  Reparable systems are systems that are characterized by their ability to
undergo maintenance actions when failures occur. These systems are often
described by transport equations, all coupled through an integro-differential
equation. In this paper, we address the understudied aspect of the
controllability of reparable systems. In particular, we focus on a two-state
reparable system and our goal is to design a control strategy that enhances the
system availability -- the probability of being operational when needed. We
establish bilinear controllability, demonstrating that appropriate control
actions can manipulate system dynamics to achieve desired availability levels.
We provide theoretical foundations and develop control strategies that leverage
the bilinear structure of the equations.
