In part, this is because of the robust mechanics of turboprops and in part because Air Tractor's fuel tanks have rubber membranes which close around bullet holes to slow leaks.

On tracks with debris or rubbish you often see mechanics removing this from the car's air intakes during a stop, ensuring radiator efficiency is not compromised.

Think of all the air-conditioning engineers, realtors, district nurses, roadside mechanics, and law students.