What type of insurance can provide coverage above and beyond an aircraft insurance policy's liability limits?

Excess liability coverage is specifically designed to provide protection above and beyond the limits of a primary aircraft insurance policy. This type of insurance kicks in when the liability limits of the underlying policy have been reached, offering an additional layer of financial security in the event of a significant claim. It is particularly crucial for aircraft operators who may face high liability costs due to the nature of aviation operations, such as injuries to passengers, damage to third-party properties, or other unforeseen incidents.

Collision insurance and comprehensive insurance primarily cover damages to the aircraft itself rather than liability aspects toward third parties or additional coverage beyond policy limits. Property liability coverage typically pertains to liabilities associated with property damage and does not extend the overall liability limits of aircraft insurance. Therefore, excess liability coverage is uniquely suited to address gaps in liability protection effectively, making it the correct answer in this context.