and regular inspections, not neglecting them. Therefore, the correct answer highlights the critical importance of consistent inspection regimes in aviation safety and reliability.