This paper studies the asymptotic stability of a repairable system with repair time of failed system that follows arbitrary distribution. We show that the system operator generates a positive C0-semigroup of contraction in a Banach space. therefore there exists a unique. nonnegative. https://www.roneverhart.com/Twizzlers-Orange-Cream-Pop-Filled-Licorice-Twists-11-Ounce-Bag/